FITS images used in this processing run:

Field UMi-02-Q2b1x1 reference image: UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Field UMi-02-Q2b1x1 reference image: UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Field UMi-02-Q2b1x1 second-epoch image: UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Field UMi-02-Q2b1x1 second-epoch image: UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits

## VaST run with SExtractor config file default.sex.telephoto_lens_onlybrightstars_v1 ##
Images processed 4
Images used for photometry 4
Ref.  image: 2461149.86733143 19.04.2026 08:48:47.436   /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
First image: 2461149.86733143 19.04.2026 08:48:47.436   /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Last  image: 2461260.90867015 08.08.2026 09:48:19.101   /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.53
Magnitude-Size filter: Disabled
For each source choose aperture with the smallest scatter: YES
Photometric errors rescaling: NO
Number of identified bad images: 0
Number of SysRem iterations: 0
User-specified moving object: none
Computation time: 2 seconds
Number of parallel threads: 3
SExtractor parameter file: default.sex
Some important SExtractor parameters:
DETECT_MINAREA  10.0             # minimum number of pixels above threshold
DETECT_THRESH   10.0             #  or , in mag.arcsec-2
ANALYSIS_THRESH 10.0             #  or , in mag.arcsec-2
SATUR_LEVEL     55000.0         # level (in ADUs) at which arises saturation
GAIN            0.37            # detector gain in e-/ADU
VAST_SKIP_INDEX_VS_MAG is set - skipping the lib/index_vs_mag variability-index fitting
Total objects detected (at least 2 times):  5854
Objects passed selection criteria:  5819
Measurements per detected object (mean, median, min, max):    2.3    2.0    2    4
Measurements per selected object (mean, median, min, max):    2.3    2.0    2    4
Average stars detected per image: 3484
Average stars matched: 3400.25 (97.5962 %)
Memory usage VmPeak:   232800 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Thu Aug  6 15:05:04 CDT 2026
VaST build number  1.0rc89-190-gdf2934b0
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-06)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sat Aug  8 04:51:54 CDT 2026
Host name: tau
############################################################
WARNING: VaST exited with code 1 on the field UMi-02-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_vSTL ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461149.86733143 19.04.2026 08:48:47.436   /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
First image: 2461149.86733143 19.04.2026 08:48:47.436   /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Last  image: 2461149.86792689 19.04.2026 08:49:38.883   /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.26
Magnitude-Size filter: Disabled
For each source choose aperture with the smallest scatter: YES
Photometric errors rescaling: NO
Number of identified bad images: 0
Number of SysRem iterations: 0
User-specified moving object: none
Computation time: 6 seconds
Number of parallel threads: 3
SExtractor parameter file: default.sex
Some important SExtractor parameters:
DETECT_MINAREA  2.0             # minimum number of pixels above threshold
DETECT_THRESH   3.0             #  or , in mag.arcsec-2
ANALYSIS_THRESH 3.0             #  or , in mag.arcsec-2
SATUR_LEVEL     57000.0         # level (in ADUs) at which arises saturation
GAIN            0.83            # detector gain in e-/ADU
WEIGHT_TYPE BACKGROUND
VAST_SKIP_INDEX_VS_MAG is set - skipping the lib/index_vs_mag variability-index fitting
Total objects detected (at least 2 times):  32086
Objects passed selection criteria:  31909
Measurements per detected object (mean, median, min, max):    2.0    2.0    2    2
Measurements per selected object (mean, median, min, max):    2.0    2.0    2    2
Average stars detected per image: 34578
Average stars matched: 33365.5 (96.4934 %)
Memory usage VmPeak:   257764 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Thu Aug  6 15:05:04 CDT 2026
VaST build number  1.0rc89-190-gdf2934b0
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-06)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sat Aug  8 04:52:26 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################

######## Processing parameters ########
AAVSO_COMMENT_STRING= NMW-TexasTech Camera-2 135mm f/2.2 telephoto lens + QHY600M CMOS
ASTCHECK_ASTEROID_SEARCH_RADIUS_ARCSEC= 
BAD_REGION_FILE= /var/www/nmw_calibration/TTUQ2b1x1/TTUQ2_bad_region.lst
CAMERA_SETTINGS= TTUQ2b1x1
CHECK_POINTING_ACCURACY= yes
DARK_FRAMES_DIR_OR_FILE= /var/www/nmw_calibration/TTUQ2b1x1/darks
EXCLUSION_LIST= ../exclusion_list_TTUQ2.txt
FILTER_BAD_IMG__MAX_APERTURE_STAR_SIZE_PIX= 12.5
FILTER_BAD_IMG__MAX_ELONGATION_AminusB_PIX= 0.55
FILTER_BAD_IMG__MIN_APERTURE_STAR_SIZE_PIX= 2.0
FILTER_BRIGHT_MAG_CUTOFF_TRANSIENT_SEARCH= -5
FILTER_FAINT_MAG_CUTOFF_TRANSIENT_SEARCH= 15.5
FLAT_FIELD_DIR_OR_FILE= /var/www/nmw_calibration/TTUQ2b1x1/flats
FRAME_EDGE_OFFSET_PIX= 600
GAIA_BAND_FOR_CATALOGED_SOURCE_CHECK= 
MAX_NEW_TO_REF_MEAN_IMG_VALUE_RATIO= 100
DISABLE_NEW_TO_REF_MEAN_IMG_RATIO_CHECK= yes
MAX_NEW_IMG_MEAN_VALUE= 25000
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS= 0.18
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS_SOFT_LIMIT= 0.12
MPC_CODE= V36
NMW_CALIBRATION= /var/www/nmw_calibration
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_HARD_LIMIT= 10000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 8000
OMP_NUM_THREADS= 3
ONLINE_MPCHECKER_BUTTON_ASTEROID_SEARCH_RADIUS_ARCMIN= 
PHOTOMETRIC_CALIBRATION= 
REQUIRE_PIX_SHIFT_BETWEEN_IMAGES_FOR_TRANSIENT_CANDIDATES= yes
SEXTRACTOR_CONFIG_BRIGHTSTARPASS= default.sex.telephoto_lens_onlybrightstars_v1
SEXTRACTOR_CONFIG_FILES= default.sex.telephoto_lens_onlybrightstars_v1 default.sex.telephoto_lens_vSTL
STARMATCH_RADIUS_PIX= 5
SYSREM_ITERATIONS= 0
TELESCOP= 
TELESCOP_NAME_KNOWN_TO_VaST_FOR_FOV_DETERMINATION= 
UCAC5_PLATESOLVE_ITERATIONS= 2
FPACK_FULLY_CALIBRATED_IMAGE= no
#######################################
HOSTNAME= tau
USER= 
HOME= 
#######################################
SExtractor catalog cache: enabled, directory /data_ssd/NMW-TexasTech/vast_sextractor_cache
Reference image directory is set to /data_ssd/NMW-TexasTech/reference_imgs
VIZIER_SITE=vizier.cds.unistra.fr
GAIA_DR2_CLIENT=vizquery (lib/vizquery -> VizieR vizier.cds.unistra.fr)
INFO: MAKE_PNG_PLOTS is set to yes
FITS_FILE_EXT=fits
CALIBRATION_STATUS_PREFIX=
Fields in the data directory: 
UMi-02-Q2b1x1
#######################################
########### Starting UMi-02-Q2b1x1 ###########
Processing UMi-02-Q2b1x1
server tau has sufficient free disk space available: 433406 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 433406 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Small preview (one of the new images): 

Large previews of the second-epoch (new) images:

MAKE_PNG_PLOTS=yes


renamed 'UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.png' -> 'transient_report/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits_preview.png'

UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits


renamed 'UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.png' -> 'transient_report/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits_preview.png'

UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits




Read-check the input FITS images... read-check OK
Blank image check the input FITS images... blank-image-check OK
Read date check the input FITS images... read-date-check OK
Mean value check the input FITS images... OK, at least two new images have mean values below the threshold.
----------------------------------------------
INFO: REFERENCE_EPOCH__FIRST_IMAGE_MEAN_VALUE= 522.6192
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 519.1383
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1639.0980
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 323.8153
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1649.2650
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 326.8545
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 3.13631
INFO:                  SECOND_EPOCH__SD_ratio= 0.009
INFO: the new-to-reference mean image value ratio check is disabled (DISABLE_NEW_TO_REF_MEAN_IMG_RATIO_CHECK=yes) - expected with a background-subtracted reference image
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.4699993133545 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-08T04:46:51.2391019' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-08T09:46:51.2391019' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61260.4075374883 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-08T09:47:01.1435665' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61260.4076521182 / Modified Julian Date of averaged midpoint" status=0
Record 16: "XBINNING=                    1 / X axis binning factor" status=0
Record 17: "YBINNING=                    1 / Y axis binning factor" status=0
Record 18: "GAIN    =                   30 / Sensor gain" status=0
Record 19: "OFFSET  =                   30 / Sensor gain offset" status=0
Record 20: "XPIXSZ  =                 3.76 / [um] Pixel X axis size" status=0
Record 21: "YPIXSZ  =                 3.76 / [um] Pixel Y axis size" status=0
Record 22: "INSTRUME= 'QHY600M'            / Imaging instrument name" status=0
Record 23: "CAMERAID= 'QHY600M-84137c4dbbbd119a9' / Imaging instrument identifier" status=0
Record 24: "SET-TEMP=                  0.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -0.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0'             / Sensor readout mode" status=0
Record 27: "USBLIMIT=                   50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-TTU2'       / Name of telescope" status=0
Record 29: "FOCALLEN=                135.0 / [mm] Focal length" status=0
Record 30: "FOCRATIO=                  2.2 / Focal ratio" status=0
Record 31: "RA      =     216.002762747704 / [deg] RA of telescope" status=0
Record 32: "DEC     =     70.0001648152638 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     16.5911111111111 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     348.319166666667 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     3.46319436776324 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'UMi-02'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '14 24 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+70 00 00'          / [D M S] Declination of imaged object" status=0
Record 48: "OBJCTROT=                  0.0 / [deg] planned rotation of imaged object" status=0
Record 49: "FOCNAME = 'ZWO Focuser'        / Focusing equipment name" status=0
Record 50: "FOCPOS  =                20457 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20457 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.4699993133545 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.4699993133545 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 56: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 67: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/d_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits :)

