FITS images used in this processing run:

Field Lyn-03-Q2b1x1 reference image: Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Field Lyn-03-Q2b1x1 reference image: Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
Field Lyn-03-Q2b1x1 second-epoch image: Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
Field Lyn-03-Q2b1x1 second-epoch image: Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits

WARNING: VaST exited with code 1 on the field Lyn-03-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_onlybrightstars_v1 ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461058.75756060 18.01.2026 06:10:43.236   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
First image: 2461058.75756060 18.01.2026 06:10:43.236   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Last  image: 2461082.75576341 11.02.2026 06:08:07.959   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.49
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: 3 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):  7922
Objects passed selection criteria:  7854
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: 12204.5
Average stars matched: 10767.5 (88.2257 %)
Memory usage VmPeak:   238556 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  Fri Aug  7 05:42:34 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################
WARNING: VaST exited with code 1 on the field Lyn-03-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: 2461058.75756060 18.01.2026 06:10:43.236   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
First image: 2461058.75756060 18.01.2026 06:10:43.236   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Last  image: 2461082.75576341 11.02.2026 06:08:07.959   /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.15
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: 12 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):  54993
Objects passed selection criteria:  54758
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: 84321.5
Average stars matched: 73731.5 (87.4409 %)
Memory usage VmPeak:   303012 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  Fri Aug  7 05:42:47 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: 
Lyn-03-Q2b1x1
#######################################
########### Starting Lyn-03-Q2b1x1 ###########
Processing Lyn-03-Q2b1x1
server tau has sufficient free disk space available: 559778 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 559778 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.png' -> 'transient_report/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits_preview.png'

Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits


renamed 'Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.png' -> 'transient_report/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits_preview.png'

Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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= 473.9822
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 639.6008
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 3375.1052
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 831.1164
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 3411.9799
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 864.3805
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 7.12074
INFO:                  SECOND_EPOCH__SD_ratio= 0.038
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 =     23.0900001525879 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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= '2026-08-07T05:04:05.7061819' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-07T10:04:05.7061819' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61259.4195104861 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-07T10:04:15.6073122' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61259.4196250811 / 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      =     107.995859823567 / [deg] RA of telescope" status=0
Record 32: "DEC     =     46.0000845914969 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     15.3977777777778 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     44.5494444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =      3.7171551511394 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / 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  = 'Lyn-03'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '07 12 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+46 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  =                20428 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20428 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.0900001525879 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.0900001525879 / [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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/d_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits :)

Spent 0.467594 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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/d_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.0699996948242 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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= '2026-08-07T05:05:02.8795863' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-07T10:05:02.8795863' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61259.4201722108 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-07T10:05:12.7826401' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61259.4202868287 / 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      =     107.995859722276 / [deg] RA of telescope" status=0
Record 32: "DEC     =      46.000084629173 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     15.5391666666667 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     44.6444444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     3.68508111351217 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / 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  = 'Lyn-03'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '07 12 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+46 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  =                20428 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20428 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.0699996948242 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.0699996948242 / [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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/d_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits :)

Spent 0.471896 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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/d_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
Previews of the CALIBRATED second-epoch images:


fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits



fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
  
Last  image: 2461259.91962623 07.08.2026 10:04:05.706 UTC
WARNING: VaST exited with code 1 on the field Lyn-03-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 ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits is already a symlink and we do not allow symlinks on symlinks
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits is already a symlink and we do not allow symlinks on symlinks

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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb)...  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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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 Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits catalog from cache
SExtractor catalog cache: restored Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
Parent process says: we are done fork()ing.
Waiting for thread 2 to finish...
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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).
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
The above guess is bsex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits > image00003.cat.sex_log 2>&1ased on the non-default gain value specified in default.sex by user

autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.5,6.8,7.4,8.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.8,7.5,8.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits


Done with SExtractor!

