FITS images used in this processing run:

Field Lyr-02-Q2b1x1 reference image: Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Field Lyr-02-Q2b1x1 reference image: Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
Field Lyr-02-Q2b1x1 second-epoch image: Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
Field Lyr-02-Q2b1x1 second-epoch image: Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits

WARNING: VaST exited with code 1 on the field Lyr-02-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: 2461176.89547439 16.05.2026 09:29:18.987   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
First image: 2461176.89547439 16.05.2026 09:29:18.987   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Last  image: 2461176.89598403 16.05.2026 09:30:03.020   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.45
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):  15883
Objects passed selection criteria:  15754
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: 17001
Average stars matched: 16464 (96.8414 %)
Memory usage VmPeak:   243620 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Thu Aug  6 15:05:04 CDT 2026
VaST build number  1.0rc89-190-gdf2934b0
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-06)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sat Aug  8 04:57:56 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################
WARNING: VaST exited with code 1 on the field Lyr-02-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_vSTL ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461176.89547439 16.05.2026 09:29:18.987   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
First image: 2461176.89547439 16.05.2026 09:29:18.987   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Last  image: 2461176.89598403 16.05.2026 09:30:03.020   /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.09
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: 14 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):  105192
Objects passed selection criteria:  104648
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: 115482
Average stars matched: 110263 (95.4811 %)
Memory usage VmPeak:   569496 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Thu Aug  6 15:05:04 CDT 2026
VaST build number  1.0rc89-190-gdf2934b0
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-06)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sat Aug  8 04:58:12 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: 
Lyr-02-Q2b1x1
#######################################
########### Starting Lyr-02-Q2b1x1 ###########
Processing Lyr-02-Q2b1x1
server tau has sufficient free disk space available: 432055 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 432055 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.png' -> 'transient_report/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits_preview.png'

Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits


renamed 'Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.png' -> 'transient_report/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits_preview.png'

Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.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= 423.5732
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 721.1220
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1584.1430
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 461.9748
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1597.1266
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 465.9917
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 3.73995
INFO:                  SECOND_EPOCH__SD_ratio= 0.009
INFO: the new-to-reference mean image value ratio check is disabled (DISABLE_NEW_TO_REF_MEAN_IMG_RATIO_CHECK=yes) - expected with a background-subtracted reference image
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.0900001525879 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-08T04:50:57.8293256' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-08T09:50:57.8293256' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61260.4103915393 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-08T09:51:07.7309729' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61260.4105061344 / 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      =     278.179303684626 / [deg] RA of telescope" status=0
Record 32: "DEC     =     37.9999523210247 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     23.9772222222222 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =              300.905 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     2.44873264915003 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Lyr-02'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '18 32 44'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+38 00 00'          / [D M S] Declination of imaged object" status=0
Record 48: "OBJCTROT=                  0.0 / [deg] planned rotation of imaged object" status=0
Record 49: "FOCNAME = 'ZWO Focuser'        / Focusing equipment name" status=0
Record 50: "FOCPOS  =                20457 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20457 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.0900001525879 / [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_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/d_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits :)

Spent 0.453800 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/d_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388  16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits :)


No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
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_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-08T04:52:00.1888246' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-08T09:52:00.1888246' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61260.4111132869 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-08T09:52:10.0935003' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =      61260.411227928 / 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      =     278.179303701605 / [deg] RA of telescope" status=0
Record 32: "DEC     =     37.9999522694727 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =              23.7925 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =                301.0 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =      2.4664062485665 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Lyr-02'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '18 32 44'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+38 00 00'          / [D M S] Declination of imaged object" status=0
Record 48: "OBJCTROT=                  0.0 / [deg] planned rotation of imaged object" status=0
Record 49: "FOCNAME = 'ZWO Focuser'        / Focusing equipment name" status=0
Record 50: "FOCPOS  =                20457 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20457 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     23.0900001525879 / [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_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/d_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits :)

Spent 0.467107 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/d_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388  16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits :)


No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Dark frame used to calibrate the second-epoch images:



Flat field used to calibrate the second-epoch images:



after the calibration attempt:
SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Previews of the CALIBRATED second-epoch images:


fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits



fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
  
Last  image: 2461260.91050728 08.08.2026 09:50:57.829 UTC
WARNING: VaST exited with code 1 on the field Lyr-02-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

