FITS images used in this processing run:

Field Aur-01-Q2b1x1 reference image: Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Field Aur-01-Q2b1x1 reference image: Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
Field Aur-01-Q2b1x1 second-epoch image: Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
Field Aur-01-Q2b1x1 second-epoch image: Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits

WARNING: VaST exited with code 1 on the field Aur-01-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_onlybrightstars_v1 ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461058.74181476 18.01.2026 05:48:02.795   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
First image: 2461058.74181476 18.01.2026 05:48:02.795   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Last  image: 2461058.74249743 18.01.2026 05:49:01.778   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.54
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: 4 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):  14178
Objects passed selection criteria:  14042
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: 15081.5
Average stars matched: 14636 (97.046 %)
Memory usage VmPeak:   241000 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Fri Aug 14 19:27:11 CDT 2026
VaST build number  1.0rc89-191-g1c132b07
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-14)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sun Aug 16 02:31:02 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################
WARNING: VaST exited with code 1 on the field Aur-01-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_vSTL ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461058.74181476 18.01.2026 05:48:02.795   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
First image: 2461058.74181476 18.01.2026 05:48:02.795   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Last  image: 2461058.74249743 18.01.2026 05:49:01.778   /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.20
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: 28 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):  103385
Objects passed selection criteria:  102927
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: 113616
Average stars matched: 108418 (95.4258 %)
Memory usage VmPeak:   573980 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Fri Aug 14 19:27:11 CDT 2026
VaST build number  1.0rc89-191-g1c132b07
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-14)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Sun Aug 16 02:31:36 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: 
Aur-01-Q2b1x1
#######################################
########### Starting Aur-01-Q2b1x1 ###########
Processing Aur-01-Q2b1x1
server tau has sufficient free disk space available: 918386 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 918386 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.png' -> 'transient_report/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits_preview.png'

Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits


renamed 'Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.png' -> 'transient_report/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits_preview.png'

Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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= 512.4577
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 684.9651
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1680.1576
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 448.5478
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1675.6828
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 448.5001
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 3.27863
INFO:                  SECOND_EPOCH__SD_ratio= 0.000
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 =     26.4099998474121 / [degC] Focuser temperature
AMBTEMP =                 26.3 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
Header: 74 keys total, 33 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= '2026-08-16T02:16:55.8267731' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-16T07:16:55.8267731' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61268.3034239123 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-16T07:17:05.7295268' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61268.3035385301 / 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      =     84.7028858098688 / [deg] RA of telescope" status=0
Record 32: "DEC     =      53.999969355408 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     14.9033333333333 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     33.9841666666667 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     3.83396283901424 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Aur-01'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '05 38 49'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+54 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  =                20440 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20440 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     26.4099998474121 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     26.4099998474121 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                 14.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 49.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               905.22 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 26.3 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 34.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             9.400752 / [kph] Wind gust" status=0
Record 61: "WINDSPD =              6.50052 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/d_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits :)

Spent 0.613234 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-08-12_multinight.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/d_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-08-12_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 37096.658242
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits :)


No overscan detected - all values seem high! (left_median=24199.0, right_median=29433.0)
renamed 'mff_TTUQ2b1x1_2026-08-12_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     26.5200004577637 / [degC] Focuser temperature
AMBTEMP =                 26.3 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Header: 74 keys total, 33 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= '2026-08-16T02:17:38.3101755' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-16T07:17:38.3101755' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =      61268.303915625 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-16T07:17:48.2107255' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61268.3040302084 / 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      =     84.7028857373833 / [deg] RA of telescope" status=0
Record 32: "DEC     =     53.9999693676694 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =               14.985 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     34.0494444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     3.81415463178571 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Aur-01'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '05 38 49'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+54 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  =                20440 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20440 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     26.5200004577637 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     26.5200004577637 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                 14.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 49.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               905.22 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 26.3 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 34.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             9.400752 / [kph] Wind gust" status=0
Record 61: "WINDSPD =              6.50052 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/d_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits :)

Spent 0.628445 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-08-12_multinight.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-08-12_multinight.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/d_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-08-12_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 37096.658242
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits :)


No overscan detected - all values seem high! (left_median=24199.0, right_median=29433.0)
renamed 'mff_TTUQ2b1x1_2026-08-12_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Previews of the CALIBRATED second-epoch images:


fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits



fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
  
Last  image: 2461268.80353965 16.08.2026 07:16:55.826 UTC
WARNING: VaST exited with code 1 on the field Aur-01-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