TIMING SExtractor: 2 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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.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: 2026-01-18T06:10:43.2361554
Setting observation time using DATE-OBS keyword: 2026-01-18T06:10:43.2361554

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-01-18T06:10:43.236
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Exposure 20 sec, 18.01.2026 06:10:43.236 UTC = JD(UTC) 2461058.75756060 mid. exp.
The reference image star  8159.384    12.090 is rejected, see bad_region.lst
The reference image star  8112.199    10.286 is rejected, see bad_region.lst
The reference image star  8141.946     6.945 is rejected, see bad_region.lst
The reference image star  8857.968     4.469 is rejected, see bad_region.lst
The reference image star  8399.380    21.312 is rejected, see bad_region.lst
The reference image star  7594.188    16.260 is rejected, see bad_region.lst
The reference image star  8469.842    20.805 is rejected, see bad_region.lst
The reference image star  7988.251    18.409 is rejected, see bad_region.lst
The reference image star  8954.196    23.858 is rejected, see bad_region.lst
The reference image star  8547.771    31.661 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: 13613, (13612 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 3116
 * rejected close to frame edge: 71
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.2 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): 1
 * 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: -7.49
Detection limit from the magnitude-SNR relation= -7.5  (5.0 sigma detection)
The simple faintest star detection limit= -9.5
80 percent brightest stars detection limit= -10.4
Selected detection limit= -10.4
Final detection limit= -10.4 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.1 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): 1
 * 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'.
    10796 * detected, using  396/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.005509, number_of_ambiguous_matches=75 
refining the coordinate transformation... [CVPOLY iter 1: order=2 pairs=7928 inliers=7928 rms 0.88 -> 0.37 pix, max corner correction 4.9 pix] fraction_of_ambiguous_matches= 0.002938, number_of_ambiguous_matches=40 
7924 * matched, [CVPOLY iter 2: order=1 pairs=7924 inliers=7924 rms 0.18 -> 0.18 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.002057, number_of_ambiguous_matches=28 
7923 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=7923 inliers=7923 rms 0.14 -> 0.14 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.001249, number_of_ambiguous_matches=17 
7922 * matched (3rd iteration). Success!
  rotation [degrees] = 173.085
    10796 stars detected,  7922 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 7225, N_manually_selected_comparison_stars = 0
Using 7225 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 7224 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00001*X_pix -0.00000*Y_pix +0.07214
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 7213 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.53
    16487 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  204048 kB used, 238556 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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: 2026-08-07T10:04:05.7061819
Setting observation time using DATE-OBS keyword: 2026-08-07T10:04:05.7061819

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-07T10:04:05.706
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
The star  7562.856  2713.528 is rejected, see bad_region.lst
The star  8480.056  2828.179 is rejected, see bad_region.lst
The star  8186.796  2859.686 is rejected, see bad_region.lst
The star  7776.640  2954.004 is rejected, see bad_region.lst
The star  7678.052  3009.341 is rejected, see bad_region.lst
The star  8015.189  3120.324 is rejected, see bad_region.lst
The star  8810.395  3170.530 is rejected, see bad_region.lst
The star  7601.593  3220.879 is rejected, see bad_region.lst
The star  8981.467  3273.067 is rejected, see bad_region.lst
The star  8402.550  3317.210 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 1433
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 94
 * rejected close to frame edge: 5
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.2 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): 0
 * 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'.
     1433 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=1399 inliers=1399 rms 1.50 -> 0.17 pix, max corner correction 18.5 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1399 * matched, [CVPOLY iter 2: order=1 pairs=1399 inliers=1399 rms 0.17 -> 0.17 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1399 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=1399 inliers=1399 rms 0.17 -> 0.17 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1399 * matched (3rd iteration). Success!
  rotation [degrees] =  -2.373
     1433 stars detected,  1399 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 905, N_manually_selected_comparison_stars = 0
Using 905 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 841 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00015*X_pix -0.00005*Y_pix -0.05503
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 841 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.56
 ERROR!!! Magnitude calibration failure. Dropping image. 
    16487 objects stored in memory (1000000 max.)
memory:  203788 kB used, 238556 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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: 2026-08-07T10:05:02.8795863
Setting observation time using DATE-OBS keyword: 2026-08-07T10:05:02.8795863

