ERROR running VaST on the field Mon-06-Q2b1x1 (wrong field? clouds? very bad focus?)
ERROR running VaST on the field Mon-06-Q2b1x1 (wrong field? clouds? very bad focus?)

######## 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= /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= 15.0
FLAT_FIELD_FILE= /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-08_multinight.fit
FRAME_EDGE_OFFSET_PIX= 600
GAIA_BAND_FOR_CATALOGED_SOURCE_CHECK= 
MAX_NEW_TO_REF_MEAN_IMG_VALUE_RATIO= 100
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= 8000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 4000
OMP_NUM_THREADS= 
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= 4
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: 
Mon-06-Q2b1x1
#######################################
########### Starting Mon-06-Q2b1x1 ###########
Processing Mon-06-Q2b1x1
server tau has sufficient free disk space available: 1141791 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 1141791 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.png' -> 'transient_report/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits_preview.png'

Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits


renamed 'Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.png' -> 'transient_report/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits_preview.png'

Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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= 823.9136
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 734.7780
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 7480.9385
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 2887.5030
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 6844.7844
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 2520.6767
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 9.07976
INFO:                  SECOND_EPOCH__SD_ratio= 0.146
ERROR: passing clouds (SD ratio=0.146 soft threshold=0.12)
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-08_multinight.fit
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                 -5.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -4.9 / [degC] CCD temperature
FOCTEMP =     17.6499996185303 / [degC] Focuser temperature
AMBTEMP =                 22.9 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits 
CCD-TEMP= -4.900000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.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= '2026-04-28T21:55:22.5968184' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-04-29T02:55:22.5968184' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61159.1217893055 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-04-29T02:55:32.4972801' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61159.1219039005 / 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=                 -5.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -4.9 / [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      =        115.711230703 / [deg] RA of telescope" status=0
Record 32: "DEC     =     -9.9997177616365 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     30.0908333333333 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =              230.945 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.98884485895338 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Mon-06'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '07 42 51'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '-10 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  =                20421 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20421 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     17.6499996185303 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     17.6499996185303 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                -11.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                  9.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               897.19 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 22.9 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                  1.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=                  0.0 / [kph] Wind gust" status=0
Record 61: "WINDSPD =                  0.0 / [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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits 9576 6388  16 bitpix
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
SET-TEMP= -5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit
CCD-TEMP= -4.900000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
CCD-TEMP= -5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/d_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits :)

Spent 0.655916 seconds 
renamed 'mdark_TTUQ2b1x1_-5C_20s_2026-04-22.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/d_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-08_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 40671.357813
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits :)


No overscan detected - all values seem high! (left_median=26440.0, right_median=31961.0)
renamed 'mff_TTUQ2b1x1_2026-04-08_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                 -5.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -5.0 / [degC] CCD temperature
FOCTEMP =     18.6900005340576 / [degC] Focuser temperature
AMBTEMP =                 22.9 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits 
CCD-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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= '2026-04-28T21:56:12.7576790' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-04-29T02:56:12.7576790' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61159.1223698729 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-04-29T02:56:22.6593818' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61159.1224844791 / 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=                 -5.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -5.0 / [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      =     115.711230752339 / [deg] RA of telescope" status=0
Record 32: "DEC     =    -9.99971777020644 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     29.9558333333333 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     231.124166666667 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.99690689279221 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'East'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'Mon-06'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '07 42 51'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '-10 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  =                20421 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20421 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     18.6900005340576 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     18.6900005340576 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                -11.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                  9.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               897.19 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 22.9 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                  1.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=                  0.0 / [kph] Wind gust" status=0
Record 61: "WINDSPD =                  0.0 / [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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits 9576 6388  16 bitpix
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
SET-TEMP= -5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit
CCD-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
CCD-TEMP= -5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-5C_20s_2026-04-22.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/d_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits :)

Spent 0.652692 seconds 
renamed 'mdark_TTUQ2b1x1_-5C_20s_2026-04-22.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/d_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-08_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 40671.357813
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits :)


No overscan detected - all values seem high! (left_median=26440.0, right_median=31961.0)
renamed 'mff_TTUQ2b1x1_2026-04-08_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
Previews of the CALIBRATED second-epoch images:


fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits



fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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 --norotation --noflagimage --starmatchraius 4 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
  