Spent 0.475222 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/d_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388  16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits :)


No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.2800006866455 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-08T04:48:19.1011094' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-08T09:48:19.1011094' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61260.4085544096 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-08T09:48:29.0048628' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =      61260.408669028 / Modified Julian Date of averaged midpoint" status=0
Record 16: "XBINNING=                    1 / X axis binning factor" status=0
Record 17: "YBINNING=                    1 / Y axis binning factor" status=0
Record 18: "GAIN    =                   30 / Sensor gain" status=0
Record 19: "OFFSET  =                   30 / Sensor gain offset" status=0
Record 20: "XPIXSZ  =                 3.76 / [um] Pixel X axis size" status=0
Record 21: "YPIXSZ  =                 3.76 / [um] Pixel Y axis size" status=0
Record 22: "INSTRUME= 'QHY600M'            / Imaging instrument name" status=0
Record 23: "CAMERAID= 'QHY600M-84137c4dbbbd119a9' / Imaging instrument identifier" status=0
Record 24: "SET-TEMP=                  0.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -0.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0'             / Sensor readout mode" status=0
Record 27: "USBLIMIT=                   50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-TTU2'       / Name of telescope" status=0
Record 29: "FOCALLEN=                135.0 / [mm] Focal length" status=0
Record 30: "FOCRATIO=                  2.2 / Focal ratio" status=0
Record 31: "RA      =     216.002762998263 / [deg] RA of telescope" status=0
Record 32: "DEC     =     70.0001648489349 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     16.5294444444444 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     348.434444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     3.47544012246608 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'UMi-02'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '14 24 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+70 00 00'          / [D M S] Declination of imaged object" status=0
Record 48: "OBJCTROT=                  0.0 / [deg] planned rotation of imaged object" status=0
Record 49: "FOCNAME = 'ZWO Focuser'        / Focusing equipment name" status=0
Record 50: "FOCPOS  =                20457 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20457 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.2800006866455 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.2800006866455 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 56: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 67: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/d_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits :)

Spent 0.464694 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/d_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388  16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits :)


No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Dark frame used to calibrate the second-epoch images:



Flat field used to calibrate the second-epoch images:



after the calibration attempt:
SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Previews of the CALIBRATED second-epoch images:


fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits



fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits




Updating neverexclude_list.txt
'/var/www/nmw_calibration/neverexclude_list.txt' -> './neverexclude_list.txt'
Choosing bad regions list
'/var/www/nmw_calibration/TTUQ2b1x1/TTUQ2_bad_region.lst' -> 'bad_region.lst'
wait
*------ default.sex.telephoto_lens_onlybrightstars_v1 ------*
'default.sex.telephoto_lens_onlybrightstars_v1' -> 'default.sex'
Starting VaST with default.sex.telephoto_lens_onlybrightstars_v1

  ./vast --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
  
SExtractor catalog cache: saved UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.cat to cache
SExtractor catalog cache: saved UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_onlybrightstars_v1
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Checking WCS cache directory local_wcs_cache
Checking WCS cache directory /mnt/usb/NMW_NG/solved_reference_images
Found WCS cache directory /mnt/usb/NMW_NG/solved_reference_images
Checking WCS cache directory /home/NMW_web_upload/solved_reference_images
Checking WCS cache directory /dataX/kirx/NMW_NG_rt3_autumn2019/solved_reference_images
The reference JD(UT) for computing planet and comet positions: 2461260.90765323
Re-using ../asassn_transients_list.txt
'../asassn_transients_list.txt' -> 'asassn_transients_list.txt'
Re-using ../tocp_transients_list.txt
'../tocp_transients_list.txt' -> 'tocp_transients_list.txt'
Re-using ../tns_transients_list.txt
'../tns_transients_list.txt' -> 'tns_transients_list.txt'
Plate-solving the images
wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits exists and is non-empty
Saving wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits to local_wcs_cache/
'wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits' -> 'local_wcs_cache/wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits'
wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits exists and is non-empty
Saving wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits to local_wcs_cache/
'wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits' -> 'local_wcs_cache/wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits'
wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits exists and is non-empty
Saving wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits to local_wcs_cache/
'wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits' -> 'local_wcs_cache/wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits'
wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits exists and is non-empty
Saving wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits to local_wcs_cache/
'wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits' -> 'local_wcs_cache/wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits'
###################################
# fov_of_wcs_calibrated_image.sh output for wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits (1st reference image)
verification OK: wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Image size: 937.5'x624.3'  15.6(deg)x10.4(deg)  9576x6388 pix
Image scale: 5.87"/pix along the X axis and 5.86"/pix along the Y axis
Image center: 14:24:01.593 +69:59:33.71 J2000 4789.000 3195.000 
###################################
The image scale is 5.87"/pix, setting the soft and hard astrometric limits for filtering second-epoch detections: 5.9" and 8.8"
###################################
# fov_of_wcs_calibrated_image.sh output for wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits (1st new image)
verification OK: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Image size: 937.4'x624.8'  15.6(deg)x10.4(deg)  9576x6388 pix
Image scale: 5.87"/pix along the X axis and 5.87"/pix along the Y axis
Image center: 14:24:06.169 +69:59:57.86 J2000 4789.000 3195.000 
###################################
###################################
# Check the image center offset between the reference and the first second-epoch image (pointing accuracy)
Reference image center 14:24:01.593 +69:59:33.71
Second-epoch image center 14:24:06.169 +69:59:57.86
Angular distance between the image centers 0.0094 deg.
Soft limit: 0.50 deg.  Hard limit: 1.00 deg.
###################################
###################################
# fov_of_wcs_calibrated_image.sh output for wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits (2nd new image)
verification OK: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Image size: 937.4'x624.8'  15.6(deg)x10.4(deg)  9576x6388 pix
Image scale: 5.87"/pix along the X axis and 5.87"/pix along the Y axis
Image center: 14:24:07.022 +69:59:03.86 J2000 4789.000 3195.000 
###################################
###################################
# Check the image center offset between the reference and the second second-epoch image (pointing accuracy)
Reference image center 14:24:01.593 +69:59:33.71
Second-epoch image center 14:24:07.022 +69:59:03.86
Angular distance between the image centers 0.0113 deg.
###################################
###################################
# Check the image center offset between the first and the second second-epoch image (shift should be applied between the second-epoch images)
Second-epoch first image center  14:24:06.169 +69:59:57.86
Second-epoch second image center 14:24:07.022 +69:59:03.86
Angular distance between the image centers 0.01505 deg.
###################################
Running solve_plate_with_UCAC5...
Preparing for a parallel run
Running  util/solve_plate_with_UCAC5 --no_photometric_catalog --iterations 2  /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits &> /tmp/tmp.WCHfZE7M63
Parallel run for /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Running  util/solve_plate_with_UCAC5 --no_photometric_catalog --iterations 2  /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits &> /tmp/tmp.CoPrmUQBFw
Parallel run for /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Running  util/solve_plate_with_UCAC5 --no_photometric_catalog --iterations 2  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits &> /tmp/tmp.ssuHnlcAoS
Parallel run for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Running  util/solve_plate_with_UCAC5 --no_photometric_catalog --iterations 2  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits &> /tmp/tmp.FMznWwsAV8
Parallel run for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Calibrating the magnitude scale
Found non-empty wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
____ Start of magnitude calibration ____
PHOTOMETRIC_CALIBRATION=TYCHO2_V
Calibrating the magnitude scale with Tycho-2 stars
util/transients/transient_factory_test31.sh is checking for the presence of non-empty wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits and wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat 
wait (drain background util/solve_plate_with_UCAC5 jobs before Tycho-2 calibration -- avoids wcs_.fits write race)
Tycho-2 catalog is found at lib/catalogs/tycho2
Tycho-2 catalog and the derived bright star exclusion list are ready
Checking for the presence of non-empty wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits and wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat 
Found non-empty wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits and wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat
The reference image (wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits) and catalog (wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat) found
'wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat' -> 'wcsmag.cat'
Read 7945 stars from the SExtractor catalog wcsmag.cat
Detected star coordinate range: RA 187.9719 to 243.8628 deg, Dec +63.6716 to +75.2389 deg
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.00
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.01
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.02
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.03
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.04
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.05
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.06
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.07
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.08
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.09
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.10
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.11
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.12
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.13
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.14
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.15
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.16
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.17
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.18
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.19
Tycho-2 catalog search boundaries: RA 187.9719 to 243.8628 deg, Dec 63.6716 to 75.2389 deg
Loaded 8088 Tycho-2 stars within the image boundaries (VT and BT non-zero).
Relation between the catalog and instrumental magnitudes is written to calib.txt
Stars used for magnitude calibration (good matches): 4821 out of 4988 total matches.
Matched with Tycho-2 4988 out of 7945 detected stars.
The calibration function type and coefficients are written to calib.txt_param
util/calibrate_magnitude_scale 0.000000 1.000000 22.724700
a=0.000000 b=1.000000 c=22.724700
From vast_summary.log: estimated ref. image limiting mag.:  -7.53
Updating vast_summary.log: Estimated ref. image limiting mag.:  15.19