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-07T10:05:02.879
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
The star  7670.178  1949.660 is rejected, see bad_region.lst
The star  7557.551  2719.765 is rejected, see bad_region.lst
The star  8181.466  2865.877 is rejected, see bad_region.lst
The star  7771.148  2960.323 is rejected, see bad_region.lst
The star  7672.714  3015.606 is rejected, see bad_region.lst
The star  8009.838  3126.573 is rejected, see bad_region.lst
The star  7596.021  3227.230 is rejected, see bad_region.lst
The star  8976.025  3279.209 is rejected, see bad_region.lst
The star  7951.440  3532.048 is rejected, see bad_region.lst
The star  7773.266  3595.442 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 1381
 * rejected as having no flux measurement: 2
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 95
 * rejected close to frame edge: 3
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.2 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): 14
 * 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'.
     1381 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=1339 inliers=1339 rms 2.40 -> 0.42 pix, max corner correction 15.8 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1338 * matched, [CVPOLY iter 2: order=1 pairs=1338 inliers=1338 rms 0.18 -> 0.18 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1338 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=1338 inliers=1338 rms 0.18 -> 0.18 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
1338 * matched (3rd iteration). Success!
  rotation [degrees] =  -2.349
     1381 stars detected,  1338 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 853, N_manually_selected_comparison_stars = 0
Using 853 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 766 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00013*X_pix -0.00005*Y_pix +0.02820
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 766 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.57
 ERROR!!! Magnitude calibration failure. Dropping image. 
    16487 objects stored in memory (1000000 max.)
memory:  203776 kB used, 238556 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 0 seconds
Done with measurements! =)

Total number of measurements 24409 (24409 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  1507 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  2789 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for   852 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for   906 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  1868 stars

done!  =)
TIMING select_aperture: 0 seconds
WARNING: Can't open candidates-transients.lst for reading! -- No candidates found?
Non-zero exit code of lib/transient_list
ERROR running  lib/create_list_of_candidate_transients.sh
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: 7854 objects, the longest string is 384 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 Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits.cat to cache
SExtractor catalog cache: saved Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
Last  image: 2461259.91962623 07.08.2026 10:04:05.706 UTC
ERROR running VaST on the field Lyn-03-Q2b1x1 (less than 4 images processed)
exp_start= 18.01.2026 06:10:43.236  exp=   20.000  JD= 2461058.75756060  ap=  6.2  rotation=   0.000  *detected= 13613  *matched= 13613  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
exp_start= 11.02.2026 06:08:07.959  exp=   20.000  JD= 2461082.75576341  ap=  6.1  rotation= 173.085  *detected= 10796  *matched=  7922  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
exp_start= 07.08.2026 10:04:05.706  exp=   20.000  JD= 2461259.91962623  ap=  6.2  rotation=  -2.373  *detected=  1433  *matched=  1399  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
exp_start= 07.08.2026 10:05:02.879  exp=   20.000  JD= 2461259.92028795  ap=  6.2  rotation=  -2.349  *detected=  1381  *matched=  1338  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
  
Last  image: 2461259.91962623 07.08.2026 10:04:05.706 UTC
WARNING: VaST exited with code 1 on the field Lyn-03-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 ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits is already a symlink and we do not allow symlinks on symlinks
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits is already a symlink and we do not allow symlinks on symlinks

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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb)...  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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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 Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits catalog from cache
SExtractor catalog cache: restored Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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)
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
Excluded a total of 31 image regions  (defined in bad_region.lst).
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits > image00003.cat.sex_log 2>&1Excluding 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_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.6,4.6,4.1,5.0,5.5,5.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.6,4.6,4.2,5.1,5.6,6.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits


Done with SExtractor!

TIMING SExtractor: 7 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/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.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: 2026-01-18T06:10:43.2361554
Setting observation time using DATE-OBS keyword: 2026-01-18T06:10:43.2361554

