ERROR running VaST on the field Leo-06-Q2b1x1 (wrong field? clouds? very bad focus?)
ERROR running VaST on the field Leo-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_2026-04-22_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: 
Leo-06-Q2b1x1
#######################################
########### Starting Leo-06-Q2b1x1 ###########
Processing Leo-06-Q2b1x1
server tau has sufficient free disk space available: 853188 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 853188 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.png' -> 'transient_report/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits_preview.png'

Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits


renamed 'Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.png' -> 'transient_report/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits_preview.png'

Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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= 532.6367
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 471.1419
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 6809.7647
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 1599.5960
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 6741.5583
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 1424.8961
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 12.785
INFO:                  SECOND_EPOCH__SD_ratio= 0.123
ERROR: passing clouds (SD ratio=0.123 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_2026-04-22_multinight.fit
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                 -5.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -5.0 / [degC] CCD temperature
FOCTEMP =     15.0200004577637 / [degC] Focuser temperature
AMBTEMP =                 15.2 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits 
CCD-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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= '2026-05-04T03:09:33.0139919' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-05-04T08:09:33.0139919' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61164.3399654282 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-05-04T08:09:42.9151932' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61164.3400800349 / 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      =     173.332142514337 / [deg] RA of telescope" status=0
Record 32: "DEC     =      13.999948431615 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     24.9263888888889 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     270.403055555556 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     2.36212039457308 / 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  = 'Leo-06'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '11 33 20'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+14 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  =                20384 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20384 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     15.0200004577637 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     15.0200004577637 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                  7.3 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 59.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               896.51 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 15.2 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 24.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             22.00176 / [kph] Wind gust" status=0
Record 61: "WINDSPD =            12.200976 / [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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits 9576 6388  16 bitpix
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/d_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits :)

Spent 0.489997 seconds 
renamed 'mdark_TTUQ2b1x1_-5C_20s_2026-04-22.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/d_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-22_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 42267.109959
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits :)


No overscan detected - all values seem high! (left_median=27349.0, right_median=33499.5)
renamed 'mff_TTUQ2b1x1_2026-04-22_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                 -5.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -4.9 / [degC] CCD temperature
FOCTEMP =     15.0299997329712 / [degC] Focuser temperature
AMBTEMP =                 15.2 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits 
CCD-TEMP= -4.900000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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= '2026-05-04T03:10:17.7540026' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-05-04T08:10:17.7540026' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61164.3404832641 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-05-04T08:10:27.6567486' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61164.3405978703 / 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      =     173.332142522971 / [deg] RA of telescope" status=0
Record 32: "DEC     =     13.9999484239525 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     24.7733333333333 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     270.504722222222 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     2.37562959053376 / 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  = 'Leo-06'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '11 33 20'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+14 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  =                20384 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20384 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     15.0299997329712 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     15.0299997329712 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                  7.3 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 59.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               896.51 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 15.2 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 24.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             22.00176 / [kph] Wind gust" status=0
Record 61: "WINDSPD =            12.200976 / [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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits 9576 6388  16 bitpix
SET-TEMP= -5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/d_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits :)

Spent 0.472759 seconds 
renamed 'mdark_TTUQ2b1x1_-5C_20s_2026-04-22.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/d_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-04-22_multinight.fit 9576 6388  16 bitpix
Avarage count on flat field image: 42267.109959
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits :)


No overscan detected - all values seem high! (left_median=27349.0, right_median=33499.5)
renamed 'mff_TTUQ2b1x1_2026-04-22_multinight.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
Previews of the CALIBRATED second-epoch images:


fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits



fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
  
Last  image: 2461164.84008117 04.05.2026 08:09:33.013 UTC
ERROR running VaST on the field Leo-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 ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.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/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS)...  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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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 Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits catalog from cache
SExtractor catalog cache: restored Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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)
Parent process says: we are done fork()ing.
Excluding image region:  1831.0  2839.0  1833.0  2841.0  (defined in bad_region.lst)
Waiting for thread 3 to finish...
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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits > image00003.cat.sex_log 2>&1
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.3,6.3,5.7,7.0,7.6,8.2 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits > image00003.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 image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits


Done with SExtractor!