Updated vast_limiting_magnitude.log with calibrated magnitudes
Working...
Please, PLEASE, be patient!!!
All lightcurves processed!  =)
Estimated ref. image limiting mag.:  15.19

Lightcurve magnitude calibration plot:


Preparing per-reference-image forced-photometry calibration (method=tycho2 band=V)
Read 7945 stars from the SExtractor catalog wcsmag.cat
Detected star coordinate range: RA 187.9719 to 243.8628 deg, Dec +63.6716 to +75.2389 deg
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.00
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.01
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.02
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.03
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.04
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.05
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.06
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.07
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.08
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.09
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.10
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.11
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.12
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.13
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.14
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.15
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.16
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.17
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.18
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.19
Tycho-2 catalog search boundaries: RA 187.9719 to 243.8628 deg, Dec 63.6716 to 75.2389 deg
Loaded 8088 Tycho-2 stars within the image boundaries (VT and BT non-zero).
Relation between the catalog and instrumental magnitudes is written to calib.txt
Stars used for magnitude calibration (good matches): 4821 out of 4988 total matches.
Matched with Tycho-2 4988 out of 7945 detected stars.
util/calibrate_single_image_with_tycho2.sh: calibrated wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits via Tycho-2

Single-image forced-photometry magnitude calibration plot for wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits:


Forced-photometry filter: reusing the VaST-run aperture from image00001.cat.aperture for wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Forced-photometry filter: calibrated wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits -> calib.txt_param_ref_wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits (aperture=6.3)
Read 7905 stars from the SExtractor catalog wcsmag.cat
Detected star coordinate range: RA 187.9736 to 243.8628 deg, Dec +63.6717 to +75.2223 deg
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.00
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.01
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.02
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.03
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.04
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.05
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.06
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.07
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.08
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.09
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.10
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.11
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.12
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.13
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.14
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.15
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.16
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.17
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.18
Reading Tycho2 catalog file lib/catalogs/tycho2/tyc2.dat.19
Tycho-2 catalog search boundaries: RA 187.9736 to 243.8628 deg, Dec 63.6717 to 75.2223 deg
Loaded 8080 Tycho-2 stars within the image boundaries (VT and BT non-zero).
Relation between the catalog and instrumental magnitudes is written to calib.txt
Stars used for magnitude calibration (good matches): 4832 out of 4997 total matches.
Matched with Tycho-2 4997 out of 7905 detected stars.
util/calibrate_single_image_with_tycho2.sh: calibrated wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits via Tycho-2

Single-image forced-photometry magnitude calibration plot for wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits:


Forced-photometry filter: reusing the VaST-run aperture from image00002.cat.aperture for wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Forced-photometry filter: calibrated wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits -> calib.txt_param_ref_wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits (aperture=6.3)
____ End of magnitude calibration ____
Applying consolidated magnitude filters...
Preparing the exclusion lists for this field
Done with filtering
Found 0 candidate transients before the final filtering.  (Hard limit: 10000)
Median FWHM seeing for isolated stars:
 2.4 pix  UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
 2.4 pix  UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
 2.1 pix  fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
 2.2 pix  fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Limiting magnitude estimates:
 15.2 mag.  UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
 15.2 mag.  UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
 12.8 mag.  fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
 13.3 mag.  fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
All-image limiting magnitude estimate:  12.8 (SNR )  10.4 (80% of stars)  with default.sex.telephoto_lens_onlybrightstars_v1
The first estimate is the magnitude of a star detected with a signal-to-noise ratio of  following Karpov (2025, Acta Polytechnica, 65, 50). 
This value should be representative of the faintest stars clearly visible in the image. 
The brighter of the limiting magnitude estimates for the two second-epoch images is reported here.
The second estimate is the 80th percentile of the magnitude distribution of stars detected on all four images.
This value is representative of the faintest object that may enter the candidate transients list.
The hard cut-off for the candidate transients is 15.5 mag.
Waiting for UCAC5 plate solver
wait
############ /tmp/tmp.WCHfZE7M63 (6) ############
Parsing command line arguments...
The guess is based on the existing WCS header.
Trying to blindly solve the plate (local solve-field or remote server)...
/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/util/wcs_image_calibration.sh /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits 570.0
Entering WCS image calibration mode.
ORIGINAL_FITSFILE=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
FITSFILE before on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
verification OK: /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
It's a known telescope with plate solutions that are supposed to be good.
The input image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits has a WCS header - will blindly trust it is good...
'/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits' -> 'wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits'
This WCS solution (astrometrynet) will be kept as is, not refit by util/solve_plate_with_UCAC5
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
WCS_IMAGE_NAME=wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
WCS-calibrated image found: wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Checking if the catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat corresponding to the image wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits alredy exist and is non-empty...
Catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat corresponding to the image wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits found.
The catalog is in the new format, as expected.
The plate-solved (WCS-calibrated) image is saved to wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
util/solve_plate_with_UCAC5 is preparing to read a catalog corresponding to the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
WCS catalog name: wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat 
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
SExtractor catalog parsing summary: zero_flux=0, no_flux_err=0, no_mag=0, no_mag_err=0, low_SNR=0, blended=497, bad_region=1747, passed=7945
Got 7945 stars (including 5791 good ones) from the SExtractor catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat 
util/solve_plate_with_UCAC5 got 7945 stars from the SExtractor catalog
Updated FoV from the plate-solved image: 937.5'
Seting catalog search parameters based on the expected field of view 937.5 arcmin
UCAC5 catalog search parameters:
                    catalog_search_parameters->search_radius_deg= 0.013021 (46.9 arcsec)
                    catalog_search_parameters->brightest_mag= 1.00
                    catalog_search_parameters->faintest_mag= 13.50
                    catalog_search_parameters->search_radius_second_step_deg 0.010417 (37.5 arcsec)

ITERATION 01 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 768 to 828 (Dec 63.7 to 75.2)
Done reading UCAC5 zone files...
Matched 4901 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 4893 matched stars entering correct_measured_positions(), 4893 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.32" 
Removing outliers...
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 4893 matched stars entering correct_measured_positions(), 6565 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.32" 

ITERATION 02 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 768 to 828 (Dec 63.7 to 75.2)
Done reading UCAC5 zone files...
Matched 4901 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Accuracy estimation diagnostic: 4893 matched stars entering correct_measured_positions(), 6565 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.34" 
Accuracy estimation diagnostic: 4893 matched stars entering correct_measured_positions(), 6565 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.34" 
Excluding outliers - 4893 stars left (next iteration limit 5382)
Stop iterations.


 The field is successfully solved and matched with the astrometric catalog! :)

SIP_REFIT: util/identify.sh trusts the WCS of wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits (astrometrynet) - keeping it, no refit (set VAST_FORCE_SIP_REFIT=1 to refit anyway)
WCS_QUALITY_DIAG: file=UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits N_match=4893 sigma_overall_arcsec=0.363 sigma_q1_arcsec=0.332 sigma_q2_arcsec=0.358 sigma_q3_arcsec=0.394 sigma_q4_arcsec=0.383 n_q1=1741 n_q2=835 n_q3=1536 n_q4=781 worst_quadrant_to_overall_ratio=1.088
The image catalog is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat.ucac5
The DS9 region file with the matched stars is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat.ds9.reg
You may view it with the command:
 ds9 /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits -region wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat.ds9.reg
The astrometric residuals vector field is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat.astrometric_residuals
Option '-n' not using photometric catalogs, just stick with astrometry
opt '-i': 2 is the maximum number of iterations
############ /tmp/tmp.CoPrmUQBFw (6) ############
Parsing command line arguments...
The guess is based on the existing WCS header.
Trying to blindly solve the plate (local solve-field or remote server)...
/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/util/wcs_image_calibration.sh /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits 570.0
Entering WCS image calibration mode.
ORIGINAL_FITSFILE=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
FITSFILE before on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
verification OK: /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
It's a known telescope with plate solutions that are supposed to be good.
The input image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits has a WCS header - will blindly trust it is good...
'/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits' -> 'wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits'
This WCS solution (astrometrynet) will be kept as is, not refit by util/solve_plate_with_UCAC5
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
WCS_IMAGE_NAME=wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
WCS-calibrated image found: wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Checking if the catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat corresponding to the image wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits alredy exist and is non-empty...
Catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat corresponding to the image wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits found.
The catalog is in the new format, as expected.
The plate-solved (WCS-calibrated) image is saved to wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
util/solve_plate_with_UCAC5 is preparing to read a catalog corresponding to the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
WCS catalog name: wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat 
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
SExtractor catalog parsing summary: zero_flux=0, no_flux_err=0, no_mag=0, no_mag_err=0, low_SNR=0, blended=492, bad_region=1720, passed=7905
Got 7905 stars (including 5780 good ones) from the SExtractor catalog wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat 
util/solve_plate_with_UCAC5 got 7905 stars from the SExtractor catalog
Updated FoV from the plate-solved image: 937.4'
Seting catalog search parameters based on the expected field of view 937.4 arcmin
UCAC5 catalog search parameters:
                    catalog_search_parameters->search_radius_deg= 0.013019 (46.9 arcsec)
                    catalog_search_parameters->brightest_mag= 1.00
                    catalog_search_parameters->faintest_mag= 13.50
                    catalog_search_parameters->search_radius_second_step_deg 0.010416 (37.5 arcsec)

ITERATION 01 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 768 to 828 (Dec 63.7 to 75.2)
Done reading UCAC5 zone files...
Matched 4897 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 4888 matched stars entering correct_measured_positions(), 4888 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.32" 
Removing outliers...
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 4888 matched stars entering correct_measured_positions(), 6551 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.33" 

ITERATION 02 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 768 to 828 (Dec 63.7 to 75.2)
Done reading UCAC5 zone files...
Matched 4897 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Accuracy estimation diagnostic: 4888 matched stars entering correct_measured_positions(), 6551 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.34" 
Accuracy estimation diagnostic: 4888 matched stars entering correct_measured_positions(), 6551 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.35" 
Excluding outliers - 4888 stars left (next iteration limit 5376)
Stop iterations.