Last  image: 2461159.62190505 29.04.2026 02:55:22.596 UTC
ERROR running VaST on the field Mon-06-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____

--==VaST 1.0rc90==--

Parsing command line arguments...
opt 'r': assuming no rotation larger than 15.0 degrees!
opt 'F': Will NOT create flag images for SExtractor
opt '5': 4.000000 pix is the new fixed star matching radius!
opt 'b': Using 500 reference stars for image matching!
opt '3': Will try to select best aperture for each source!
opt 'y': 0 SysRem iterations will be conducted!
opt 't 4': robust linear magnitude calibration (vary zero-point and slope)
opt 'x': 99 is the maximum acceptable SExtractor flag!
WARNING: disabling the mag-size filter in order not to reject blended stars.
opt 'u': Stick with UTC time system, no conversion to TT will be done!
opt 'f': Run ./find_candidates manually!
opt 'k': "JD" keyword in FITS image header will be ignored!
INFO from vast_remove_directory(): Could not open directory: symlinks_to_images
INFO from vast_remove_directory(): Could not open directory: converted_images
INFO from vast_remove_directory(): Could not open directory: unpacked_images

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

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje)...  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 --norotation --noflagimage --starmatchraius 4 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 image regions  (defined in bad_region.lst).
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits catalog from cache
SExtractor catalog cache: restored Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits catalog from cache
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.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 3 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
The above guess is based on the non-default gain value specified in default.sex by user
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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.3,6.3,5.7,6.9,7.6,8.2 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.4,6.4,5.7,7.0,7.7,8.3 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
Waiting for thread 2 to finish...
Waiting for thread 1 to finish...


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/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-06T02:54:53.4845941
Setting observation time using DATE-OBS keyword: 2026-04-06T02:54:53.4845941

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-06T02:54:53.484
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Exposure 20 sec, 06.04.2026 02:54:53.484 UTC = JD(UTC) 2461136.62156810 mid. exp.
The reference image star  9338.465    21.306 is rejected, see bad_region.lst
The reference image star  8134.647    21.053 is rejected, see bad_region.lst
The reference image star  8315.021    18.961 is rejected, see bad_region.lst
The reference image star  9021.345    17.396 is rejected, see bad_region.lst
The reference image star  8171.853    17.168 is rejected, see bad_region.lst
The reference image star  8796.826    15.897 is rejected, see bad_region.lst
The reference image star  8675.608    16.072 is rejected, see bad_region.lst
The reference image star  7864.168    14.838 is rejected, see bad_region.lst
The reference image star  8356.656    14.682 is rejected, see bad_region.lst
The reference image star  8261.878    12.776 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: 21014, (21014 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: 8359
 * rejected close to frame edge: 99
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.4 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): 16
 * 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: -7.92
Detection limit from the magnitude-SNR relation= -7.9  (5.0 sigma detection)
The simple faintest star detection limit= -9.9
80 percent brightest stars detection limit= -10.7
Selected detection limit= -10.7
Final detection limit= -10.7 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.4 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): 23
 * 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'.
    20913 * detected, using  497/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.002284, number_of_ambiguous_matches=48 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.002237, number_of_ambiguous_matches=47 
19572 * matched, fraction_of_ambiguous_matches= 0.002237, number_of_ambiguous_matches=47 
19572 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.002237, number_of_ambiguous_matches=47 
19572 * matched (3rd iteration). Success!
  rotation [degrees] =   0.007
    20913 stars detected, 19572 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 17508, N_manually_selected_comparison_stars = 0
Using 17508 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 17508 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00017
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 17507 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.92
    22355 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  114652 kB used, 126480 kB peak, 65263856 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-29T02:55:22.5968184
Setting observation time using DATE-OBS keyword: 2026-04-29T02:55:22.5968184