TIMING SExtractor: 1 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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.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: 2026-02-22T08:09:59.0130541
Setting observation time using DATE-OBS keyword: 2026-02-22T08:09:59.0130541

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-02-22T08:09:59.013
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
Exposure 20 sec, 22.02.2026 08:09:59.013 UTC = JD(UTC) 2461093.84038209 mid. exp.
The reference image star  7501.596    20.515 is rejected, see bad_region.lst
The reference image star  7499.099    16.183 is rejected, see bad_region.lst
The reference image star  8110.405    12.386 is rejected, see bad_region.lst
The reference image star  7707.921    31.815 is rejected, see bad_region.lst
The reference image star  8000.551    30.099 is rejected, see bad_region.lst
The reference image star  8309.080    32.176 is rejected, see bad_region.lst
The reference image star  7907.333    36.434 is rejected, see bad_region.lst
The reference image star  9414.391    43.506 is rejected, see bad_region.lst
The reference image star  7835.432    61.323 is rejected, see bad_region.lst
The reference image star  8208.234    52.202 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: 4547, (4547 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: 1274
 * rejected close to frame edge: 22
 * 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): 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'.

Please note: the CCD position-dependent magnitude correction will not be applied.
get_detection_limit_sn(): Detection limit: -7.58
Detection limit from the magnitude-SNR relation= -7.6  (5.0 sigma detection)
The simple faintest star detection limit= -9.8
80 percent brightest stars detection limit= -10.5
Selected detection limit= -10.5
Final detection limit= -10.5 (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): 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'.
     4551 * detected, using  500/ 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 
4337 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
4337 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
4337 * matched (3rd iteration). Success!
  rotation [degrees] =   0.002
     4551 stars detected,  4337 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 3987, N_manually_selected_comparison_stars = 0
Using 3987 stars for magnitude calibration (before filtering).
Iteratively removing outliers from the linear mag-mag relation (unweighted fit)...
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 3986 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.57
     4761 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  100412 kB used, 111008 kB peak, 65263856 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-04T08:09:33.0139919
Setting observation time using DATE-OBS keyword: 2026-05-04T08:09:33.0139919

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-04T08:09:33.013
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
The star  7877.793   249.331 is rejected, see bad_region.lst
The star  8618.825   798.683 is rejected, see bad_region.lst
The star  8346.686  1141.461 is rejected, see bad_region.lst
The star  8172.713  1934.731 is rejected, see bad_region.lst
The star  7568.945  2253.412 is rejected, see bad_region.lst
The star  8681.028  2357.851 is rejected, see bad_region.lst
The star  7960.535  2863.853 is rejected, see bad_region.lst
SExtractor output filtering results:
 * passed selection: 140
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 7
 * rejected close to frame edge: 1
 * 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): 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'.
      140 * detected, using  100/ 140 * 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 
87 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
87 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
87 * matched (3rd iteration). Success!
  rotation [degrees] = 179.371
      140 stars detected,    87 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 30, N_manually_selected_comparison_stars = 0
get_detection_limit_sn(): Detection limit: -8.88
 ERROR!!! Magnitude calibration failure. Dropping image. 
     4761 objects stored in memory (400000 max.)
memory:  103020 kB used, 111008 kB peak, 65263856 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-04T08:10:17.7540026
Setting observation time using DATE-OBS keyword: 2026-05-04T08:10:17.7540026