 The field is successfully solved and matched with the astrometric catalog! :)

SIP_REFIT: util/identify.sh trusts the WCS of wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits (astrometrynet) - keeping it, no refit (set VAST_FORCE_SIP_REFIT=1 to refit anyway)
WCS_QUALITY_DIAG: file=UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits N_match=4888 sigma_overall_arcsec=0.362 sigma_q1_arcsec=0.318 sigma_q2_arcsec=0.377 sigma_q3_arcsec=0.401 sigma_q4_arcsec=0.390 n_q1=1726 n_q2=841 n_q3=1532 n_q4=789 worst_quadrant_to_overall_ratio=1.107
The image catalog is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat.ucac5
The DS9 region file with the matched stars is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat.ds9.reg
You may view it with the command:
 ds9 /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits -region wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat.ds9.reg
The astrometric residuals vector field is written to wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat.astrometric_residuals
Option '-n' not using photometric catalogs, just stick with astrometry
opt '-i': 2 is the maximum number of iterations
############ /tmp/tmp.ssuHnlcAoS (6) ############
Parsing command line arguments...
The minor axis of the CCD chip should be 24.0 mm based on the derived pixel size of 3.8 um
Internal estimated FoV 605.3'
The guess is based on the FOCALLEN keyword.
Trying to blindly solve the plate (local solve-field or remote server)...
/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/util/wcs_image_calibration.sh /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits 605.0
Entering WCS image calibration mode.
ORIGINAL_FITSFILE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
FITSFILE before on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
verification OK: /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
It's not one of the telescopes that are know to produce images with good WCS solutions - will try to re-solve!
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
WCS_IMAGE_NAME=wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
WCS-calibrated image found: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Checking if the catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat corresponding to the image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits alredy exist and is non-empty...
Catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat corresponding to the image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits found.
The catalog is in the new format, as expected.
The plate-solved (WCS-calibrated) image is saved to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
util/solve_plate_with_UCAC5 is preparing to read a catalog corresponding to the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
WCS catalog name: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat 
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
SExtractor catalog parsing summary: zero_flux=0, no_flux_err=0, no_mag=0, no_mag_err=0, low_SNR=0, blended=43, bad_region=69, passed=929
Got 929 stars (including 817 good ones) from the SExtractor catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat 
util/solve_plate_with_UCAC5 got 929 stars from the SExtractor catalog
Updated FoV from the plate-solved image: 937.4'
Seting catalog search parameters based on the expected field of view 937.4 arcmin
UCAC5 catalog search parameters:
                    catalog_search_parameters->search_radius_deg= 0.013019 (46.9 arcsec)
                    catalog_search_parameters->brightest_mag= 1.00
                    catalog_search_parameters->faintest_mag= 13.50
                    catalog_search_parameters->search_radius_second_step_deg 0.010416 (37.5 arcsec)

ITERATION 01 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 767 to 828 (Dec 63.6 to 75.3)
Done reading UCAC5 zone files...
Matched 797 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 794 matched stars entering correct_measured_positions(), 777 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.38" 
Removing outliers...
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 794 matched stars entering correct_measured_positions(), 846 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.38" 

ITERATION 02 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 767 to 828 (Dec 63.6 to 75.3)
Done reading UCAC5 zone files...
Matched 797 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Accuracy estimation diagnostic: 795 matched stars entering correct_measured_positions(), 848 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.39" 
Accuracy estimation diagnostic: 795 matched stars entering correct_measured_positions(), 848 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.39" 
Excluding outliers - 795 stars left (next iteration limit 873)
Stop iterations.


 The field is successfully solved and matched with the astrometric catalog! :)

SIP_REFIT: the 795 catalog matches do not cover the frame (486/136/158/15 per quadrant, need 49 in each) - keeping the original solution
WCS_QUALITY_DIAG: file=fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits N_match=795 sigma_overall_arcsec=0.445 sigma_q1_arcsec=0.377 sigma_q2_arcsec=0.559 sigma_q3_arcsec=0.474 sigma_q4_arcsec=0.872 n_q1=486 n_q2=136 n_q3=158 n_q4=15 worst_quadrant_to_overall_ratio=1.961
The image catalog is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat.ucac5
The DS9 region file with the matched stars is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat.ds9.reg
You may view it with the command:
 ds9 /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits -region wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat.ds9.reg
The astrometric residuals vector field is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat.astrometric_residuals
Option '-n' not using photometric catalogs, just stick with astrometry
opt '-i': 2 is the maximum number of iterations
############ /tmp/tmp.FMznWwsAV8 (6) ############
Parsing command line arguments...
The minor axis of the CCD chip should be 24.0 mm based on the derived pixel size of 3.8 um
Internal estimated FoV 605.3'
The guess is based on the FOCALLEN keyword.
Trying to blindly solve the plate (local solve-field or remote server)...
/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/util/wcs_image_calibration.sh /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits 605.0
Entering WCS image calibration mode.
ORIGINAL_FITSFILE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
FITSFILE before on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
verification OK: /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
It's not one of the telescopes that are know to produce images with good WCS solutions - will try to re-solve!
FITSFILE after on_the_fly=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
WCS_IMAGE_NAME=wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
WCS-calibrated image found: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Checking if the catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat corresponding to the image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits alredy exist and is non-empty...
Catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat corresponding to the image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits found.
The catalog is in the new format, as expected.
The plate-solved (WCS-calibrated) image is saved to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
util/solve_plate_with_UCAC5 is preparing to read a catalog corresponding to the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
WCS catalog name: wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat 
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
SExtractor catalog parsing summary: zero_flux=0, no_flux_err=0, no_mag=0, no_mag_err=0, low_SNR=0, blended=35, bad_region=65, passed=847
Got 847 stars (including 749 good ones) from the SExtractor catalog wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat 
util/solve_plate_with_UCAC5 got 847 stars from the SExtractor catalog
Updated FoV from the plate-solved image: 937.4'
Seting catalog search parameters based on the expected field of view 937.4 arcmin
UCAC5 catalog search parameters:
                    catalog_search_parameters->search_radius_deg= 0.013019 (46.9 arcsec)
                    catalog_search_parameters->brightest_mag= 1.00
                    catalog_search_parameters->faintest_mag= 13.50
                    catalog_search_parameters->search_radius_second_step_deg 0.010416 (37.5 arcsec)

ITERATION 01 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 767 to 828 (Dec 63.6 to 75.2)
Done reading UCAC5 zone files...
Matched 728 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 726 matched stars entering correct_measured_positions(), 711 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.38" 
Removing outliers...
Correcting the measured astrometric positions...
Accuracy estimation diagnostic: 726 matched stars entering correct_measured_positions(), 767 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.38" 

ITERATION 02 -- talking to VizieR, this might be slow!
UCAC5 search strategy: trying local copy first
Found a local copy of UCAC5
UCAC5 local query limit 5000: matching up to 5000 detected stars, deepening the UCAC5 window to mag 15.50
Reading UCAC5 zone files...
Searching UCAC5 zones 767 to 828 (Dec 63.6 to 75.2)
Done reading UCAC5 zone files...
Matched 728 stars with the local copy of UCAC5.
The local UCAC5 search seems to be a success
Accuracy estimation diagnostic: 726 matched stars entering correct_measured_positions(), 766 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.37" 
Accuracy estimation diagnostic: 726 matched stars entering correct_measured_positions(), 766 with non-zero local correction accuracy
Estimated accuracy of the plate solution: 0.37" 
Excluding outliers - 726 stars left (next iteration limit 798)
Stop iterations.