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-29T02:55:22.596
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
The star  7861.087    14.789 is rejected, see bad_region.lst
The star  8329.447    10.459 is rejected, see bad_region.lst
The star  8803.180     7.127 is rejected, see bad_region.lst
The star  8441.909     4.884 is rejected, see bad_region.lst
The star  8081.374     3.824 is rejected, see bad_region.lst
The star  9017.999    16.630 is rejected, see bad_region.lst
The star  9335.058    20.287 is rejected, see bad_region.lst
The star  8131.407    20.875 is rejected, see bad_region.lst
The star  8311.697    18.801 is rejected, see bad_region.lst
The star  8168.681    16.887 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 2691
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 800
 * rejected close to frame edge: 14
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.4 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 1
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     2691 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2688 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2688 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
2688 * matched (3rd iteration). Success!
  rotation [degrees] =   0.017
     2691 stars detected,  2688 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 2118, N_manually_selected_comparison_stars = 0
Using 2118 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 2035 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00003*X_pix +0.00018*Y_pix -0.11984
ERROR in magnitude calibration: fabs(lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 2035 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.96
 ERROR!!! Magnitude calibration failure. Dropping image. 
    22355 objects stored in memory (400000 max.)
memory:  110776 kB used, 126480 kB peak, 65263856 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-29T02:56:12.7576790
Setting observation time using DATE-OBS keyword: 2026-04-29T02:56:12.7576790

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-29T02:56:12.757
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
The star  8436.307    10.234 is rejected, see bad_region.lst
The star  8075.775     9.156 is rejected, see bad_region.lst
The star  8718.695     2.467 is rejected, see bad_region.lst
The star  8323.917    15.755 is rejected, see bad_region.lst
The star  7855.495    20.138 is rejected, see bad_region.lst
The star  9329.480    25.561 is rejected, see bad_region.lst
The star  8125.800    26.212 is rejected, see bad_region.lst
The star  8280.811    32.095 is rejected, see bad_region.lst
The star  9424.073    29.080 is rejected, see bad_region.lst
The star  7894.192    40.234 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3330
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 589
 * rejected close to frame edge: 12
 * rejected as being too small (<1.6 pix): 0
 * rejected as being too large (>6.3 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 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'.
     3330 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
3318 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
3318 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
3318 * matched (3rd iteration). Success!
  rotation [degrees] =   0.009
     3330 stars detected,  3318 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 2629, N_manually_selected_comparison_stars = 0
Using 2629 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 2555 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00007*X_pix +0.00015*Y_pix -0.52003
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 2555 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.89
 ERROR!!! Magnitude calibration failure. Dropping image. 
    22355 objects stored in memory (400000 max.)
memory:  110776 kB used, 126480 kB peak, 65263856 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 0 seconds
Done with measurements! =)

Total number of measurements 41927 (41927 measurements stored in RAM)
Freeing up some memory...  Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 1 seconds
The lightcurve files have been written, freeing up more memory...
Creating vast_image_details.log ... 

Writing summary file: vast_summary.log ...  OK
Selecting the best aperture for each source
Aperture with index 0 (REFERENCE_APERTURE_DIAMETER +0.00*REFERENCE_APERTURE_DIAMETER) seems best for  4689 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  5535 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  2679 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  2301 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  4368 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: 19371 objects, the longest string is 383 bytes.
Allocating memory for resorting the file.
Variability index idx00_STD  is enabled
Variability index idx01_wSTD is enabled
Variability index idx08_Npts is enabled
Variability index idx09_MAD  is enabled
Variability index idx11_RoMS is enabled
Variability index idx12_rCh2 is enabled
Variability index idx17_Jtim is enabled
Variability index idx18_Ltim is enabled
Variability index idx21_eta  is enabled
Variability index idx23_S_B  is enabled
Variability index idx25_IQR  is enabled
Computing the expected values of variability indexes and their scatter as a function of magnitude
..........
..........
..........
..........
Wriring the list of candidate variables to vast_autocandidates.log .............................................................................................................................................................................................



----***** 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)
_____________________
wait
*------ default.sex.telephoto_lens_vSTL ------*
'default.sex.telephoto_lens_vSTL' -> 'default.sex'
Starting VaST with default.sex.telephoto_lens_vSTL

  ./vast --norotation --noflagimage --starmatchraius 4 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
  
Last  image: 2461159.62190505 29.04.2026 02:55:22.596 UTC
ERROR running VaST on the field Mon-06-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____

