ERROR running VaST on the field UMi-01-Q2b1x1 (wrong field? clouds? very bad focus?)
ERROR running VaST on the field UMi-01-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_2026-02-21.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= 500
NMW_CALIBRATION= /var/www/nmw_calibration
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_HARD_LIMIT= 3000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 2000
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: 
UMi-01-Q2b1x1
#######################################
########### Starting UMi-01-Q2b1x1 ###########
Processing UMi-01-Q2b1x1
server tau has sufficient free disk space available: 16981 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 16981 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.png' -> 'transient_report/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits_preview.png'

UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits


renamed 'UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.png' -> 'transient_report/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits_preview.png'

UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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= 624.5086
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 601.3415
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1023.4422
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 632.0140
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1023.2675
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 631.9935
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 1.6388
INFO:                  SECOND_EPOCH__SD_ratio= 0.000
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-02-21.fit
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                -15.0 / [degC] CCD temperature setpoint
CCD-TEMP=                -15.0 / [degC] CCD temperature
FOCTEMP =     19.4300003051758 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits 
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-03-22T02:37:17.9070230' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-03-22T07:37:17.9070230' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61121.3175683683 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-03-22T07:37:27.8068090' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =       61121.31768294 / 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=                -15.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                -15.0 / [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      =     239.998137122375 / [deg] RA of telescope" status=0
Record 32: "DEC     =     77.5000657523649 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     41.6480555555556 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     12.4102777777778 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.50293122504663 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'UMi-01'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '16 00 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+77 30 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  =                21951 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                21951 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     19.4300003051758 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     19.4300003051758 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 56: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 67: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits 9576 6388  16 bitpix
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
SET-TEMP= -15.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
CCD-TEMP= -14.900000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/d_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits :)

Spent 0.609597 seconds 
renamed 'mdark_TTUQ2b1x1_-15C_20s_2026-02-21.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/d_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-02-21.fit 9576 6388  16 bitpix
Avarage count on flat field image: 24427.345723
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits :)


No overscan detected - all values seem high! (left_median=17731.5, right_median=15896.5)
renamed 'mff_TTUQ2b1x1_2026-02-21.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                -15.0 / [degC] CCD temperature setpoint
CCD-TEMP=                -15.0 / [degC] CCD temperature
FOCTEMP =     19.3999996185303 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits 
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-03-22T02:38:14.4874446' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-03-22T07:38:14.4874446' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61121.3182232291 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-03-22T07:38:24.3889810' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61121.3183378242 / 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=                -15.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                -15.0 / [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      =     239.998136911499 / [deg] RA of telescope" status=0
Record 32: "DEC     =     77.5000657136961 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =                41.69 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     12.3711111111111 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.50170062434963 / Airmass at frame center (Gueymard 1993)" status=0
Record 36: "PIERSIDE= 'West'               / Telescope pointing state" status=0
Record 37: "SITEELEV=               1009.5 / [m] Observation site elevation" status=0
Record 38: "SITELAT =           33.7482925 / [deg] Observation site latitude" status=0
Record 39: "SITELONG=          -101.958319 / [deg] Observation site longitude" status=0
Record 40: "OBSERVER= 'Sokolovsky'         / Observer name" status=0
Record 41: "OBSERVAT= 'TTU Skyview'        / Observatory name" status=0
Record 42: "SITENAME= ''                   / Observatory site name" status=0
Record 43: "FWHEEL  = 'Simulator'          / Filter Wheel name" status=0
Record 44: "FILTER  = 'CV'                 / Active filter name" status=0
Record 45: "OBJECT  = 'UMi-01'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '16 00 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+77 30 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  =                21951 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                21951 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     19.3999996185303 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     19.3999996185303 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 56: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 67: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits 9576 6388  16 bitpix
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
SET-TEMP= -15.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
CCD-TEMP= -14.900000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-02-21.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/d_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits :)

Spent 0.539793 seconds 
renamed 'mdark_TTUQ2b1x1_-15C_20s_2026-02-21.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/d_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-02-21.fit 9576 6388  16 bitpix
Avarage count on flat field image: 24427.345723
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits :)