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

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

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x)...  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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.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 Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits catalog from cache
SExtractor catalog cache: restored Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.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_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
The above guess is based on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
The above guess is based on the non-default gain value specified in default.sex by user
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00004.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.1,6.1,5.5,6.7,7.3,7.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.1,6.1,5.5,6.7,7.3,7.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.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: 2026-05-16T09:29:18.9878949
Setting observation time using DATE-OBS keyword: 2026-05-16T09:29:18.9878949

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-16T09:29:18.987
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Exposure 20 sec, 16.05.2026 09:29:18.987 UTC = JD(UTC) 2461176.89547439 mid. exp.
The reference image star  8151.594    73.306 is rejected, see bad_region.lst
The reference image star  9262.981    33.512 is rejected, see bad_region.lst
The reference image star  7971.762    27.638 is rejected, see bad_region.lst
The reference image star  8734.975    25.243 is rejected, see bad_region.lst
The reference image star  9369.517    26.404 is rejected, see bad_region.lst
The reference image star  8943.590    24.761 is rejected, see bad_region.lst
The reference image star  8912.900    23.999 is rejected, see bad_region.lst
The reference image star  7687.719    19.530 is rejected, see bad_region.lst
The reference image star  8188.296    15.047 is rejected, see bad_region.lst
The reference image star  8741.122    15.764 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: 17045, (17045 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: 8110
 * rejected close to frame edge: 86
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.3 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'.

Please note: the CCD position-dependent magnitude correction will be applied.
get_detection_limit_sn(): Detection limit: -7.45
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= -10.3
Selected detection limit= -10.3
Final detection limit= -10.3 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.3 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): 7
 * 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'.
    16957 * detected, using  497/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.016720, number_of_ambiguous_matches=285 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=15898 inliers=15898 rms 0.44 -> 0.44 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.008683, number_of_ambiguous_matches=148 
15888 * matched, [CVPOLY iter 2: order=2 pairs=15888 inliers=15888 rms 0.20 -> 0.19 pix, max corner correction 0.2 pix] fraction_of_ambiguous_matches= 0.005632, number_of_ambiguous_matches=96 
15885 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=15885 inliers=15885 rms 0.12 -> 0.12 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.002288, number_of_ambiguous_matches=39 
15883 * matched (3rd iteration). Success!
  rotation [degrees] =   0.003
    16957 stars detected, 15883 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 14434, N_manually_selected_comparison_stars = 0
Using 14434 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 14434 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00108
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 14433 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.45
    18119 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  207836 kB used, 243620 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:50:57.8293256
Setting observation time using DATE-OBS keyword: 2026-08-08T09:50:57.8293256

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:50:57.829
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
The star  7926.364    34.192 is rejected, see bad_region.lst
The star  7756.863    39.615 is rejected, see bad_region.lst
The star  7965.962    90.765 is rejected, see bad_region.lst
The star  7562.672    85.446 is rejected, see bad_region.lst
The star  9159.906    90.015 is rejected, see bad_region.lst
The star  7603.029   100.914 is rejected, see bad_region.lst
The star  8288.140   172.823 is rejected, see bad_region.lst
The star  7512.645   269.505 is rejected, see bad_region.lst
The star  9312.754   339.789 is rejected, see bad_region.lst
The star  7603.098   515.395 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3410
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 98
 * rejected close to frame edge: 22
 * rejected as being too small (<1.5 pix): 0
 * rejected as being too large (>6.1 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): 3
 * 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'.
     3410 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000166, number_of_ambiguous_matches=3 
refining the coordinate transformation... [CVPOLY iter 1: order=2 pairs=1703 inliers=1703 rms 0.88 -> 0.46 pix, max corner correction 4.3 pix] fraction_of_ambiguous_matches= 0.000166, number_of_ambiguous_matches=3 
1701 * matched, [CVPOLY iter 2: order=3 pairs=1701 inliers=1701 rms 0.16 -> 0.14 pix, max corner correction 1.8 pix] fraction_of_ambiguous_matches= 0.000110, number_of_ambiguous_matches=2 
1701 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=1701 inliers=1701 rms 0.14 -> 0.14 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000055, number_of_ambiguous_matches=1 
1701 * matched (3rd iteration). Success!
  rotation [degrees] = -179.588
     3410 stars detected,  1701 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 1313, N_manually_selected_comparison_stars = 0
Using 1313 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 1273 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00021*X_pix +0.00011*Y_pix -1.05271
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 1273 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.91
 ERROR!!! Magnitude calibration failure. Dropping image. 
    18119 objects stored in memory (1000000 max.)
memory:  206760 kB used, 243620 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:52:00.1888246
Setting observation time using DATE-OBS keyword: 2026-08-08T09:52:00.1888246