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

Checking the list of input images specified on the command line ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits is already a symlink and we do not allow symlinks on symlinks
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits is already a symlink and we do not allow symlinks on symlinks

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG)...  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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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 Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits catalog from cache
SExtractor catalog cache: restored Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
The above guess is based on the non-default gain value specified in default.sex by user
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.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 running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits > image00003.cat.sex_log 2>&1
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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.8,7.5,8.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.1,6.1,5.5,6.8,7.4,8.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-01-18T05:48:02.7952840
Setting observation time using DATE-OBS keyword: 2026-01-18T05:48:02.7952840

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-01-18T05:48:02.795
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Exposure 20 sec, 18.01.2026 05:48:02.795 UTC = JD(UTC) 2461058.74181476 mid. exp.
The reference image star  8241.995    59.893 is rejected, see bad_region.lst
The reference image star  9404.122    48.846 is rejected, see bad_region.lst
The reference image star  8969.792    27.773 is rejected, see bad_region.lst
The reference image star  9377.927    23.551 is rejected, see bad_region.lst
The reference image star  8247.504    19.633 is rejected, see bad_region.lst
The reference image star  8907.230    15.128 is rejected, see bad_region.lst
The reference image star  9358.587    11.347 is rejected, see bad_region.lst
The reference image star  9084.400    10.294 is rejected, see bad_region.lst
The reference image star  9374.860     5.957 is rejected, see bad_region.lst
The reference image star  9226.535     3.963 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: 15094, (15094 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: 4656
 * rejected close to frame edge: 65
 * 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): 4
 * 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: -7.54
Detection limit from the magnitude-SNR relation= -7.5  (5.0 sigma detection)
The simple faintest star detection limit= -9.6
80 percent brightest stars detection limit= -10.4
Selected detection limit= -10.4
Final detection limit= -10.4 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.2 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 2
 * 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'.
    15069 * detected, using  499/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.015304, number_of_ambiguous_matches=231 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=14187 inliers=14187 rms 0.39 -> 0.39 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.009209, number_of_ambiguous_matches=139 
14182 * matched, [CVPOLY iter 2: order=2 pairs=14182 inliers=14182 rms 0.20 -> 0.20 pix, max corner correction 0.3 pix] fraction_of_ambiguous_matches= 0.005830, number_of_ambiguous_matches=88 
14180 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=14180 inliers=14180 rms 0.14 -> 0.14 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.002054, number_of_ambiguous_matches=31 
14178 * matched (3rd iteration). Success!
  rotation [degrees] =   0.009
    15069 stars detected, 14178 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 12799, N_manually_selected_comparison_stars = 0
Using 12799 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 12799 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00086
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 12798 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.56
    15985 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  205724 kB used, 241000 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.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: 2026-08-16T07:16:55.8267731
Setting observation time using DATE-OBS keyword: 2026-08-16T07:16:55.8267731

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-16T07:16:55.826
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
The star  8042.502  1594.088 is rejected, see bad_region.lst
The star  8019.998  2103.168 is rejected, see bad_region.lst
The star  8205.376  2227.204 is rejected, see bad_region.lst
The star  7781.785  2469.937 is rejected, see bad_region.lst
The star  8648.033  3047.407 is rejected, see bad_region.lst
The star  7673.701  3052.111 is rejected, see bad_region.lst
The star  7738.212  3186.787 is rejected, see bad_region.lst
The star  7854.950  3717.128 is rejected, see bad_region.lst
The star  7735.648  3735.682 is rejected, see bad_region.lst
The star  7785.912  4256.568 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3745
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 48
 * rejected close to frame edge: 28
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.2 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 30
 * 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'.
     3745 * detected, using  124/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=2058 inliers=2058 rms 0.71 -> 0.13 pix, max corner correction 17.4 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2058 * matched, [CVPOLY iter 2: order=1 pairs=2058 inliers=2058 rms 0.13 -> 0.13 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2058 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=2058 inliers=2058 rms 0.13 -> 0.13 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2058 * matched (3rd iteration). Success!
  rotation [degrees] = -174.159
     3745 stars detected,  2058 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 1662, N_manually_selected_comparison_stars = 0
Using 1662 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 1561 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00019*X_pix -0.00007*Y_pix -0.42866
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 1561 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.97
 ERROR!!! Magnitude calibration failure. Dropping image. 
    15985 objects stored in memory (1000000 max.)
memory:  205212 kB used, 241000 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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: 2026-08-16T07:17:38.3101755
Setting observation time using DATE-OBS keyword: 2026-08-16T07:17:38.3101755