--==VaST 1.0rc90==--

Parsing command line arguments...
opt 'r': assuming no rotation larger than 15.0 degrees!
opt 'F': Will NOT create flag images for SExtractor
opt '5': 4.000000 pix is the new fixed star matching radius!
opt 'b': Using 500 reference stars for image matching!
opt '3': Will try to select best aperture for each source!
opt 'y': 0 SysRem iterations will be conducted!
opt 't 4': robust linear magnitude calibration (vary zero-point and slope)
opt 'x': 99 is the maximum acceptable SExtractor flag!
WARNING: disabling the mag-size filter in order not to reject blended stars.
opt 'u': Stick with UTC time system, no conversion to TT will be done!
opt 'f': Run ./find_candidates manually!
opt 'k': "JD" keyword in FITS image header will be ignored!
INFO from vast_remove_directory(): Could not open directory: symlinks_to_images
INFO from vast_remove_directory(): Could not open directory: converted_images
INFO from vast_remove_directory(): Could not open directory: unpacked_images

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

Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje)...  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 --norotation --noflagimage --starmatchraius 4 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 image regions  (defined in bad_region.lst).
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits catalog from cache
SExtractor catalog cache: restored Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits catalog from cache
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-55-36_20.00sec_-4.90C_LIGHT_0047.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.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 3 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 image regions  (defined in bad_region.lst).
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
The above guess is basex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits > image00003.cat.sex_log 2>&1sed on the non-default gain value specified in default.sex by user

autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.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:  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:  3322.0  3744.0  3324.0  3746.0  (defined in bad_region.lst)
Excluding image region:  3586.0  4005.0  3588.0  4007.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 14 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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.8,4.8,4.4,5.3,5.8,6.3 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.2,5.6,6.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
Waiting for thread 2 to finish...
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits


Done with SExtractor!

TIMING SExtractor: 13 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/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-06T02:54:53.4845941
Setting observation time using DATE-OBS keyword: 2026-04-06T02:54:53.4845941

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-06T02:54:53.484
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Mon-06-Q2b1x1_2026-04-05_21-54-53_20.00sec_-4.90C_LIGHT_0046.fits
Exposure 20 sec, 06.04.2026 02:54:53.484 UTC = JD(UTC) 2461136.62156810 mid. exp.
The reference image star  7529.959     1.359 is rejected, see bad_region.lst
The reference image star  8359.357     1.221 is rejected, see bad_region.lst
The reference image star  8797.950     1.623 is rejected, see bad_region.lst
The reference image star  9375.143     2.468 is rejected, see bad_region.lst
The reference image star  7626.802     1.983 is rejected, see bad_region.lst
The reference image star  7693.033     1.285 is rejected, see bad_region.lst
The reference image star  7845.618     1.438 is rejected, see bad_region.lst
The reference image star  7899.712     1.362 is rejected, see bad_region.lst
The reference image star  7966.111     1.179 is rejected, see bad_region.lst
The reference image star  8011.846     1.999 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: 167149, (167149 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 80
 * rejected inside rectangles defined in bad_region.lst: 40192
 * rejected close to frame edge: 683
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 10
 * 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: -7.53
Detection limit from the magnitude-SNR relation= -7.5  (5.0 sigma detection)
The simple faintest star detection limit= -6.8
80 percent brightest stars detection limit= -8.0
Selected detection limit= -8.0
Final detection limit= -8.0 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.04.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 16
 * 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'.
    167863 * detected, using  502/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.011372, number_of_ambiguous_matches=1909 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.011378, number_of_ambiguous_matches=1910 
152519 * matched, fraction_of_ambiguous_matches= 0.011378, number_of_ambiguous_matches=1910 
152519 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.011378, number_of_ambiguous_matches=1910 
152519 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.002
    167863 stars detected, 152519 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 125040, N_manually_selected_comparison_stars = 0
Using 125040 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 125036 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix +0.00089
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 119806 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.53
    182493 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  229600 kB used, 256220 kB peak, 65263856 kB available RAM
Total number of measurements 335012 (335012 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_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-29T02:55:22.5968184
Setting observation time using DATE-OBS keyword: 2026-04-29T02:55:22.5968184