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-01-18T06:10:43.236
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
Exposure 20 sec, 18.01.2026 06:10:43.236 UTC = JD(UTC) 2461058.75756060 mid. exp.
The reference image star  8547.765    31.663 is rejected, see bad_region.lst
The reference image star  8954.196    23.858 is rejected, see bad_region.lst
The reference image star  8399.376    21.315 is rejected, see bad_region.lst
The reference image star  8469.838    20.807 is rejected, see bad_region.lst
The reference image star  7594.180    16.268 is rejected, see bad_region.lst
The reference image star  8159.381    12.092 is rejected, see bad_region.lst
The reference image star  8735.062    13.547 is rejected, see bad_region.lst
The reference image star  8106.699     6.207 is rejected, see bad_region.lst
The reference image star  8112.194    10.290 is rejected, see bad_region.lst
The reference image star  9267.210     9.928 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: 92470, (92469 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 29
 * rejected inside rectangles defined in bad_region.lst: 15480
 * rejected close to frame edge: 459
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.6 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): 83
 * 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: -7.15
Detection limit from the magnitude-SNR relation= -7.2  (5.0 sigma detection)
The simple faintest star detection limit= -6.5
80 percent brightest stars detection limit= -7.6
Selected detection limit= -7.6
Final detection limit= -7.6 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.04.5 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): 66
 * 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'.
    76173 * detected, using  411/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.008965, number_of_ambiguous_matches=829 
refining the coordinate transformation... [CVPOLY iter 1: order=2 pairs=55024 inliers=55024 rms 0.81 -> 0.31 pix, max corner correction 4.9 pix] fraction_of_ambiguous_matches= 0.008868, number_of_ambiguous_matches=820 
55029 * matched, [CVPOLY iter 2: order=1 pairs=55029 inliers=55029 rms 0.31 -> 0.31 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.008857, number_of_ambiguous_matches=819 
55029 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=55029 inliers=55029 rms 0.31 -> 0.31 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.005537, number_of_ambiguous_matches=512 
54993 * matched (3rd iteration). Success!
  rotation [degrees] = 173.085
    76173 stars detected, 54993 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 49430, N_manually_selected_comparison_stars = 0
Using 49430 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 49423 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00001*X_pix -0.00001*Y_pix +0.05801
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 46676 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.16
    113650 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  264976 kB used, 303012 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.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: 2026-08-07T10:04:05.7061819
Setting observation time using DATE-OBS keyword: 2026-08-07T10:04:05.7061819

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-07T10:04:05.706
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
The star  7576.240    65.772 is rejected, see bad_region.lst
The star  8858.035   242.759 is rejected, see bad_region.lst
The star  7634.203  1054.280 is rejected, see bad_region.lst
The star  8842.999  1331.999 is rejected, see bad_region.lst
The star  7536.443  1327.014 is rejected, see bad_region.lst
The star  1123.000  1550.996 is rejected, see bad_region.lst
The star  7539.940  1555.741 is rejected, see bad_region.lst
The star  7786.338  1590.538 is rejected, see bad_region.lst
The star  7603.086  1707.294 is rejected, see bad_region.lst
The star  7588.681  1729.848 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 14141
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 4
 * rejected inside rectangles defined in bad_region.lst: 630
 * rejected close to frame edge: 78
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.6 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): 41
 * 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'.
    14141 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000748, number_of_ambiguous_matches=85 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=13683 inliers=13683 rms 2.55 -> 0.73 pix, max corner correction 18.0 pix] fraction_of_ambiguous_matches= 0.000044, number_of_ambiguous_matches=5 
13784 * matched, [CVPOLY iter 2: order=3 pairs=13784 inliers=13784 rms 0.27 -> 0.23 pix, max corner correction 1.0 pix] fraction_of_ambiguous_matches= 0.000044, number_of_ambiguous_matches=5 
13784 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=13784 inliers=13784 rms 0.23 -> 0.23 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000044, number_of_ambiguous_matches=5 
13781 * matched (3rd iteration). Success!
  rotation [degrees] =  -2.388
    14141 stars detected, 13781 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 10946, N_manually_selected_comparison_stars = 0
Using 10946 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 9311 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00016*X_pix -0.00005*Y_pix -0.09674
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 9311 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.12
 ERROR!!! Magnitude calibration failure. Dropping image. 
    113650 objects stored in memory (1000000 max.)
memory:  282092 kB used, 303012 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.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: 2026-08-07T10:05:02.8795863
Setting observation time using DATE-OBS keyword: 2026-08-07T10:05:02.8795863