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-04T08:10:17.754
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
The star  8621.836   799.598 is rejected, see bad_region.lst
The star  8349.708  1142.331 is rejected, see bad_region.lst
The star  8175.621  1935.645 is rejected, see bad_region.lst
The star  7571.817  2254.360 is rejected, see bad_region.lst
The star  8684.070  2358.749 is rejected, see bad_region.lst
The star  9478.044  2426.885 is rejected, see bad_region.lst
The star  7963.513  2864.700 is rejected, see bad_region.lst
The star  9074.605  3876.074 is rejected, see bad_region.lst
The star  8198.590  4741.059 is rejected, see bad_region.lst
SExtractor output filtering results:
 * passed selection: 127
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 9
 * rejected close to frame edge: 1
 * 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): 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'.
      127 * detected, using  100/ 127 * 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 
79 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
79 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
79 * matched (3rd iteration). Success!
  rotation [degrees] = 179.384
      127 stars detected,    79 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 28, N_manually_selected_comparison_stars = 0
get_detection_limit_sn(): Detection limit: -8.88
 ERROR!!! Magnitude calibration failure. Dropping image. 
     4761 objects stored in memory (400000 max.)
memory:  103020 kB used, 111008 kB peak, 65263856 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 9098 (9098 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  1063 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  1316 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for   523 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for   512 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for   923 stars

done!  =)
TIMING select_aperture: 0 seconds
WARNING: Can't open candidates-transients.lst for reading! -- No candidates found?
Non-zero exit code of lib/transient_list
ERROR running  lib/create_list_of_candidate_transients.sh
Computing lightcurve statistics...  Will not compute variability indexes for objects having <1 points in lightcurve
You may disable this by commenting out the line '#define DROP_LIGHTCURVES_WITH_SMALL_NUMBER_OF_POINTS_FROM_ALL_PLOTS' in src/vast_limits.h an re-compiling VaST with 'make'

Computing, please wait a bit
..........................................
vast_lightcurve_statistics.log: 4290 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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
  
Last  image: 2461164.84008117 04.05.2026 08:09:33.013 UTC
ERROR running VaST on the field Leo-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 ...
WARNING from replace_file_with_symlink_if_filename_contains_white_spaces() the input file /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.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/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS)...  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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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 Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits catalog from cache
SExtractor catalog cache: restored Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.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/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-10-56_20.00sec_-15.00C_LIGHT_0379.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits > image00003.cat.sex_log 2>&1
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.1,5.6,6.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.6,4.6,4.2,5.1,5.6,6.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.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_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits


Done with SExtractor!

TIMING SExtractor: 3 seconds


Matching stars between images!

No manually selected comparison stars file manually_selected_comparison_stars.lst which is fine.
Processing  /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.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: 2026-02-22T08:09:59.0130541
Setting observation time using DATE-OBS keyword: 2026-02-22T08:09:59.0130541

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-02-22T08:09:59.013
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Leo-06-Q2b1x1_2026-02-22_02-09-59_20.00sec_-15.00C_LIGHT_0378.fits
Exposure 20 sec, 22.02.2026 08:09:59.013 UTC = JD(UTC) 2461093.84038209 mid. exp.
The reference image star  7501.569    20.498 is rejected, see bad_region.lst
The reference image star  7499.097    16.117 is rejected, see bad_region.lst
The reference image star  8203.435    13.585 is rejected, see bad_region.lst
The reference image star  8110.402    12.389 is rejected, see bad_region.lst
The reference image star  9386.523    11.892 is rejected, see bad_region.lst
The reference image star  8687.492     8.180 is rejected, see bad_region.lst
The reference image star  8282.580     7.220 is rejected, see bad_region.lst
The reference image star  8136.303     5.436 is rejected, see bad_region.lst
The reference image star  8990.118     4.444 is rejected, see bad_region.lst
The reference image star  9173.315     2.183 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: 24186, (24186 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 15
 * rejected inside rectangles defined in bad_region.lst: 5758
 * rejected close to frame edge: 107
 * rejected as being too small (<1.2 pix): 0
 * rejected as being too large (>5.0 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'.

Please note: the CCD position-dependent magnitude correction will be applied.
get_detection_limit_sn(): Detection limit: -7.28
Detection limit from the magnitude-SNR relation= -7.3  (5.0 sigma detection)
The simple faintest star detection limit= -6.6
80 percent brightest stars detection limit= -7.8
Selected detection limit= -7.8
Final detection limit= -7.8 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.05.0 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): 18
 * 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'.
    24196 * detected, using  500/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000951, number_of_ambiguous_matches=23 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000951, number_of_ambiguous_matches=23 
22518 * matched, fraction_of_ambiguous_matches= 0.000951, number_of_ambiguous_matches=23 
22518 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000951, number_of_ambiguous_matches=23 
22518 * matched (3rd iteration). Success!
  rotation [degrees] =   0.003
    24196 stars detected, 22518 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 21575, N_manually_selected_comparison_stars = 0
Using 21575 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 21573 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix +0.00051
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 20401 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.28
    25864 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  115764 kB used, 128452 kB peak, 65263856 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-04T08:09:33.0139919
Setting observation time using DATE-OBS keyword: 2026-05-04T08:09:33.0139919