No overscan detected - all values seem high! (left_median=17731.5, right_median=15896.5)
renamed 'mff_TTUQ2b1x1_2026-02-21.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
Previews of the CALIBRATED second-epoch images:


fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits



fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
  
Last  image: 2461121.81768411 22.03.2026 07:37:17.907 UTC
ERROR running VaST on the field UMi-01-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____

--==VaST 1.0rc89==--

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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5)...  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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (defined in bad_region.lst)
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (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_image00001.cat  /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits > image00001.cat.sex_log 2>&1
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits
The above guess is based on the non-default gain value specified in default.sex by user
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
The above guess is based on the non-default gain value specified in default.sex by user
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (defined in bad_region.lst)
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00secsex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits > image00003.cat.sex_log 2>&1_-15.00C_LIGHT_0619.fits

Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
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  2000.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits > image00004.cat.sex_log 2>&1
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_image00002.cat  /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits > image00002.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 5.9,5.9,5.3,6.5,7.1,7.7 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits > image00001.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 6.0,6.0,5.4,6.6,7.2,7.8 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits > image00002.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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: 2025-12-23T11:21:39.7540867
Setting observation time using DATE-OBS keyword: 2025-12-23T11:21:39.7540867

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2025-12-23T11:21:39.754
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
Exposure 20 sec, 23.12.2025 11:21:39.754 UTC = JD(UTC) 2461032.97349252 mid. exp.
The reference image star  8486.800    45.694 is rejected, see bad_region.lst
The reference image star  7695.223    28.501 is rejected, see bad_region.lst
The reference image star  9425.547    13.300 is rejected, see bad_region.lst
The reference image star  8439.336    11.643 is rejected, see bad_region.lst
The reference image star  7509.965     8.306 is rejected, see bad_region.lst
The reference image star  7530.025     6.876 is rejected, see bad_region.lst
The reference image star  8695.557     3.170 is rejected, see bad_region.lst
The reference image star  8653.783     1.461 is rejected, see bad_region.lst
The reference image star  8015.221     1.153 is rejected, see bad_region.lst
The reference image star  8950.081    17.089 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: 8435, (8434 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: 1981
 * rejected close to frame edge: 31
 * rejected as being too small (<1.5 pix): 0
 * rejected as being too large (>5.9 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 1
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.

Please note: the CCD position-dependent magnitude correction will not be applied.
get_detection_limit_sn(): Detection limit: -7.57
Detection limit from the magnitude-SNR relation= -7.6  (5.0 sigma detection)
The simple faintest star detection limit= -9.6
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:    10.06.0 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): 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'.
     8451 * detected, using  501/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000710, number_of_ambiguous_matches=6 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000710, number_of_ambiguous_matches=6 
7964 * matched, fraction_of_ambiguous_matches= 0.000710, number_of_ambiguous_matches=6 
7964 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000710, number_of_ambiguous_matches=6 
7964 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.000
     8451 stars detected,  7964 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 7377, N_manually_selected_comparison_stars = 0
Using 7377 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 7376 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.59
     8922 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  103088 kB used, 114720 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.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: 2026-03-22T07:37:17.9070230
Setting observation time using DATE-OBS keyword: 2026-03-22T07:37:17.9070230

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-03-22T07:37:17.907
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
The star  8342.981    17.727 is rejected, see bad_region.lst
The star  8451.130     1.340 is rejected, see bad_region.lst
The star  8346.358     2.547 is rejected, see bad_region.lst
The star  7593.776     1.485 is rejected, see bad_region.lst
The star  7902.964     1.788 is rejected, see bad_region.lst
The star  7547.901    23.482 is rejected, see bad_region.lst
The star  8077.565    29.388 is rejected, see bad_region.lst
The star  8711.180    25.761 is rejected, see bad_region.lst
The star  8596.561    24.358 is rejected, see bad_region.lst
The star  8218.984    41.164 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 9221
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 2254
 * rejected close to frame edge: 37
 * 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): 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'.
     9221 * detected, using  546/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 64 < 3457 ! Retrying...
  rotation [degrees] =  11.668
     9221 stars detected,    64 stars matched
ERROR! Too few stars matched (64 < 3457) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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: 2026-03-22T07:38:14.4874446
Setting observation time using DATE-OBS keyword: 2026-03-22T07:38:14.4874446