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-07T10:05:02.879
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
The star  8316.372   636.850 is rejected, see bad_region.lst
The star  8842.999  1332.001 is rejected, see bad_region.lst
The star  1123.002  1551.002 is rejected, see bad_region.lst
The star  7598.148  1713.701 is rejected, see bad_region.lst
The star  7583.192  1736.332 is rejected, see bad_region.lst
The star  7597.602  1891.348 is rejected, see bad_region.lst
The star  7913.886  1928.401 is rejected, see bad_region.lst
The star  7670.159  1949.656 is rejected, see bad_region.lst
The star  7590.354  1950.327 is rejected, see bad_region.lst
The star  7939.106  2097.398 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 13400
 * rejected as having no flux measurement: 6
 * rejected as having SNR<3.0: 4
 * rejected inside rectangles defined in bad_region.lst: 620
 * rejected close to frame edge: 90
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.6 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): 56
 * 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'.
    13400 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000132, number_of_ambiguous_matches=15 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=12986 inliers=12986 rms 1.52 -> 0.36 pix, max corner correction 17.5 pix] fraction_of_ambiguous_matches= 0.000070, number_of_ambiguous_matches=8 
13011 * matched, [CVPOLY iter 2: order=1 pairs=13011 inliers=13011 rms 0.26 -> 0.26 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.000070, number_of_ambiguous_matches=8 
13011 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=13011 inliers=13011 rms 0.26 -> 0.26 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000053, number_of_ambiguous_matches=6 
13007 * matched (3rd iteration). Success!
  rotation [degrees] =  -2.386
    13400 stars detected, 13007 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 10298, N_manually_selected_comparison_stars = 0
Using 10298 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 8644 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00015*X_pix -0.00006*Y_pix -0.04194
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 8644 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.13
 ERROR!!! Magnitude calibration failure. Dropping image. 
    113650 objects stored in memory (1000000 max.)
memory:  282092 kB used, 303012 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 168643 (168643 measurements stored in RAM)
Freeing up some memory...  Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 2 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  9019 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 15765 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  7747 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 10044 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 12418 stars

done!  =)
TIMING select_aperture: 2 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: 54758 objects, the longest string is 385 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 Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits.cat to cache
SExtractor catalog cache: saved Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
Last  image: 2461259.91962623 07.08.2026 10:04:05.706 UTC
ERROR running VaST on the field Lyn-03-Q2b1x1 (less than 4 images processed)
exp_start= 18.01.2026 06:10:43.236  exp=   20.000  JD= 2461058.75756060  ap=  4.6  rotation=   0.000  *detected= 92470  *matched= 92470  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-01-18_00-10-43_20.00sec_-15.00C_LIGHT_0258.fits
exp_start= 11.02.2026 06:08:07.959  exp=   20.000  JD= 2461082.75576341  ap=  4.5  rotation= 173.085  *detected= 76173  *matched= 54993  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyn-03-Q2b1x1_2026-02-11_00-08-07_20.00sec_-14.90C_LIGHT_0233.fits
exp_start= 07.08.2026 10:04:05.706  exp=   20.000  JD= 2461259.91962623  ap=  4.6  rotation=  -2.388  *detected= 14141  *matched= 13781  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-04-05_20.00sec_-0.00C_LIGHT_0472.fits
exp_start= 07.08.2026 10:05:02.879  exp=   20.000  JD= 2461259.92028795  ap=  4.6  rotation=  -2.386  *detected= 13400  *matched= 13007  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-07_CI_Lyn-03-Q2b1x1_054017_TTUQ2b1x1_3092411_Fjk0qwSb/fd_Lyn-03-Q2b1x1_2026-08-07_05-05-02_20.00sec_-0.00C_LIGHT_0473.fits
########### Completed Lyn-03-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
############################################################
ls: cannot access 'planets.txt': No such file or directory
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT):
ls: cannot access 'moons.txt': No such file or directory
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT):
ls: cannot access 'spacecraft.txt': No such file or directory
############################################################
ls: cannot access 'comets.txt': No such file or directory
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
ls: cannot access 'asassn_transients_list.txt': No such file or directory
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
ls: cannot access 'tocp_transients_list.txt': No such file or directory

=== Transient Factory Profiling ===
Started: Fri Aug  7 05:42:17 CDT 2026
=======================================
TIMING SExtractor: 2 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: 3s (0.05 min)
TIMING SExtractor: 7 seconds
TIMING matching_and_photometry: 1 seconds
TIMING lightcurve_write: 2 seconds
TIMING select_aperture: 2 seconds
    VAST_RUN_default.sex.telephoto_lens_vSTL: 13s (0.22 min)
FIELD_Lyn-03-Q2b1x1: 28s (0.47 min)
=======================================
TOTAL_RUNTIME: 30s (0.50 min)
Finished: Fri Aug  7 05:42:47 CDT 2026