NMW transient search results

This analysis is done by the script util/transients/transient_factory_test31.sh /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV

The list of candidates will appear below. Please manually reload the page every few minutes untill the 'Processing complete' message appears.

Processing fields Cep-01-Q1b1x1

Processing complete!

Total number of candidates identified: 0

Processing log:

Filtering log:

######## Processing parameters ########
AAVSO_COMMENT_STRING= NMW-TexasTech Camera-1 135mm f/2.2 telephoto lens + QHY600M CMOS
ASTCHECK_ASTEROID_SEARCH_RADIUS_ARCSEC= 
BAD_REGION_FILE= /var/www/nmw_calibration/TTUQ1b1x1/TTUQ1_bad_region.lst
CAMERA_SETTINGS= TTUQ1b1x1
CHECK_POINTING_ACCURACY= yes
DARK_FRAMES_DIR_OR_FILE= /var/www/nmw_calibration/TTUQ1b1x1/darks
EXCLUSION_LIST= ../exclusion_list_TTUQ1.txt
FILTER_BAD_IMG__MAX_APERTURE_STAR_SIZE_PIX= 12.5
FILTER_BAD_IMG__MAX_ELONGATION_AminusB_PIX= 0.55
FILTER_BAD_IMG__MIN_APERTURE_STAR_SIZE_PIX= 2.0
FILTER_BRIGHT_MAG_CUTOFF_TRANSIENT_SEARCH= -5
FILTER_FAINT_MAG_CUTOFF_TRANSIENT_SEARCH= 15.5
FLAT_FIELD_DIR_OR_FILE= /var/www/nmw_calibration/TTUQ1b1x1/flats
FRAME_EDGE_OFFSET_PIX= 100
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= 10000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 8000
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= 3.5
SYSREM_ITERATIONS= 0
TELESCOP= 
TELESCOP_NAME_KNOWN_TO_VaST_FOR_FOV_DETERMINATION= 
UCAC5_PLATESOLVE_ITERATIONS= 2
FPACK_FULLY_CALIBRATED_IMAGE= no
#######################################
HOSTNAME= tau
USER= 
HOME= 
#######################################
SExtractor catalog cache: enabled, directory /data_ssd/NMW-TexasTech/vast_sextractor_cache
Reference image directory is set to /data_ssd/NMW-TexasTech/reference_imgs
VIZIER_SITE=vizier.cds.unistra.fr
GAIA_DR2_CLIENT=vizquery (lib/vizquery -> VizieR vizier.cds.unistra.fr)
INFO: MAKE_PNG_PLOTS is set to yes
FITS_FILE_EXT=fits
CALIBRATION_STATUS_PREFIX=
Fields in the data directory: 
Cep-01-Q1b1x1
#######################################
########### Starting Cep-01-Q1b1x1 ###########
Processing Cep-01-Q1b1x1
server tau has sufficient free disk space available: 418352 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 418352 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits
Small preview (one of the new images): 
Large previews of the second-epoch (new) images:
MAKE_PNG_PLOTS=yes
renamed 'Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.png' -> 'transient_report/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits_preview.png'
Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits