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-03-22T07:38:14.487
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
The star  7545.708    18.744 is rejected, see bad_region.lst
The star  8340.743    12.855 is rejected, see bad_region.lst
The star  9224.763     8.750 is rejected, see bad_region.lst
The star  8075.376    24.591 is rejected, see bad_region.lst
The star  8708.797    20.865 is rejected, see bad_region.lst
The star  8594.202    19.524 is rejected, see bad_region.lst
The star  8216.780    36.324 is rejected, see bad_region.lst
The star  7589.781    33.682 is rejected, see bad_region.lst
The star  8466.012    28.518 is rejected, see bad_region.lst
The star  9517.472    29.788 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 9228
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 2268
 * rejected close to frame edge: 42
 * 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): 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'.
     9228 * detected, using  547/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 67 < 3457 ! Retrying...
  rotation [degrees] = 177.217
     9228 stars detected,    67 stars matched
ERROR! Too few stars matched (67 < 3457) . Wrong match? Skipping file...
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 16886 (16886 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  1645 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  2473 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  1263 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for   960 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  1623 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: 7880 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 41 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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
  
Last  image: 2461121.81768411 22.03.2026 07:37:17.907 UTC
ERROR running VaST on the field UMi-01-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____

--==VaST 1.0rc89==--

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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5)...  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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (defined in bad_region.lst)
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (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_image00001.cat  /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits > image00001.cat.sex_log 2>&1
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.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/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
The above guess is baExcluding image region:  7500.0     0.0  9576.0  2000.0  (defined in bad_region.lst)
sed on the non-default gain value specified in default.sex by user
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_image00002.cat  /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits > image00002.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
Excluding image region:    -1.0    -1.0     1.0     1.0  (defined in bad_region.lst)
Excluding image region:  8500.0     0.0  9576.0  6388.0  (defined in bad_region.lst)
Excluding image region:  7500.0     0.0  9576.0  2000.0  (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_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.2,5.6,6.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits > image00002.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.1,5.6,6.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits > image00001.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 5.0,5.0,4.5,5.5,6.0,6.5 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 5.0,5.0,4.5,5.5,6.0,6.5 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-22-23_20.00sec_-15.00C_LIGHT_0619.fits
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
Waiting for thread 2 to finish...
Waiting for thread 1 to finish...


Done with SExtractor!

TIMING SExtractor: 18 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/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.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: 2025-12-23T11:21:39.7540867
Setting observation time using DATE-OBS keyword: 2025-12-23T11:21:39.7540867

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2025-12-23T11:21:39.754
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/UMi-01-Q2b1x1_2025-12-23_05-21-39_20.00sec_-15.00C_LIGHT_0618.fits
Exposure 20 sec, 23.12.2025 11:21:39.754 UTC = JD(UTC) 2461032.97349252 mid. exp.
The reference image star  8486.800    45.694 is rejected, see bad_region.lst
The reference image star  7695.223    28.501 is rejected, see bad_region.lst
The reference image star  8950.081    17.091 is rejected, see bad_region.lst
The reference image star  8342.198    15.390 is rejected, see bad_region.lst
The reference image star  8322.482    13.940 is rejected, see bad_region.lst
The reference image star  9425.546    13.301 is rejected, see bad_region.lst
The reference image star  8439.335    11.643 is rejected, see bad_region.lst
The reference image star  7753.074    11.880 is rejected, see bad_region.lst
The reference image star  9317.044     9.783 is rejected, see bad_region.lst
The reference image star  8558.335    10.908 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: 51107, (51106 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 21
 * rejected inside rectangles defined in bad_region.lst: 8628
 * rejected close to frame edge: 222
 * 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): 37
 * 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: -7.29
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:    10.04.7 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'.
    50745 * detected, using  496/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.002152, number_of_ambiguous_matches=110 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.002152, number_of_ambiguous_matches=110 
47186 * matched, fraction_of_ambiguous_matches= 0.002152, number_of_ambiguous_matches=110 
47186 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.002152, number_of_ambiguous_matches=110 
47186 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.000
    50745 stars detected, 47186 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 44343, N_manually_selected_comparison_stars = 0
Using 44343 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 44338 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00123
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 42342 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.29
    54666 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  138080 kB used, 151608 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.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: 2026-03-22T07:37:17.9070230
Setting observation time using DATE-OBS keyword: 2026-03-22T07:37:17.9070230