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-16T07:17:38.310
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
The star  7747.104   282.923 is rejected, see bad_region.lst
The star  8045.340  1594.913 is rejected, see bad_region.lst
The star  8022.866  2104.128 is rejected, see bad_region.lst
The star  8208.340  2228.061 is rejected, see bad_region.lst
The star  7784.571  2470.715 is rejected, see bad_region.lst
The star  8650.579  3048.505 is rejected, see bad_region.lst
The star  7676.357  3052.966 is rejected, see bad_region.lst
The star  7740.843  3187.716 is rejected, see bad_region.lst
The star  8465.800  3514.143 is rejected, see bad_region.lst
The star  7857.398  3718.173 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3742
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 51
 * rejected close to frame edge: 24
 * 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): 0
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     3742 * detected, using  123/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=2076 inliers=2076 rms 0.80 -> 0.31 pix, max corner correction 18.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2075 * matched, [CVPOLY iter 2: order=1 pairs=2075 inliers=2075 rms 0.14 -> 0.14 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2075 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=2075 inliers=2075 rms 0.14 -> 0.14 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2075 * matched (3rd iteration). Success!
  rotation [degrees] = -174.182
     3742 stars detected,  2075 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 1677, N_manually_selected_comparison_stars = 0
Using 1677 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 1566 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00019*X_pix -0.00008*Y_pix -0.41876
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 1566 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.95
 ERROR!!! Magnitude calibration failure. Dropping image. 
    15985 objects stored in memory (1000000 max.)
memory:  205212 kB used, 241000 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 30163 (30163 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  6219 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  2821 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  1637 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  1310 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  2191 stars

done!  =)
TIMING select_aperture: 1 seconds
WARNING: Can't open candidates-transients.lst for reading! -- No candidates found?
Non-zero exit code of lib/transient_list
ERROR running  lib/create_list_of_candidate_transients.sh
Computing lightcurve statistics...  Will not compute variability indexes for objects having <1 points in lightcurve
You may disable this by commenting out the line '#define DROP_LIGHTCURVES_WITH_SMALL_NUMBER_OF_POINTS_FROM_ALL_PLOTS' in src/vast_limits.h an re-compiling VaST with 'make'

Computing, please wait a bit
............................................................................................................................................
vast_lightcurve_statistics.log: 14042 objects, the longest string is 385 bytes.
Allocating memory for resorting the file.



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



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

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

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

Low percentage of matched images - we'll declare this an unsuccessful VaST run (exit code 1)
_____________________
SExtractor catalog cache: saved Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits.cat to cache
SExtractor catalog cache: saved Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Last  image: 2461268.80353965 16.08.2026 07:16:55.826 UTC
ERROR running VaST on the field Aur-01-Q2b1x1 (less than 4 images processed)
exp_start= 18.01.2026 05:48:02.795  exp=   20.000  JD= 2461058.74181476  ap=  6.1  rotation=   0.000  *detected= 15094  *matched= 15094  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
exp_start= 18.01.2026 05:49:01.778  exp=   20.000  JD= 2461058.74249743  ap=  6.2  rotation=   0.009  *detected= 15069  *matched= 14178  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
exp_start= 16.08.2026 07:16:55.826  exp=   20.000  JD= 2461268.80353965  ap=  6.2  rotation= -174.159  *detected=  3745  *matched=  2058  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
exp_start= 16.08.2026 07:17:38.310  exp=   20.000  JD= 2461268.80403137  ap=  6.1  rotation= -174.182  *detected=  3742  *matched=  2075  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
  
Last  image: 2461268.80353965 16.08.2026 07:16:55.826 UTC
WARNING: VaST exited with code 1 on the field Aur-01-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

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

Checking the list of input images specified on the command line ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits is already a symlink and we do not allow symlinks on symlinks
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits is already a symlink and we do not allow symlinks on symlinks

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG)...  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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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 Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits catalog from cache
SExtractor catalog cache: restored Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
The above guess is based on the non-default gain value specified in default.sex by user
Parent process says: we are done fork()ing.
Waiting for thread 2 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.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
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits > image00003.cat.sex_log 2>&1b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
The above guess is b
ased on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.6,4.6,4.1,5.0,5.5,6.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.5,4.5,4.1,5.0,5.5,5.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits


Done with SExtractor!