 The field is successfully solved and matched with the astrometric catalog! :)

SIP_REFIT: the 726 catalog matches do not cover the frame (492/104/121/9 per quadrant, need 45 in each) - keeping the original solution
WCS_QUALITY_DIAG: file=fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits N_match=726 sigma_overall_arcsec=0.414 sigma_q1_arcsec=0.374 sigma_q2_arcsec=0.603 sigma_q3_arcsec=0.511 sigma_q4_arcsec=0.546 n_q1=492 n_q2=104 n_q3=121 n_q4=9 worst_quadrant_to_overall_ratio=1.456
The image catalog is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat.ucac5
The DS9 region file with the matched stars is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat.ds9.reg
You may view it with the command:
 ds9 /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits -region wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat.ds9.reg
The astrometric residuals vector field is written to wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat.astrometric_residuals
Option '-n' not using photometric catalogs, just stick with astrometry
opt '-i': 2 is the maximum number of iterations
###################################
# Pre-local-correction WCS quality summary (see WCS_QUALITY_DIAG lines above)
ref1=UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits sigma_overall=0.363 worst_q_ratio=1.088
ref2=UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits sigma_overall=0.362 worst_q_ratio=1.107
new1=fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits sigma_overall=0.445 worst_q_ratio=1.961
new2=fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits sigma_overall=0.414 worst_q_ratio=1.456
reference average sigma_overall=0.3625 worst_q_ratio=1.0975
warn-on-ratio threshold: 2.0x reference
###################################

Astrometric residual vector field (catalog-matched stars):

plot_astrometric_residuals_xy.py: wrote wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659_astrometric_residuals.png (4893 matched stars from wcs_UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.wcscat.astrometric_residuals, image 9576x6388, median residual 0.32 arcsec)


plot_astrometric_residuals_xy.py: wrote wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660_astrometric_residuals.png (4888 matched stars from wcs_UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.wcscat.astrometric_residuals, image 9576x6388, median residual 0.33 arcsec)


plot_astrometric_residuals_xy.py: wrote wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273_astrometric_residuals.png (795 matched stars from wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits.wcscat.astrometric_residuals, image 9576x6388, median residual 0.37 arcsec)


plot_astrometric_residuals_xy.py: wrote wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274_astrometric_residuals.png (726 matched stars from wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits.wcscat.astrometric_residuals, image 9576x6388, median residual 0.37 arcsec)


Copying WCS-calibrated images back to input directory
Saving fully-calibrated image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
INFO: FPACK_FULLY_CALIBRATED_IMAGE=no (not compressing the image)
'wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits' -> '/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits'
Saving fully-calibrated image wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
INFO: FPACK_FULLY_CALIBRATED_IMAGE=no (not compressing the image)
'wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits' -> '/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/wcs_fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits'
Preparing the HTML report for the field UMi-02-Q2b1x1 with default.sex.telephoto_lens_onlybrightstars_v1
No candidates found here
Prepared the HTML report for the field UMi-02-Q2b1x1 with default.sex.telephoto_lens_onlybrightstars_v1
*------ done with default.sex.telephoto_lens_onlybrightstars_v1 ------*
#### The local exclusion list is exclusion_list_local.txt ####
wait
*------ default.sex.telephoto_lens_vSTL ------*
'default.sex.telephoto_lens_vSTL' -> 'default.sex'
Starting VaST with default.sex.telephoto_lens_vSTL

  ./vast --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
  
Last  image: 2461260.90765323 08.08.2026 09:46:51.239 UTC
WARNING: VaST exited with code 1 on the field UMi-02-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

Parsing command line arguments...
opt 'F': Will NOT create flag images for SExtractor
opt '5': 5.000000 pix is the new fixed star matching radius!
opt 'b': Using 500 reference stars for image matching!
opt '3': Will try to select best aperture for each source!
opt 'y': 0 SysRem iterations will be conducted!
opt 't 4': robust linear magnitude calibration (vary zero-point and slope)
opt 'x': 99 is the maximum acceptable SExtractor flag!
WARNING: disabling the mag-size filter in order not to reject blended stars.
opt 'u': Stick with UTC time system, no conversion to TT will be done!
opt 'f': Run ./find_candidates manually!
opt 'k': "JD" keyword in FITS image header will be ignored!
INFO from vast_remove_directory(): Could not open directory: symlinks_to_images
INFO from vast_remove_directory(): Could not open directory: converted_images
INFO from vast_remove_directory(): Could not open directory: unpacked_images

Checking the list of input images specified on the command line ...

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM)...  OK
Found a system-wide installation of SExtractor
Cleaning old outNNNNN.dat files.
Done with cleaning!

 VaST was started with the following command line: 
./vast --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits 


Preparing to process 4 input FITS images...


######## Forcing special settings for the transient detection ########
transient search mode: disabling the mag-size filter as it should be switched off when running a transient search!
transient search mode: disabling the bad image filter as it will not help during the transient search!
transient search mode: will not try to gues image saturation limit
transient search mode: no UTC-to-TT time system conversion will be performed!!!
transient search mode: setting the maximum acceptable SExtractor flag to 3
transient search mode: disabling rejectin of images with elliptical stars
transient search mode: not discarding large sources
################
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
Setting the fixed star match radius of 5.00 pix
We have 4 images to process.
SExtractor catalog cache: restored UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits catalog from cache
SExtractor catalog cache: restored UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits catalog from cache
Running SExtractor in 3 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
Parent process says: we are done fork()ing.
Waiting for thread 2 to finish...
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
The above guess is based on the non-default gain value specified in default.sex by user
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
The above guess is based on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00004.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.2,5.6,6.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.2,5.7,6.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits


Done with SExtractor!

TIMING SExtractor: 3 seconds


Matching stars between images!

No manually selected comparison stars file manually_selected_comparison_stars.lst which is fine.
Processing  /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-19T08:48:47.4361653
Setting observation time using DATE-OBS keyword: 2026-04-19T08:48:47.4361653

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-19T08:48:47.436
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
Exposure 20 sec, 19.04.2026 08:48:47.436 UTC = JD(UTC) 2461149.86733143 mid. exp.
The reference image star  8319.634    26.017 is rejected, see bad_region.lst
The reference image star  9222.086    28.702 is rejected, see bad_region.lst
The reference image star  7859.269    21.536 is rejected, see bad_region.lst
The reference image star  7946.386    18.126 is rejected, see bad_region.lst
The reference image star  8330.174    13.854 is rejected, see bad_region.lst
The reference image star  9471.113    15.429 is rejected, see bad_region.lst
The reference image star  9473.811    14.262 is rejected, see bad_region.lst
The reference image star  8664.291    14.725 is rejected, see bad_region.lst
The reference image star  7972.118     9.140 is rejected, see bad_region.lst
The reference image star  8500.098     8.199 is rejected, see bad_region.lst
Excluding more reference image stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 34645, (34643 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 13
 * rejected inside rectangles defined in bad_region.lst: 6627
 * rejected close to frame edge: 162
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.9 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 80
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.

Please note: the CCD position-dependent magnitude correction will be applied.
get_detection_limit_sn(): Detection limit: -7.26
Detection limit from the magnitude-SNR relation= -7.3  (5.0 sigma detection)
The simple faintest star detection limit= -6.7
80 percent brightest stars detection limit= -7.8
Selected detection limit= -7.8
Final detection limit= -7.8 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.04.9 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 87
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
    34511 * detected, using  498/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.014403, number_of_ambiguous_matches=499 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=32121 inliers=32121 rms 0.58 -> 0.58 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.013220, number_of_ambiguous_matches=458 
32117 * matched, [CVPOLY iter 2: order=1 pairs=32117 inliers=32117 rms 0.56 -> 0.56 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.007822, number_of_ambiguous_matches=271 
32101 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=32101 inliers=32101 rms 0.50 -> 0.50 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.003088, number_of_ambiguous_matches=107 
32086 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.009
    34511 stars detected, 32086 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 30591, N_manually_selected_comparison_stars = 0
Using 30591 stars for magnitude calibration (before filtering).
Iteratively removing outliers from the linear mag-mag relation (unweighted fit)...
After removing outliers in (X,Y,dm) plane, we are left with 30588 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix -0.00000*Y_pix +0.00387
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 29108 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.26
    37070 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  217312 kB used, 257764 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:46:51.2391019
Setting observation time using DATE-OBS keyword: 2026-08-08T09:46:51.2391019

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:46:51.239
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
The star  9044.208    16.410 is rejected, see bad_region.lst
The star  9046.036    15.095 is rejected, see bad_region.lst
The star  8874.372     6.453 is rejected, see bad_region.lst
The star  7573.190    24.750 is rejected, see bad_region.lst
The star  8190.338    24.734 is rejected, see bad_region.lst
The star  8606.858    42.399 is rejected, see bad_region.lst
The star  8002.213    34.420 is rejected, see bad_region.lst
The star  7661.258    47.892 is rejected, see bad_region.lst
The star  7576.415    50.809 is rejected, see bad_region.lst
The star  8677.983    69.999 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 6404
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 1
 * rejected inside rectangles defined in bad_region.lst: 318
 * rejected close to frame edge: 29
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 32
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     6404 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000189, number_of_ambiguous_matches=7 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=6217 inliers=6217 rms 0.57 -> 0.30 pix, max corner correction 10.1 pix] fraction_of_ambiguous_matches= 0.000162, number_of_ambiguous_matches=6 
6218 * matched, [CVPOLY iter 2: order=1 pairs=6218 inliers=6218 rms 0.31 -> 0.31 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000054, number_of_ambiguous_matches=2 
6216 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=6216 inliers=6216 rms 0.25 -> 0.25 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000054, number_of_ambiguous_matches=2 
6212 * matched (3rd iteration). Success!
  rotation [degrees] =   1.655
     6404 stars detected,  6212 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 5636, N_manually_selected_comparison_stars = 0
Using 5636 stars for magnitude calibration (before filtering).
Iteratively removing outliers from the linear mag-mag relation (unweighted fit)...
After removing outliers in (X,Y,dm) plane, we are left with 4844 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00010*X_pix +0.00023*Y_pix -0.68201
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 4844 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.61
 ERROR!!! Magnitude calibration failure. Dropping image. 
    37070 objects stored in memory (1000000 max.)
memory:  215184 kB used, 257764 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:48:19.1011094
Setting observation time using DATE-OBS keyword: 2026-08-08T09:48:19.1011094