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-03-22T07:37:17.907
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-37-17_20.00sec_-15.00C_LIGHT_0212.fits
The star  8077.568    29.388 is rejected, see bad_region.lst
The star  7547.899    23.483 is rejected, see bad_region.lst
The star  8342.978    17.727 is rejected, see bad_region.lst
The star  8414.138    14.608 is rejected, see bad_region.lst
The star  9227.239    13.721 is rejected, see bad_region.lst
The star  8116.115     9.458 is rejected, see bad_region.lst
The star  8485.534     9.443 is rejected, see bad_region.lst
The star  7834.855     9.133 is rejected, see bad_region.lst
The star  8830.373     6.323 is rejected, see bad_region.lst
The star  8451.120     1.345 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 51071
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 24
 * rejected inside rectangles defined in bad_region.lst: 7474
 * rejected close to frame edge: 185
 * 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): 103
 * 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'.
    51071 * detected, using  499/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.001720, number_of_ambiguous_matches=94 
Too few * matched: 2004 < 20939 ! Retrying...
  rotation [degrees] =  -1.008
    51071 stars detected,  2004 stars matched
ERROR! Too few stars matched (2004 < 20939) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.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: 2026-03-22T07:38:14.4874446
Setting observation time using DATE-OBS keyword: 2026-03-22T07:38:14.4874446

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-03-22T07:38:14.487
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-03-22_CI_UMi-01-Q2b1x1_033231_TTUQ2b1x1_30897_IM0j5eR5/fd_UMi-01-Q2b1x1_2026-03-22_02-38-14_20.00sec_-15.00C_LIGHT_0213.fits
The star  8075.376    24.591 is rejected, see bad_region.lst
The star  8708.797    20.866 is rejected, see bad_region.lst
The star  7545.707    18.745 is rejected, see bad_region.lst
The star  8594.195    19.523 is rejected, see bad_region.lst
The star  8340.743    12.856 is rejected, see bad_region.lst
The star  7527.743    11.719 is rejected, see bad_region.lst
The star  9224.755     8.755 is rejected, see bad_region.lst
The star  8411.736     9.777 is rejected, see bad_region.lst
The star  7693.173     7.889 is rejected, see bad_region.lst
The star  7652.432     6.863 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 51344
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 18
 * rejected inside rectangles defined in bad_region.lst: 7514
 * rejected close to frame edge: 199
 * 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): 109
 * 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'.
    51344 * detected, using  502/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000585, number_of_ambiguous_matches=32 
Too few * matched: 1662 < 20953 ! Retrying...
  rotation [degrees] =   1.038
    51344 stars detected,  1662 stars matched
ERROR! Too few stars matched (1662 < 20953) . Wrong match? Skipping file...
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 101852 (101852 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  7750 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 13328 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  8082 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  7268 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 10758 stars

done!  =)
TIMING select_aperture: 2 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: 46964 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 41 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 UMi-01-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO  ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is 500
############################################################
ls: cannot access 'planets.txt': No such file or directory
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT):
ls: cannot access 'moons.txt': No such file or directory
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT):
ls: cannot access 'spacecraft.txt': No such file or directory
############################################################
ls: cannot access 'comets.txt': No such file or directory
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
ls: cannot access 'asassn_transients_list.txt': No such file or directory
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
ls: cannot access 'tocp_transients_list.txt': No such file or directory

=== Transient Factory Profiling ===
Started: Sun Mar 22 03:44:38 CDT 2026
=======================================
FIELD_UMi-01-Q2b1x1: 55s (0.92 min)
=======================================
TOTAL_RUNTIME: 58s (0.97 min)
Finished: Sun Mar 22 03:45:36 CDT 2026