TIMING SExtractor: 10 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/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-01-18T05:48:02.7952840
Setting observation time using DATE-OBS keyword: 2026-01-18T05:48:02.7952840

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-01-18T05:48:02.795
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
Exposure 20 sec, 18.01.2026 05:48:02.795 UTC = JD(UTC) 2461058.74181476 mid. exp.
The reference image star  8241.992    59.895 is rejected, see bad_region.lst
The reference image star  9404.121    48.846 is rejected, see bad_region.lst
The reference image star  8321.188    54.984 is rejected, see bad_region.lst
The reference image star  8969.791    27.774 is rejected, see bad_region.lst
The reference image star  9377.923    23.552 is rejected, see bad_region.lst
The reference image star  8247.500    19.638 is rejected, see bad_region.lst
The reference image star  9003.421    19.793 is rejected, see bad_region.lst
The reference image star  7542.332    19.413 is rejected, see bad_region.lst
The reference image star  8907.229    15.129 is rejected, see bad_region.lst
The reference image star  8673.454    14.504 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: 113452, (113452 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 28
 * rejected inside rectangles defined in bad_region.lst: 27966
 * rejected close to frame edge: 496
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.6 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 127
 * 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: -7.20
Detection limit from the magnitude-SNR relation= -7.2  (5.0 sigma detection)
The simple faintest star detection limit= -6.5
80 percent brightest stars detection limit= -7.7
Selected detection limit= -7.7
Final detection limit= -7.7 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.04.6 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 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'.
    113779 * detected, using  501/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.017297, number_of_ambiguous_matches=1968 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=103439 inliers=103439 rms 0.32 -> 0.32 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.017314, number_of_ambiguous_matches=1970 
103440 * matched, [CVPOLY iter 2: order=1 pairs=103440 inliers=103440 rms 0.32 -> 0.32 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.017314, number_of_ambiguous_matches=1970 
103440 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=103440 inliers=103440 rms 0.32 -> 0.32 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.012595, number_of_ambiguous_matches=1433 
103385 * matched (3rd iteration). Success!
  rotation [degrees] =   0.009
    113779 stars detected, 103385 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 90249, N_manually_selected_comparison_stars = 0
Using 90249 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 90245 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00270
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 86159 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.20
    123846 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  295444 kB used, 329040 kB peak, 65263848 kB available RAM
Total number of measurements 227231 (227231 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_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.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: 2026-08-16T07:16:55.8267731
Setting observation time using DATE-OBS keyword: 2026-08-16T07:16:55.8267731

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-16T07:16:55.826
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
The star  7956.431    82.014 is rejected, see bad_region.lst
The star  7744.097   282.005 is rejected, see bad_region.lst
The star  7675.652   306.327 is rejected, see bad_region.lst
The star  7596.419   505.934 is rejected, see bad_region.lst
The star  8900.040   510.043 is rejected, see bad_region.lst
The star  7598.350   811.051 is rejected, see bad_region.lst
The star  7732.383   945.584 is rejected, see bad_region.lst
The star  7942.720  1009.475 is rejected, see bad_region.lst
The star  7525.928  1195.259 is rejected, see bad_region.lst
The star  7777.049  1243.037 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 35054
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 5
 * rejected inside rectangles defined in bad_region.lst: 445
 * rejected close to frame edge: 181
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.6 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 94
 * 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'.
    35054 * detected, using  154/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000646, number_of_ambiguous_matches=80 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=21544 inliers=21544 rms 1.71 -> 0.38 pix, max corner correction 17.0 pix] fraction_of_ambiguous_matches= 0.000234, number_of_ambiguous_matches=29 
21619 * matched, [CVPOLY iter 2: order=1 pairs=21619 inliers=21619 rms 0.22 -> 0.22 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.000234, number_of_ambiguous_matches=29 
21619 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=21619 inliers=21619 rms 0.22 -> 0.22 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000194, number_of_ambiguous_matches=24 
21618 * matched (3rd iteration). Success!
  rotation [degrees] = -174.165
    35054 stars detected, 21618 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 17394, N_manually_selected_comparison_stars = 0
Using 17394 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 15860 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00020*X_pix -0.00007*Y_pix -0.44821
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 15860 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.60
 ERROR!!! Magnitude calibration failure. Dropping image. 
    123846 objects stored in memory (1000000 max.)
The transient candidate (new frame position  2035.521  2902.567 ; ref frame position:  7497.581  3768.897) is rejected as at the reference frame it would land at a bad region listed in bad_region.lst
memory:  446048 kB used, 573980 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.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: 2026-08-16T07:17:38.3101755
Setting observation time using DATE-OBS keyword: 2026-08-16T07:17:38.3101755