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:48:19.101
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
The star  9044.050     6.542 is rejected, see bad_region.lst
The star  9045.265     5.163 is rejected, see bad_region.lst
The star  7572.802    14.200 is rejected, see bad_region.lst
The star  8606.719    32.309 is rejected, see bad_region.lst
The star  8002.342    24.914 is rejected, see bad_region.lst
The star  7661.269    38.102 is rejected, see bad_region.lst
The star  8677.922    59.936 is rejected, see bad_region.lst
The star  8675.261    66.143 is rejected, see bad_region.lst
The star  9108.957    68.066 is rejected, see bad_region.lst
The star  8707.075    83.880 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 5961
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 325
 * rejected close to frame edge: 30
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 37
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     5961 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000324, number_of_ambiguous_matches=12 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=5709 inliers=5709 rms 0.77 -> 0.47 pix, max corner correction 10.9 pix] fraction_of_ambiguous_matches= 0.000351, number_of_ambiguous_matches=13 
5708 * matched, [CVPOLY iter 2: order=1 pairs=5708 inliers=5708 rms 0.45 -> 0.45 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000216, number_of_ambiguous_matches=8 
5702 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=5702 inliers=5702 rms 0.32 -> 0.32 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000027, number_of_ambiguous_matches=1 
5699 * matched (3rd iteration). Success!
  rotation [degrees] =   1.693
     5961 stars detected,  5699 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 5166, N_manually_selected_comparison_stars = 0
Using 5166 stars for magnitude calibration (before filtering).
Iteratively removing outliers from the linear mag-mag relation (unweighted fit)...
After removing outliers in (X,Y,dm) plane, we are left with 4185 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00013*X_pix +0.00029*Y_pix -0.79873
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 4185 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.61
 ERROR!!! Magnitude calibration failure. Dropping image. 
    37070 objects stored in memory (1000000 max.)
memory:  215176 kB used, 257764 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 69156 (69156 measurements stored in RAM)
Freeing up some memory...  Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 1 seconds
The lightcurve files have been written, freeing up more memory...
Creating vast_image_details.log ... 

Writing summary file: vast_summary.log ...  OK
Selecting the best aperture for each source
Aperture with index 0 (REFERENCE_APERTURE_DIAMETER +0.00*REFERENCE_APERTURE_DIAMETER) seems best for  5919 stars
Aperture with index 1 (REFERENCE_APERTURE_DIAMETER +0.00*REFERENCE_APERTURE_DIAMETER) seems best for     0 stars
Aperture with index 2 (REFERENCE_APERTURE_DIAMETER -0.10*REFERENCE_APERTURE_DIAMETER) seems best for  9001 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  5527 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  3989 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  7650 stars

done!  =)
TIMING select_aperture: 1 seconds
Computing lightcurve statistics...  Will not compute variability indexes for objects having <1 points in lightcurve
You may disable this by commenting out the line '#define DROP_LIGHTCURVES_WITH_SMALL_NUMBER_OF_POINTS_FROM_ALL_PLOTS' in src/vast_limits.h an re-compiling VaST with 'make'

Computing, please wait a bit
...............................................................................................................................................................................................................................................................................................................................
vast_lightcurve_statistics.log: 31909 objects, the longest string is 383 bytes.
Allocating memory for resorting the file.



----***** VaST processing WARNING *****----
You asked VaST to process 4 images, but only 1 were actually matched to the reference one.
Please investigate this!



**************************************************************
This error might be a bug, but it is far more likely that it is caused by 
inappropriate input data. A few simple things to check in the diagnostic
messages printed above (or the vast*.log files):
 * How many of the input images are matched?
 * Does the number of detected stars on each image look reasonable?
 * Do images have a sufficient overlap of at least about 20 percent?

You may run
 ./sextract_single_image /path/to/my/image/file.fit
to see how well VaST detects stars with the current SExtractor settings
(star detection settings can be changed in the default.sex configuration
file, see various examples in the VaST directory).

If you cannot identify the problem, please e-mail Kirill Sokolovsky 
Please try to describe the problem in details and, if possible, attach vast_summary.log
file and a few example images. If the images are too big to be sent by e-mail, please 
upload them through a web-form http://scan.sai.msu.ru/upload/
**************************************************************