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:52:00.188
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
The star  7919.272    26.999 is rejected, see bad_region.lst
The star  7749.736    32.319 is rejected, see bad_region.lst
The star  9152.544    82.835 is rejected, see bad_region.lst
The star  7958.850    83.500 is rejected, see bad_region.lst
The star  8281.133   165.762 is rejected, see bad_region.lst
The star  7505.493   262.252 is rejected, see bad_region.lst
The star  9305.493   332.552 is rejected, see bad_region.lst
The star  7595.980   508.137 is rejected, see bad_region.lst
The star  8739.024   531.795 is rejected, see bad_region.lst
The star  8021.942   548.067 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3344
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 97
 * rejected close to frame edge: 18
 * rejected as being too small (<1.5 pix): 0
 * rejected as being too large (>6.1 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'.
     3344 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000166, number_of_ambiguous_matches=3 
refining the coordinate transformation... [CVPOLY iter 1: order=2 pairs=1552 inliers=1552 rms 1.02 -> 0.49 pix, max corner correction 4.6 pix] fraction_of_ambiguous_matches= 0.000166, number_of_ambiguous_matches=3 
1550 * matched, [CVPOLY iter 2: order=3 pairs=1550 inliers=1550 rms 0.17 -> 0.16 pix, max corner correction 2.0 pix] fraction_of_ambiguous_matches= 0.000110, number_of_ambiguous_matches=2 
1550 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=1550 inliers=1550 rms 0.16 -> 0.16 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000055, number_of_ambiguous_matches=1 
1550 * matched (3rd iteration). Success!
  rotation [degrees] = -179.593
     3344 stars detected,  1550 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 1179, N_manually_selected_comparison_stars = 0
Using 1179 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 1129 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00022*X_pix +0.00012*Y_pix -1.08965
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 1129 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.91
 ERROR!!! Magnitude calibration failure. Dropping image. 
    18119 objects stored in memory (1000000 max.)
memory:  206760 kB used, 243620 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 34002 (34002 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  4110 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  4400 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  1998 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  2015 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  3360 stars

done!  =)
TIMING select_aperture: 0 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: 15754 objects, the longest string is 383 bytes.
Allocating memory for resorting the file.



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



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

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

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

Low percentage of matched images - we'll declare this an unsuccessful VaST run (exit code 1)
_____________________
SExtractor catalog cache: saved Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits.cat to cache
SExtractor catalog cache: saved Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Last  image: 2461260.91050728 08.08.2026 09:50:57.829 UTC
ERROR running VaST on the field Lyr-02-Q2b1x1 (less than 4 images processed)
exp_start= 16.05.2026 09:29:18.987  exp=   20.000  JD= 2461176.89547439  ap=  6.3  rotation=   0.000  *detected= 17045  *matched= 17045  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
exp_start= 16.05.2026 09:30:03.020  exp=   20.000  JD= 2461176.89598403  ap=  6.3  rotation=   0.003  *detected= 16957  *matched= 15883  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
exp_start= 08.08.2026 09:50:57.829  exp=   20.000  JD= 2461260.91050728  ap=  6.1  rotation= -179.588  *detected=  3410  *matched=  1701  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
exp_start= 08.08.2026 09:52:00.188  exp=   20.000  JD= 2461260.91122903  ap=  6.1  rotation= -179.593  *detected=  3344  *matched=  1550  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
  
Last  image: 2461260.91050728 08.08.2026 09:50:57.829 UTC
WARNING: VaST exited with code 1 on the field Lyr-02-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

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

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

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x)...  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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.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 Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits catalog from cache
SExtractor catalog cache: restored Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
Parent process says: we are done fork()ing.
Waiting for thread 2 to finish...
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
The above guess is based on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.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)
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
The above guess is baExcluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
sed on the non-default gain value specified in default.sex by user
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  1122.0  1550.0  1124.0  1552.0  (defined in bad_region.lst)
Excluding image region:  1637.0  2824.0  1639.0  2826.0  (defined in bad_region.lst)
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Excluding image region:  1905.0  4570.0  1907.0  4572.0  (defined in bad_region.lst)
Excluding image region:  2012.0  4693.0  2014.0  4695.0  (defined in bad_region.lst)
Excluding image region:  2397.0  4241.0  2399.0  4243.0  (defined in bad_region.lst)
Excluding image region:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00004.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.5,4.5,4.1,5.0,5.4,5.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.5,4.5,4.0,4.9,5.4,5.8 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.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/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.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: 2026-05-16T09:29:18.9878949
Setting observation time using DATE-OBS keyword: 2026-05-16T09:29:18.9878949