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-08-16T07:17:38.310
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
The star  7959.924    82.616 is rejected, see bad_region.lst
The star  8310.917   186.863 is rejected, see bad_region.lst
The star  7747.106   282.924 is rejected, see bad_region.lst
The star  7679.265   307.212 is rejected, see bad_region.lst
The star  7763.367   325.177 is rejected, see bad_region.lst
The star  7599.310   506.867 is rejected, see bad_region.lst
The star  8899.982   510.015 is rejected, see bad_region.lst
The star  7710.461   599.523 is rejected, see bad_region.lst
The star  7613.971   635.612 is rejected, see bad_region.lst
The star  7811.548   659.219 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 35738
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 6
 * rejected inside rectangles defined in bad_region.lst: 486
 * rejected close to frame edge: 166
 * 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): 77
 * 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'.
    35738 * detected, using  157/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000630, number_of_ambiguous_matches=78 
refining the coordinate transformation... [CVPOLY iter 1: order=3 pairs=22091 inliers=22091 rms 1.77 -> 0.40 pix, max corner correction 11.9 pix] fraction_of_ambiguous_matches= 0.000331, number_of_ambiguous_matches=41 
22131 * matched, [CVPOLY iter 2: order=1 pairs=22131 inliers=22131 rms 0.23 -> 0.23 pix, max corner correction 0.2 pix] fraction_of_ambiguous_matches= 0.000323, number_of_ambiguous_matches=40 
22131 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=22131 inliers=22131 rms 0.23 -> 0.23 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.000275, number_of_ambiguous_matches=34 
22131 * matched (3rd iteration). Success!
  rotation [degrees] = -174.169
    35738 stars detected, 22131 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 17841, N_manually_selected_comparison_stars = 0
Using 17841 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 16271 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00020*X_pix -0.00008*Y_pix -0.43781
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 16271 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.58
 ERROR!!! Magnitude calibration failure. Dropping image. 
    123846 objects stored in memory (1000000 max.)
memory:  446312 kB used, 573980 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 5 seconds
Done with measurements! =)

Total number of measurements 227231 (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 17778 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 29774 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 14936 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 14392 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 26505 stars

done!  =)
TIMING select_aperture: 11 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: 102927 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 Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits.cat to cache
SExtractor catalog cache: saved Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
Last  image: 2461268.80353965 16.08.2026 07:16:55.826 UTC
ERROR running VaST on the field Aur-01-Q2b1x1 (less than 4 images processed)
exp_start= 18.01.2026 05:48:02.795  exp=   20.000  JD= 2461058.74181476  ap=  4.6  rotation=   0.000  *detected= 113452  *matched= 113452  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-48-02_20.00sec_-14.90C_LIGHT_0235.fits
exp_start= 18.01.2026 05:49:01.778  exp=   20.000  JD= 2461058.74249743  ap=  4.6  rotation=   0.009  *detected= 113779  *matched= 103385  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Aur-01-Q2b1x1_2026-01-17_23-49-01_20.00sec_-15.00C_LIGHT_0236.fits
exp_start= 16.08.2026 07:16:55.826  exp=   20.000  JD= 2461268.80353965  ap=  4.6  rotation= -174.165  *detected= 35054  *matched= 21618  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-16-55_20.00sec_-0.00C_LIGHT_0322.fits
exp_start= 16.08.2026 07:17:38.310  exp=   20.000  JD= 2461268.80403137  ap=  4.5  rotation= -174.169  *detected= 35738  *matched= 22131  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-08-16_CI_Aur-01-Q2b1x1_022841_TTUQ2b1x1_3625377_8kpcTFQG/fd_Aur-01-Q2b1x1_2026-08-16_02-17-38_20.00sec_-0.00C_LIGHT_0323.fits
########### Completed Aur-01-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: Sun Aug 16 02:30:39 CDT 2026
=======================================
TIMING SExtractor: 2 seconds
TIMING matching_and_photometry: 1 seconds
TIMING lightcurve_write: 0 seconds
TIMING select_aperture: 1 seconds
    VAST_RUN_default.sex.telephoto_lens_onlybrightstars_v1: 4s (0.07 min)
TIMING SExtractor: 10 seconds
TIMING matching_and_photometry: 5 seconds
TIMING lightcurve_write: 0 seconds
TIMING select_aperture: 11 seconds
    VAST_RUN_default.sex.telephoto_lens_vSTL: 34s (0.57 min)
FIELD_Aur-01-Q2b1x1: 53s (0.88 min)
=======================================
TOTAL_RUNTIME: 57s (0.95 min)
Finished: Sun Aug 16 02:31:36 CDT 2026