Low percentage of matched images - we'll declare this an unsuccessful VaST run (exit code 1)
_____________________
SExtractor catalog cache: saved UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits.cat to cache
SExtractor catalog cache: saved UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
Last  image: 2461260.90765323 08.08.2026 09:46:51.239 UTC
ERROR running VaST on the field UMi-02-Q2b1x1 (less than 4 images processed)
exp_start= 19.04.2026 08:48:47.436  exp=   20.000  JD= 2461149.86733143  ap=  4.9  rotation=   0.000  *detected= 34645  *matched= 34645  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-48-47_20.00sec_-4.90C_LIGHT_0659.fits
exp_start= 19.04.2026 08:49:38.883  exp=   20.000  JD= 2461149.86792689  ap=  4.9  rotation=  -0.009  *detected= 34511  *matched= 32086  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/UMi-02-Q2b1x1_2026-04-19_03-49-38_20.00sec_-4.90C_LIGHT_0660.fits
exp_start= 08.08.2026 09:46:51.239  exp=   20.000  JD= 2461260.90765323  ap=  4.7  rotation=   1.655  *detected=  6404  *matched=  6212  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-46-51_20.00sec_-0.00C_LIGHT_0273.fits
exp_start= 08.08.2026 09:48:19.101  exp=   20.000  JD= 2461260.90867015  ap=  4.7  rotation=   1.693  *detected=  5961  *matched=  5699  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_UMi-02-Q2b1x1_044929_TTUQ2b1x1_880040_Tc1Ew6nM/fd_UMi-02-Q2b1x1_2026-08-08_04-48-19_20.00sec_-0.00C_LIGHT_0274.fits
########### Completed UMi-02-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO  ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is V36
############################################################
Positions of planets computed with util/planet_finder/main.py for JD(UT)2461260.90765323 -observatory V36
07:58:46.23 +20:20:03.2 Mercury (-0.6mag)
12:03:26.75 -01:08:08.5 Venus (-4.3mag)
05:49:49.06 +23:36:31.5 Mars (1.3mag)
08:43:06.64 +18:40:40.6 Jupiter (-1.8mag)
00:56:24.40 +03:15:15.6 Saturn (0.6mag)
04:11:45.24 +20:57:00.9 Uranus (5.8mag)
00:16:05.41 +00:13:04.6 Neptune (7.7mag)
20:28:07.38 -23:30:15.3 Pluto (14.4mag)
05:01:34.52 +27:21:32.1 Moon (-9.6mag)
-rw-r--r-- 1 apache apache 362 Aug  8 04:51 planets.txt
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT)2461260.90765323:
08:43:05.65 +18:40:44.7 Io (6.0mag)
08:43:17.10 +18:39:56.0 Europa (6.3mag)
08:43:23.82 +18:39:26.4 Ganymede (5.6mag)
08:43:14.51 +18:40:10.9 Callisto (6.8mag)
08:40:40.13 +18:40:10.0 Himalia (15.7mag)
08:43:06.96 +18:40:39.6 Thebe (16.6mag)
08:40:12.22 +18:38:39.4 Elara (17.7mag)
08:47:13.64 +18:20:03.3 Pasiphae (17.9mag)
08:46:16.77 +18:50:59.4 Carme (19.0mag)
00:56:13.30 +03:15:34.6 Titan (8.4mag)
00:56:28.72 +03:15:01.5 Rhea (9.7mag)
00:56:34.27 +03:14:02.2 Iapetus (11.1mag)
00:56:09.99 +03:15:06.8 Hyperion (14.4mag)
00:55:46.59 +03:08:25.0 Phoebe (16.5mag)
-rw-r--r-- 1 apache apache 568 Aug  8 04:52 moons.txt
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT)2461260.90765323:
19:03:18.78 -22:54:56.3 JWST
16:03:42.16 +48:18:38.9 Chandra
11:15:49.74 -60:13:29.4 XMM-Newton
-rw-r--r-- 1 apache apache 96 Aug  8 04:51 spacecraft.txt
############################################################
Positions of bright comets computed with util/comet_finder/main.py for JD(UT)2461260.90765323 -observatory V36
03:13:53.92 +17:23:39.4 17.6mag P/1996 R2 (Lagerkvist)
18:01:44.22 -34:37:38.5 14.0mag P/2010 H2 (Vales)
06:53:57.76 -68:54:25.7 17.3mag C/2014 UN271 (Bernardinelli-Bernstein)
06:09:52.35 +32:59:50.2 17.7mag C/2017 K2 (PANSTARRS)
03:44:18.68 +37:45:02.0 16.8mag P/2021 N1 (ZTF)
22:38:29.16 +31:26:20.8 17.3mag C/2022 E2 (ATLAS)
06:43:40.56 +26:32:18.0 16.8mag C/2022 N2 (PANSTARRS)
10:21:44.33 +28:27:40.2 17.0mag C/2022 QE78 (ATLAS)
09:28:59.17 +05:18:07.4 17.9mag C/2022 R6 (PANSTARRS)
15:12:29.66 -12:17:30.8 17.9mag P/2023 B1 (PANSTARRS)
21:10:29.37 +65:59:52.6 17.9mag C/2023 H5 (Lemmon)
15:47:38.56 -12:57:14.1 14.4mag C/2023 R1 (PANSTARRS)
08:08:18.71 +31:21:15.6 15.3mag C/2024 E1 (Wierzchos)
15:06:55.19 +15:36:33.9 17.7mag C/2024 G6 (ATLAS)
19:02:53.23 +43:05:49.7 13.7mag C/2024 J3 (ATLAS)
21:10:27.46 +49:13:17.0 17.6mag C/2024 R4 (PANSTARRS)
05:15:17.61 -12:57:56.1 15.5mag C/2024 T5 (ATLAS)
06:56:21.59 +24:07:28.8 17.9mag C/2025 J1 (Borisov)
07:30:54.28 -16:09:53.8 17.8mag C/2025 R3 (PANSTARRS)
10:33:08.87 +20:53:41.3 17.3mag C/2025 V2 (Rankin)
12:58:13.95 +02:20:19.3 17.0mag C/2025 Y1 (ATLAS)
16:03:00.91 +77:48:59.8 16.8mag C/2026 A2 (Bok)
03:07:34.54 +46:11:30.7 17.1mag C/2026 B2 (Sun-Gao)
11:46:56.29 +08:34:09.8 17.3mag A/2026 E1
21:58:33.01 -27:22:53.0 6.9mag 10P/Tempel
11:29:04.02 -03:24:34.7 16.3mag 29P/Schwassmann-Wachmann
04:39:28.95 +32:27:54.2 18.0mag 47P/Ashbrook-Jackson
11:08:04.26 +04:34:51.9 17.3mag 63P/Wild
00:54:12.88 -05:27:18.7 15.4mag 65P/Gunn
05:35:58.85 +20:41:52.4 13.7mag 78P/Gehrels
20:37:48.02 -23:32:49.0 17.8mag 84P/Giclas
03:00:56.55 +13:42:26.5 16.7mag 88P/Howell
07:56:23.56 +27:38:15.3 16.2mag 93P/Lovas
04:06:50.09 +16:56:37.8 17.6mag 112P/Urata-Niijima
05:57:06.45 +30:17:48.5 16.3mag 114P/Wiseman-Skiff
09:18:56.63 +26:37:13.9 15.0mag 123P/West-Hartley
11:44:05.07 -10:20:24.3 17.1mag 124P/Mrkos
05:36:50.46 +21:10:51.3 16.1mag 128P/Shoemaker-Holt
06:28:50.80 +18:53:36.8 17.9mag 131P/Mueller
00:03:22.51 +03:24:23.9 17.6mag 139P/Vaisala-Oterma
03:20:10.95 -19:10:40.1 13.8mag 161P/Hartley-IRAS
07:16:49.74 +37:49:02.1 15.8mag 162P/SidingSpring
15:09:47.99 +40:59:48.4 12.2mag 169P/NEAT
02:43:22.11 +09:31:05.0 17.6mag 220P/McNaught
16:41:40.31 -10:06:06.5 17.7mag 235P/LINEAR
20:22:13.82 -52:50:10.4 17.8mag 259P/Garradd
03:22:39.56 +25:15:03.6 15.4mag 260P/McNaught
07:05:56.98 +37:42:53.0 17.3mag 295P/LINEAR
15:10:31.54 +03:07:09.0 17.7mag 391P/Kowalski
09:01:03.51 +18:22:03.2 17.9mag 450P/LONEOS
-rw-r--r-- 1 apache apache 2.5K Aug  8 04:51 comets.txt
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
00:56:54.35 -35:55:29.40  AT2026wdy  2026-08-5.05 16.08
22:08:07.63 -53:03:58.90  AT2026wek  2026-08-3.82 17.17
14:51:51.34 +66:13:24.60  ASASSN-26ev  2026-08-2.15 14.02
12:06:50.79 -36:16:06.20  SN2026wgm  2026-08-1.73 15.61
16:56:36.90 -59:29:26.00  ASASSN-26er  2026-07-25.82 15.09
01:21:27.83 -10:37:05.00  SN2026vbh  2026-07-25.61 15.97
21:17:31.59 +22:25:50.90  ASASSN-26eq  2026-07-24.37 15.13
18:53:36.89 +16:56:43.60  ASASSN-26ep  2026-07-23.47 -4.06
12:18:47.98 -30:48:47.50  ASASSN-26et  2026-07-22.76 13.98
13:00:47.82 +15:42:17.60  SN2026uwk  2026-07-21.75 16.38
18:52:31.11 -32:28:00.90  ASASSN-26en  2026-07-21.77 14.63
14:42:58.01 -62:32:59.10  ASASSN-26es  2026-07-20.79 15.36
20:12:45.57 -32:53:13.00  ASASSN-26em  2026-07-20.94 16.83
18:54:24.33 -46:11:51.70  ASASSN-26eu  2026-07-20.93 14.86
03:18:56.99 -80:55:10.40  AT2026ugi  2026-07-20.03 17.12
18:43:58.40 +24:22:41.80  ASASSN-26eo  2026-07-19.36 16.16
04:50:01.03 -02:22:33.80  ASASSN-26ej  2026-07-16.17 17.02
18:34:55.28 -31:41:00.90  ASASSN-26ek  2026-07-16.24 15.73
17:07:43.61 -44:21:53.50  ASASSN-26el  2026-07-15.86 16.01
14:45:08.35 +24:13:12.30  ASASSN-26ei  2026-07-16.17 16.46
10:00:46.44 -32:36:31.10  AT 2023mhb  2026-07-14.73 16.67
14:39:37.45 -11:22:36.20  AT 2026unl  2026-07-15.27 17.11
10:49:42.57 -11:25:55.80  ASASSN-26eh  2026-07-14.72 16.58
19:33:53.06 -07:15:00.80  ASASSN-22le  2026-07-14.15 15.5
02:45:40.52 -27:55:30.30  ASASSN-26ef  2026-07-12.35 15.86
23:26:43.80 +04:42:39.70  SN 2026qtn  2026-07-12.22 16.47
02:19:17.26 +28:57:15.40  ASASSN-26ec  2026-07-11.53 2.78
18:31:15.56 -05:34:31.50  AT2026stb  2026-07-11.28 -1.29
13:36:08.24 +23:29:05.00  AT2026pjf  2026-07-10.18 -0.72
17:33:39.82 +04:22:36.70  SN2026pir  2026-07-9.86 -0.66
11:21:41.26 -50:33:36.30  ASASSN-26ed  2026-07-8.8 -1.3
23:41:42.11 +26:29:49.10  AT2026qil  2026-07-9.3 16.15
20:21:30.50 -32:03:40.10  ASASSN-26ee  2026-07-7.22 15.53
19:37:44.09 -05:35:42.80  AT2026ryu  2026-07-7.17 14.88
11:06:55.46 -04:07:04.50  AT2026qqg  2026-07-5.01 16.82
19:07:23.69 -74:13:37.30  AT2026qly  2026-07-5.02 17.31
17:57:43.80 +27:18:40.10  ASASSN-26ea  2026-07-5.07 16.67
19:59:01.43 -32:07:34.30  ASASSN-26eb  2026-07-4.97 15.52
18:46:50.35 -57:44:13.20  SN 2026qqp  2026-07-5.03 -0.92
19:17:31.69 -39:55:29.90  ASASSN-26dz  2026-07-5.14 15.91
19:14:31.37 +12:03:52.90  AT 2026rdg  2026-07-3.43 11.81
04:05:50.09 -70:24:34.40  AT 2026qpr  2026-06-30.4 15.96
13:45:37.49 -05:59:35.80  SN 2026pub  2026-06-30.09 16.01
16:41:15.63 +39:17:14.70  SN 2026pel  2026-06-26.38 16.07
10:14:40.19 -35:38:21.30  ASASSN-26dy  2026-06-25.99 15.63
14:47:21.56 -40:15:51.30  ASASSN-26dv  2026-06-23.03 14.62
13:38:49.79 -77:21:06.70  ASASSN-26dw  2026-06-23.04 16.09
00:59:27.90 +33:08:13.20  SN 2026mke  2026-06-22.39 17.13
11:10:44.73 -30:20:45.50  SN 2026nmv  2026-06-22.06 16.56
21:36:15.68 -21:19:12.50  AT2026oxh  2026-06-22.15 17.14
17:31:38.38 -56:05:51.90  ASASSN-26dx  2026-06-22.02 14.72
14:10:13.44 -38:46:46.10  AT2026pvk  2026-06-22.06 16.53
20:56:47.23 -18:31:05.20  AT2026plb  2026-06-21.31 16.4
15:44:29.68 +21:00:59.30  SN2026ore  2026-06-21.29 17.57
23:50:05.98 -14:01:41.30  AT2026oxl  2026-06-21.52 17.64
17:36:54.73 -18:10:04.20  AT2026ouj  2026-06-20.92 15.15
00:34:04.08 -30:22:09.20  AT2026ntk  2026-06-18.09 17.34
20:49:13.39 +25:17:59.20  ASASSN-26du  2026-06-15.39 15.93
23:09:30.84 +32:40:42.00  SN2026oxc  2026-06-14.35 16.83
02:02:26.67 +32:04:22.70  AT2026ovz  2026-06-14.6 15.52
21:26:28.11 -72:31:19.50  AT2026nwc  2026-06-11 17.05
17:54:57.33 +26:32:34.20  SN 2026odc  2026-06-11.23 17.62
13:55:59.94 +17:30:37.20  SN 2026nyq  2026-06-11.1 16.24
00:50:45.14 -71:38:36.90  ASASSN-26dt  2026-06-11.13 10.22
14:42:19.73 +19:11:35.60  SN2026nyp  2026-06-10.3 16.32
12:23:23.92 +12:56:43.50  SN2026mta  2026-06-8.29 16.69
12:30:18.51 +47:12:33.20  SN2026oao  2026-06-9.32 17.02
10:51:05.21 -42:28:56.60  AT2026nvf  2026-06-8.12 16.75
13:50:22.48 -07:35:00.00  SN2026npn  2026-06-8.02 17.58
00:56:07.17 +43:01:43.20  ASASSN-26dq  2026-06-7.43 13.58
01:07:49.46 +41:59:43.70  SN 2026obc  2026-06-7.43 15.15
21:11:25.22 +14:14:31.90  ASASSN-26dr  2026-06-7.24 16.24
06:21:27.06 -65:16:42.00  ASASSN-26ds  2026-06-2.97 15.02
20:07:38.15 -21:07:05.40  SN2026mho  2026-05-25.18 -1.12
11:29:42.55 +79:01:03.10  AT2026min  2026-05-24.21 16.63
11:44:33.11 -68:48:32.90  ASASSN-26no  2026-05-24.03 8.35
19:00:42.82 -48:31:01.60  ASASSN-26dp  2026-05-22.31 -3.28
14:23:56.59 -58:37:47.40  ASASSN-26dn  2026-05-20.01 14.59
11:24:54.06 +47:57:01.60  AT2026nma  2026-05-20.29 15.46
21:27:08.58 +33:24:38.10  AT2026lli  2026-05-19.34 15.86
00:31:01.41 -13:38:51.70  AT2026nad  2026-05-19.39 15.34
15:16:06.61 -79:16:32.40  ASASSN-26dm  2026-05-19.03 14.44
11:24:25.21 -59:23:19.10  ASASSN-26dl  2026-05-18.02 13.55
13:45:51.52 -53:16:01.00  ASASSN-26dk  2026-05-18.16 12.96
02:05:49.69 -30:29:09.60  ASASSN-26dh  2026-05-18.43 15.37
17:50:22.87 -39:42:33.90  ASASSN-26dj  2026-05-17.05 15.7
01:13:11.60 -33:25:16.10  ASASSN-26dg  2026-05-13.41 16.8
16:44:31.77 -27:15:18.40  AT2026mhn  2026-05-12.33 15.8
09:46:31.08 -33:41:51.00  ASASSN-26di  2026-05-12.14 14.63
21:23:11.57 -19:09:45.00  AT2026kwu  2026-05-12.26 16.9
14:20:14.30 -30:20:51.90  AT2026ktm  2026-05-12.06 17.21
14:41:39.01 -37:13:46.40  AT2026lkm  2026-05-11.18 16.89
12:59:50.45 -10:58:38.80  SN2026kep  2026-05-9.06 17.5
13:37:29.61 -29:50:30.90  AT2026lkd  2026-05-9.09 17.23
09:46:42.01 -14:52:03.60  SN2026kmo  2026-05-8.99 17.51
15:03:05.28 +22:02:03.40  AT2026lxf  2026-05-8.07 13.88
10:23:49.41 -20:57:25.30  ASASSN-26df  2026-05-8.21 16.52
22:14:40.56 +05:04:51.60  2026lda  2026-05-7.56 16.2
21:35:33.81 -14:05:16.30  ASASSN-26de  2026-05-6.29 14.51
16:21:49.13 -61:36:14.60  ASASSN-26dd  2026-05-5.15 15.93
-rw-r--r-- 1 apache apache 5.7K Aug  8 04:51 asassn_transients_list.txt
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
12:24:25.10 +28:47:12.0  TCP J12242510+2847120  2026-05-31.6015  14.8mag
00:56:07.13 +43:01:40.6  TCP J00560713+4301406  2026-06-01.4135  12.2mag
00:42:41.64 +41:15:16.2  PNV J00424164+4115162  2026-06-02.029  17.4mag
00:42:38.68 +41:15:58.2  PNV J00423868+4115582  2026-06-05.1224  19.97Umag
19:00:42.95 -48:31:01.7  PNV J19004295-4831017  2026-05-25.0752  14.2mag
09:55:21.28 +69:02:52.6  PNV J09552128+6902526  2026-06-13.933  18.9mag
19:51:21.42 +37:06:40.0  TCP J19512142+3706400  2026-06-17.2942  16.8mag
19:57:03.87 +37:41:46.4  TCP J19570387+3741464  2026-06-18.2638  17.5mag
00:42:32.04 +41:10:28.3  PNV J00423204+4110283  2026-06-26.059  16.6mag
02:19:17.36 +28:57:15.8  TCP J02191736+2857158  2026-07-12.3549  12.5mag
00:44:56.43 +41:57:41.6  PNV J00445643+4157416  2026-07-13.8026  17.98Cmag
00:42:55.36 +41:17:27.0  PNV J00425536+4117270  2026-07-20.1813  17.7mag
20:35:43.64 +61:31:32.9  TCP J20354364+6131329  2026-07-20.5443  14.4mag
21:17:31.48 +22:25:51.0  TCP J21173148+2225510  2026-07-23.5577  14.8mag
00:41:24.04 +40:49:02.8  PNV J00412404+4049028  2026-07-25.0157  18.7mag
00:43:04.26 +41:02:28.6  PNV J00430426+4102286  2026-07-26.1512  20mag
14:51:51.40 +66:13:24.0  TCP J14515140+6613240  2026-07-29.2561  13.5mag
00:43:06.15 +41:22:08.2  PNV J00430615+4122082  2026-07-30.0085  19.4mag
00:41:33.23 +41:10:12.2  PNV J00413323+4110122  2026-08-02.8913  17.1mag
05:21:07.63 +23:38:19.4  TCP J05210763+2338194  2026-08-06.4109  11.2mag
-rw-r--r-- 1 apache apache 189K Aug  8 04:51 tocp_transients_list.txt
############################################################
Truncated list of recent TNS transients from https://www.wis-tns.org/ :
15:37:08.700 +38:44:26.60  AT 2026wbo  2026-07-23.30 18.704
00:04:40.454 +39:05:09.86  AT 2026wbn  2026-07-23.47 19.16
02:25:32.556 +38:48:28.92  AT 2026wbm  2026-07-23.59 19.115
22:51:44.755 -38:02:45.30  AT 2026wbl  2026-07-20.67 19.81
20:44:22.102 -30:33:07.61  AT 2026wbk  2026-07-21.57 19.95
23:01:47.698 +07:45:18.42  AT 2026wbj  2026-07-22.08 20.05
02:18:33.999 +27:15:43.54  AT 2026wbi  2026-07-09.48 19.9027
03:20:07.235 +43:11:07.53  AT 2026wbh  2026-07-23.48 20.1395
01:07:56.328 -09:37:45.38  AT 2026wbg  2026-07-23.44 19.5315
22:29:38.203 +06:36:46.40  AT 2026wbf  2026-07-21.40 20.5415
01:30:44.669 +15:51:26.93  AT 2026wbe  2026-07-19.45 20.7428
22:39:50.171 +06:00:50.94  AT 2026wbd  2026-07-19.37 21.1191
01:07:21.614 +01:57:20.97  AT 2026wbc  2026-07-16.45 20.3594
12:03:36.050 -07:15:24.30  AT 2026wbb  2026-02-24.51 20.97
14:19:16.465 +07:27:42.55  AT 2026wba  2026-02-24.60 21.47
15:29:46.957 -05:24:12.45  AT 2026waz  2026-02-28.63 21.17
09:20:38.822 +01:05:52.48  AT 2026way  2026-01-13.46 20.53
11:59:22.501 +33:57:28.65  AT 2026wax  2026-02-12.61 21.19
12:12:58.534 +22:21:29.32  AT 2026waw  2026-01-13.53 21.43
12:50:44.856 -00:38:38.81  AT 2026wav  2026-01-17.62 20.39
-rw-r--r-- 1 apache apache 87K Aug  8 04:51 tns_transients_list.txt