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-16T09:29:18.987
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
Exposure 20 sec, 16.05.2026 09:29:18.987 UTC = JD(UTC) 2461176.89547439 mid. exp.
The reference image star  7581.349     1.057 is rejected, see bad_region.lst
The reference image star  7707.333     1.255 is rejected, see bad_region.lst
The reference image star  9031.891     1.331 is rejected, see bad_region.lst
The reference image star  7536.090     1.259 is rejected, see bad_region.lst
The reference image star  7736.295     1.528 is rejected, see bad_region.lst
The reference image star  7836.991     1.188 is rejected, see bad_region.lst
The reference image star  8154.094     1.719 is rejected, see bad_region.lst
The reference image star  8263.400     1.672 is rejected, see bad_region.lst
The reference image star  9299.636     1.806 is rejected, see bad_region.lst
The reference image star  7783.593     2.828 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: 115334, (115334 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 58
 * rejected inside rectangles defined in bad_region.lst: 40247
 * rejected close to frame edge: 473
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 105
 * 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: -7.09
Detection limit from the magnitude-SNR relation= -7.1  (5.0 sigma detection)
The simple faintest star detection limit= -6.4
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:    10.04.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 124
 * 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'.
    115629 * detected, using  501/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.044677, number_of_ambiguous_matches=5166 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=102173 inliers=102173 rms 2.65 -> 0.91 pix, max corner correction 6.1 pix] fraction_of_ambiguous_matches= 0.017876, number_of_ambiguous_matches=2067 
105259 * matched, [CVPOLY iter 2: order=1 pairs=105259 inliers=105259 rms 0.38 -> 0.33 pix, max corner correction 0.5 pix] fraction_of_ambiguous_matches= 0.017911, number_of_ambiguous_matches=2071 
105257 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=105257 inliers=105257 rms 0.33 -> 0.33 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.012886, number_of_ambiguous_matches=1490 
105192 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.004
    115629 stars detected, 105192 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 91913, N_manually_selected_comparison_stars = 0
Using 91913 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 91905 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00231
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 87531 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.10
    125771 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  290960 kB used, 333908 kB peak, 65263848 kB available RAM
Total number of measurements 230963 (230963 measurements stored in RAM)
sorting the measurements cached in memory,
writing lightcurve (outNNNNN.dat) files...
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:50:57.8293256
Setting observation time using DATE-OBS keyword: 2026-08-08T09:50:57.8293256

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:50:57.829
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
The star  7926.363    34.191 is rejected, see bad_region.lst
The star  9087.503    27.991 is rejected, see bad_region.lst
The star  7756.855    39.615 is rejected, see bad_region.lst
The star  9087.193    30.052 is rejected, see bad_region.lst
The star  8084.442    54.821 is rejected, see bad_region.lst
The star  8319.843    69.177 is rejected, see bad_region.lst
The star  7965.962    90.766 is rejected, see bad_region.lst
The star  9159.908    90.016 is rejected, see bad_region.lst
The star  7562.670    85.444 is rejected, see bad_region.lst
The star  7603.023   100.919 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 34694
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 3
 * rejected inside rectangles defined in bad_region.lst: 559
 * rejected close to frame edge: 178
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.5 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): 69
 * 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'.
    34694 * detected, using  150/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.001089, number_of_ambiguous_matches=137 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=17956 inliers=17956 rms 2.50 -> 1.03 pix, max corner correction 5.6 pix] fraction_of_ambiguous_matches= 0.000215, number_of_ambiguous_matches=27 
18562 * matched, [CVPOLY iter 2: order=3 pairs=18562 inliers=18562 rms 0.61 -> 0.22 pix, max corner correction 4.6 pix] fraction_of_ambiguous_matches= 0.000199, number_of_ambiguous_matches=25 
18565 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=18565 inliers=18565 rms 0.21 -> 0.21 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000167, number_of_ambiguous_matches=21 
18564 * matched (3rd iteration). Success!
  rotation [degrees] = -179.638
    34694 stars detected, 18564 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 14279, N_manually_selected_comparison_stars = 0
Using 14279 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 13415 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00024*X_pix +0.00012*Y_pix -1.20723
ERROR in magnitude calibration: fabs(lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 13415 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.56
 ERROR!!! Magnitude calibration failure. Dropping image. 
    125771 objects stored in memory (1000000 max.)
memory:  448436 kB used, 569496 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-08-08T09:52:00.1888246
Setting observation time using DATE-OBS keyword: 2026-08-08T09:52:00.1888246