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-29T02:55:22.596
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-55-22_20.00sec_-4.90C_LIGHT_0030.fits
The star  7750.676    36.686 is rejected, see bad_region.lst
The star  9429.543    23.812 is rejected, see bad_region.lst
The star  9335.049    20.287 is rejected, see bad_region.lst
The star  8131.407    20.876 is rejected, see bad_region.lst
The star  8311.699    18.801 is rejected, see bad_region.lst
The star  9018.006    16.628 is rejected, see bad_region.lst
The star  8764.548    16.863 is rejected, see bad_region.lst
The star  8168.681    16.889 is rejected, see bad_region.lst
The star  7612.357    16.853 is rejected, see bad_region.lst
The star  8672.546    15.516 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 30793
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 1
 * rejected inside rectangles defined in bad_region.lst: 5991
 * rejected close to frame edge: 112
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.8 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): 134
 * 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'.
    30793 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000066, number_of_ambiguous_matches=12 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000066, number_of_ambiguous_matches=12 
30709 * matched, fraction_of_ambiguous_matches= 0.000066, number_of_ambiguous_matches=12 
30709 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000066, number_of_ambiguous_matches=12 
30709 * matched (3rd iteration). Success!
  rotation [degrees] =   0.012
    30793 stars detected, 30709 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 22849, N_manually_selected_comparison_stars = 0
Using 22849 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 21495 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00001*X_pix +0.00022*Y_pix -0.29347
ERROR in magnitude calibration: fabs(lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 21495 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.42
 ERROR!!! Magnitude calibration failure. Dropping image. 
    182493 objects stored in memory (400000 max.)
memory:  1901072 kB used, 1990972 kB peak, 65263856 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-29T02:56:12.7576790
Setting observation time using DATE-OBS keyword: 2026-04-29T02:56:12.7576790

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-29T02:56:12.757
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-28_CI_Mon-06-Q2b1x1_215659_TTUQ2b1x1_440002_RR9f1mje/fd_Mon-06-Q2b1x1_2026-04-28_21-56-12_20.00sec_-5.00C_LIGHT_0031.fits
The star  9012.383    21.930 is rejected, see bad_region.lst
The star  8323.913    15.752 is rejected, see bad_region.lst
The star  8797.552    12.462 is rejected, see bad_region.lst
The star  8500.546    12.680 is rejected, see bad_region.lst
The star  8436.301    10.225 is rejected, see bad_region.lst
The star  9491.436    10.747 is rejected, see bad_region.lst
The star  8075.739     9.164 is rejected, see bad_region.lst
The star  7786.681     9.486 is rejected, see bad_region.lst
The star  9422.459     8.108 is rejected, see bad_region.lst
The star  7631.842     6.242 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 36738
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 2
 * rejected inside rectangles defined in bad_region.lst: 4276
 * rejected close to frame edge: 125
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>4.7 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 170
 * 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'.
    36738 * detected, using  109/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000142, number_of_ambiguous_matches=26 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000142, number_of_ambiguous_matches=26 
36557 * matched, fraction_of_ambiguous_matches= 0.000142, number_of_ambiguous_matches=26 
36557 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000142, number_of_ambiguous_matches=26 
36557 * matched (3rd iteration). Success!
  rotation [degrees] =   0.010
    36738 stars detected, 36557 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 27607, N_manually_selected_comparison_stars = 0
Using 27607 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 25860 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00010*X_pix +0.00017*Y_pix -0.68258
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 25860 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.40
 ERROR!!! Magnitude calibration failure. Dropping image. 
    182493 objects stored in memory (400000 max.)
memory:  1903052 kB used, 1990972 kB peak, 65263856 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 6 seconds
Done with measurements! =)

Total number of measurements 335012 (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 23758 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 39235 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 34828 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 19255 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 35443 stars

done!  =)
TIMING select_aperture: 7 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: 151715 objects, the longest string is 384 bytes.
Allocating memory for resorting the file.
Variability index idx00_STD  is enabled
Variability index idx01_wSTD is enabled
Variability index idx08_Npts is enabled
Variability index idx09_MAD  is enabled
Variability index idx11_RoMS is enabled
Variability index idx12_rCh2 is enabled
Variability index idx17_Jtim is enabled
Variability index idx18_Ltim is enabled
Variability index idx21_eta  is enabled
Variability index idx23_S_B  is enabled
Variability index idx25_IQR  is enabled
Computing the expected values of variability indexes and their scatter as a function of magnitude
..........
..........
..........
..........
Wriring the list of candidate variables to vast_autocandidates.log ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................



----***** 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)
_____________________
########### Completed Mon-06-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: Tue Apr 28 21:58:22 CDT 2026
=======================================
FIELD_Mon-06-Q2b1x1: 221s (3.68 min)
=======================================
TOTAL_RUNTIME: 224s (3.73 min)
Finished: Tue Apr 28 22:02:06 CDT 2026