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-04T08:09:33.013
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-09-33_20.00sec_-5.00C_LIGHT_0096.fits
The star  7653.404    15.108 is rejected, see bad_region.lst
The star  7842.822    64.981 is rejected, see bad_region.lst
The star  8737.860   115.300 is rejected, see bad_region.lst
The star  7730.981   136.765 is rejected, see bad_region.lst
The star  7506.706   204.627 is rejected, see bad_region.lst
The star  8481.699   222.171 is rejected, see bad_region.lst
The star  8310.520   233.607 is rejected, see bad_region.lst
The star  7877.783   249.332 is rejected, see bad_region.lst
The star  9143.997   307.990 is rejected, see bad_region.lst
The star  7574.392   323.751 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 1254
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 88
 * rejected close to frame edge: 8
 * 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): 3
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     1254 * 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 
815 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
815 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
815 * matched (3rd iteration). Success!
  rotation [degrees] = 179.372
     1254 stars detected,   815 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 656, N_manually_selected_comparison_stars = 0
Using 656 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 455 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00024*X_pix +0.00034*Y_pix -1.52139
ERROR in magnitude calibration: fabs(lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 455 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.53
 ERROR!!! Magnitude calibration failure. Dropping image. 
    25864 objects stored in memory (400000 max.)
memory:  119640 kB used, 128452 kB peak, 65263856 kB available RAM
processed 3 of 4 images ( 75.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-04T08:10:17.7540026
Setting observation time using DATE-OBS keyword: 2026-05-04T08:10:17.7540026

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-04T08:10:17.754
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-05-04_CI_Leo-06-Q2b1x1_031259_TTUQ2b1x1_479999_szkZg9bS/fd_Leo-06-Q2b1x1_2026-05-04_03-10-17_20.00sec_-4.90C_LIGHT_0097.fits
The star  7656.148    16.162 is rejected, see bad_region.lst
The star  8740.844   116.099 is rejected, see bad_region.lst
The star  8884.205   112.299 is rejected, see bad_region.lst
The star  7733.955   137.653 is rejected, see bad_region.lst
The star  8484.769   223.068 is rejected, see bad_region.lst
The star  8313.792   234.458 is rejected, see bad_region.lst
The star  7880.566   249.977 is rejected, see bad_region.lst
The star  8661.890   260.324 is rejected, see bad_region.lst
The star  9144.008   307.978 is rejected, see bad_region.lst
The star  7577.292   324.398 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 1192
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 85
 * rejected close to frame edge: 6
 * 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): 6
 * 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'.
     1192 * 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 
764 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
764 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
764 * matched (3rd iteration). Success!
  rotation [degrees] = 179.393
     1192 stars detected,   764 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 589, N_manually_selected_comparison_stars = 0
Using 589 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 529 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00015*X_pix +0.00021*Y_pix -1.15858
ERROR in magnitude calibration: fabs(lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 529 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.50
 ERROR!!! Magnitude calibration failure. Dropping image. 
    25864 objects stored in memory (400000 max.)
memory:  119640 kB used, 128452 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 48382 (48382 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  4234 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  6441 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  3580 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  2855 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  5408 stars

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

Computing, please wait a bit
...............................................................................................................................................................................................................................
vast_lightcurve_statistics.log: 22394 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)
_____________________
########### Completed Leo-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: Mon May  4 03:14:55 CDT 2026
=======================================
FIELD_Leo-06-Q2b1x1: 20s (0.33 min)
=======================================
TOTAL_RUNTIME: 23s (0.38 min)
Finished: Mon May  4 03:15:18 CDT 2026