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-08T09:52:00.188
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
The star  7919.261    27.001 is rejected, see bad_region.lst
The star  9079.899    22.551 is rejected, see bad_region.lst
The star  7749.745    32.322 is rejected, see bad_region.lst
The star  8077.455    47.571 is rejected, see bad_region.lst
The star  8312.631    61.940 is rejected, see bad_region.lst
The star  9152.543    82.837 is rejected, see bad_region.lst
The star  7958.849    83.500 is rejected, see bad_region.lst
The star  7555.398    78.158 is rejected, see bad_region.lst
The star  7595.861    93.654 is rejected, see bad_region.lst
The star  8464.564   151.901 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 33253
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 2
 * rejected inside rectangles defined in bad_region.lst: 618
 * rejected close to frame edge: 189
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.5 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): 89
 * 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'.
    33253 * detected, using  144/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000294, number_of_ambiguous_matches=37 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=16568 inliers=16568 rms 1.19 -> 0.26 pix, max corner correction 7.1 pix] fraction_of_ambiguous_matches= 0.000199, number_of_ambiguous_matches=25 
16584 * matched, [CVPOLY iter 2: order=1 pairs=16584 inliers=16584 rms 0.21 -> 0.21 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000199, number_of_ambiguous_matches=25 
16584 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=16584 inliers=16584 rms 0.21 -> 0.21 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000175, number_of_ambiguous_matches=22 
16583 * matched (3rd iteration). Success!
  rotation [degrees] = -179.597
    33253 stars detected, 16583 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 12641, N_manually_selected_comparison_stars = 0
Using 12641 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 11646 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00025*X_pix +0.00013*Y_pix -1.23280
ERROR in magnitude calibration: fabs(lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 11646 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.57
 ERROR!!! Magnitude calibration failure. Dropping image. 
    125771 objects stored in memory (1000000 max.)
memory:  448436 kB used, 569496 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 4 seconds
Done with measurements! =)

Total number of measurements 230963 (0 measurements stored in RAM)
Freeing up some memory...  Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 0 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 16104 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 30463 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 16800 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 13867 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 27958 stars

done!  =)
TIMING select_aperture: 3 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: 104648 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 Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits.cat to cache
SExtractor catalog cache: saved Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
Last  image: 2461260.91050728 08.08.2026 09:50:57.829 UTC
ERROR running VaST on the field Lyr-02-Q2b1x1 (less than 4 images processed)
exp_start= 16.05.2026 09:29:18.987  exp=   20.000  JD= 2461176.89547439  ap=  4.7  rotation=   0.000  *detected= 115334  *matched= 115334  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-29-18_20.00sec_-0.00C_LIGHT_0299.fits
exp_start= 16.05.2026 09:30:03.020  exp=   20.000  JD= 2461176.89598403  ap=  4.7  rotation=  -0.004  *detected= 115629  *matched= 105192  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Lyr-02-Q2b1x1_2026-05-16_04-30-03_20.00sec_0.00C_LIGHT_0300.fits
exp_start= 08.08.2026 09:50:57.829  exp=   20.000  JD= 2461260.91050728  ap=  4.5  rotation= -179.638  *detected= 34694  *matched= 18564  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-50-57_20.00sec_-0.00C_LIGHT_0277.fits
exp_start= 08.08.2026 09:52:00.188  exp=   20.000  JD= 2461260.91122903  ap=  4.5  rotation= -179.597  *detected= 33253  *matched= 16583  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-08_CI_Lyr-02-Q2b1x1_045531_TTUQ2b1x1_905056_7x8ur87x/fd_Lyr-02-Q2b1x1_2026-08-08_04-52-00_20.00sec_-0.00C_LIGHT_0278.fits
########### Completed Lyr-02-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO  ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is V36
############################################################
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: Sat Aug  8 04:57:25 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: 4s (0.07 min)
TIMING SExtractor: 7 seconds
TIMING matching_and_photometry: 4 seconds
TIMING lightcurve_write: 0 seconds
TIMING select_aperture: 3 seconds
    VAST_RUN_default.sex.telephoto_lens_vSTL: 16s (0.27 min)
FIELD_Lyr-02-Q2b1x1: 31s (0.52 min)
=======================================
TOTAL_RUNTIME: 47s (0.78 min)
Finished: Sat Aug  8 04:58:12 CDT 2026