=== Transient Factory Profiling ===
Started: Sat Aug  8 04:51:24 CDT 2026
=======================================
TIMING SExtractor: 1 seconds
TIMING matching_and_photometry: 0 seconds
TIMING lightcurve_write: 1 seconds
TIMING select_aperture: 0 seconds
    VAST_RUN_default.sex.telephoto_lens_onlybrightstars_v1: 2s (0.03 min)
    WCS_CACHE_SETUP: 0s (0.00 min)
    WCS_CALIBRATION_AND_EPHEMERIS: 20s (0.33 min)
    PLATE_VERIFY_AND_POINTING: 0s (0.00 min)
    UCAC5_PLATE_SOLVING: 0s (0.00 min)
    MAGNITUDE_CALIBRATION: 4s (0.07 min)
    MAGCAL_SANITY_CHECK: 0s (0.00 min)
      FILTER_MAGNITUDE_CONSOLIDATED: 0s (0.00 min)
      FILTER_FRAME_EDGE: 0s (0.00 min)
      FILTER_SECOND_EPOCH_VERIFY: 0s (0.00 min)
    CANDIDATE_FILTERING_TOTAL: 0s (0.00 min)
    EXCLUSION_LIST_PREPARATION: 0s (0.00 min)
    SEEING_AND_LIMITING_MAG: 0s (0.00 min)
    WAIT_FOR_UCAC5: 2s (0.03 min)
    WCS_IMAGE_ARCHIVING: 0s (0.00 min)
    HTML_REPORT: 0s (0.00 min)
  SE_CONFIG_default.sex.telephoto_lens_onlybrightstars_v1: 28s (0.47 min)
TIMING SExtractor: 3 seconds
TIMING matching_and_photometry: 1 seconds
TIMING lightcurve_write: 1 seconds
TIMING select_aperture: 1 seconds
    VAST_RUN_default.sex.telephoto_lens_vSTL: 6s (0.10 min)
FIELD_UMi-02-Q2b1x1: 46s (0.77 min)
=======================================
TOTAL_RUNTIME: 62s (1.03 min)
Finished: Sat Aug  8 04:52:26 CDT 2026