renamed 'Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.png' -> 'transient_report/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits_preview.png'
Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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= 680.1622 INFO: REFERENCE_EPOCH__FIRST_IMAGE_SD= 599.2678 INFO: SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1254.4995 INFO: SECOND_EPOCH__FIRST_IMAGE_SD= 622.5393 INFO: SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1257.3046 INFO: SECOND_EPOCH__SECOND_IMAGE_SD= 622.8944 ---------------------------------------------- INFO: ref_to_second_epoch_img_mean_ratio= 1.84441 INFO: SECOND_EPOCH__SD_ratio= 0.001 ---------------------------------------------- Calibration settings: DARK_FRAMES_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ1b1x1/darks FLAT_FIELD_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ1b1x1/flats EXPTIME = 20.0 / [s] Exposure duration SET-TEMP= 0.0 / [degC] CCD temperature setpoint CCD-TEMP= -0.0 / [degC] CCD temperature FOCTEMP = 26.2900009155273 / [degC] Focuser temperature AMBTEMP = 24.7 / [degC] Ambient air temperature Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.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= '2026-07-07T01:33:42.4976259' / Time of observation (local)" status=0 Record 12: "DATE-OBS= '2026-07-07T06:33:42.4976259' / Time of observation (UTC)" status=0 Record 13: "MJD-OBS = 61228.2734085303 / Modified Julian Date of observation" status=0 Record 14: "DATE-AVG= '2026-07-07T06:33:52.4020013' / Averaged midpoint time (UTC)" status=0 Record 15: "MJD-AVG = 61228.2735231714 / 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-33d3d743814b8b447' / Imaging instrument identifier" status=0 Record 24: "SET-TEMP= 0.0 / [degC] CCD temperature setpoint" status=0 Record 25: "CCD-TEMP= -0.0 / [degC] CCD temperature" status=0 Record 26: "READOUTM= '2CMS-0' / Sensor readout mode" status=0 Record 27: "USBLIMIT= 50 / Camera-specific USB setting" status=0 Record 28: "TELESCOP= 'QHY600M-TTU1' / 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 = 0.481950116568598 / [deg] RA of telescope" status=0 Record 32: "DEC = 84.9384952899969 / [deg] Declination of telescope" status=0 Record 33: "CENTALT = 34.5458333333333 / [deg] Altitude of telescope" status=0 Record 34: "CENTAZ = 5.86527777777778 / [deg] Azimuth of telescope" status=0 Record 35: "AIRMASS = 1.75991636043792 / Airmass at frame center (Gueymard 1993)" status=0 Record 36: "PIERSIDE= 'West' / Telescope pointing state" status=0 Record 37: "SITEELEV= 1015.0 / [m] Observation site elevation" status=0 Record 38: "SITELAT = 33.7480555555556 / [deg] Observation site latitude" status=0 Record 39: "SITELONG= -101.958333333333 / [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 = 'Cep-01' / Name of the object of interest" status=0 Record 46: "OBJCTRA = '00 00 00' / [H M S] RA of imaged object" status=0 Record 47: "OBJCTDEC= '+85 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 = 29478 / [step] Focuser position" status=0 Record 51: "FOCUSPOS= 29478 / [step] Focuser position" status=0 Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0 Record 53: "FOCTEMP = 26.2900009155273 / [degC] Focuser temperature" status=0 Record 54: "FOCUSTEM= 26.2900009155273 / [degC] Focuser temperature" status=0 Record 55: "DEWPOINT= 15.9 / [degC] Dew point" status=0 Record 56: "HUMIDITY= 58.0 / [percent] Relative humidity" status=0 Record 57: "PRESSURE= 903.49 / [hPa] Air pressure" status=0 Record 58: "AMBTEMP = 24.7 / [degC] Ambient air temperature" status=0 Record 59: "WINDDIR = 41.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0 Record 60: "WINDGUST= 13.00104 / [kph] Wind gust" status=0 Record 61: "WINDSPD = 6.50052 / [kph] Wind speed" status=0 Record 62: "ROWORDER= 'TOP-DOWN' / FITS Image Orientation" status=0 Record 63: "EQUINOX = 2000.0 / Equinox of celestial coordinate system" status=0 Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0 Record 65: "QHY_EXP = 20.000096 / [s] Actual exposure time" status=0 Record 66: "QHY_PP = 13888.0 / [ps] pixelPeriod" status=0 Record 67: "QHY_LP = 85000.0 / [ns] linePeriod" status=0 Record 68: "GPS_LP = 85000.0 / [ns] linePeriod" status=0 Record 69: "QHY_FP = 20000160.0 / [us] framePeriod" status=0 Record 70: "QHY_CPL = 6120.0 / clocksPerLine" status=0 Record 71: "QHY_LPF = 235295.0 / linesPerFrame" status=0 Record 72: "QHY_AET = 20000096.0 / [us] actualExposureTime" status=0 Record 73: "QHY_LEM = T / isLongExposureMode" status=0 Record 74: "QHY_OFF0= 3767.777 / [us] RollingShutterEndOffset row 0" status=0 Allocating memory for image, dark and result arrays... Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits 9576 6388 16 bitpix SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit Reading dark frame /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit 9576 6388 16 bitpix Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/d_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits :) Spent 0.554554 seconds renamed 'mdark_TTUQ1b1x1_5C_20s_2026-05-30.png' -> 'transient_report/dark.png' try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ1b1x1/flats/mff_TTUQ1b1x1_2026-05-30.fit from directory /var/www/nmw_calibration/TTUQ1b1x1/flats MegaDivider v7 Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/d_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits 9576 6388 16 bitpix Reading flat /var/www/nmw_calibration/TTUQ1b1x1/flats/mff_TTUQ1b1x1_2026-05-30.fit 9576 6388 16 bitpix Avarage count on flat field image: 31267.409145 Minimal real count (from overscan): 5 Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits :) No overscan detected - all values seem high! (left_median=21677.0, right_median=21704.0) renamed 'mff_TTUQ1b1x1_2026-05-30.png' -> 'transient_report/flat.png' Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits EXPTIME = 20.0 / [s] Exposure duration SET-TEMP= 0.0 / [degC] CCD temperature setpoint CCD-TEMP= -0.0 / [degC] CCD temperature FOCTEMP = 26.2900009155273 / [degC] Focuser temperature AMBTEMP = 24.7 / [degC] Ambient air temperature Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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= '2026-07-07T01:34:47.3028971' / Time of observation (local)" status=0 Record 12: "DATE-OBS= '2026-07-07T06:34:47.3028971' / Time of observation (UTC)" status=0 Record 13: "MJD-OBS = 61228.2741585881 / Modified Julian Date of observation" status=0 Record 14: "DATE-AVG= '2026-07-07T06:34:57.2046054' / Averaged midpoint time (UTC)" status=0 Record 15: "MJD-AVG = 61228.2742731944 / 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-33d3d743814b8b447' / Imaging instrument identifier" status=0 Record 24: "SET-TEMP= 0.0 / [degC] CCD temperature setpoint" status=0 Record 25: "CCD-TEMP= -0.0 / [degC] CCD temperature" status=0 Record 26: "READOUTM= '2CMS-0' / Sensor readout mode" status=0 Record 27: "USBLIMIT= 50 / Camera-specific USB setting" status=0 Record 28: "TELESCOP= 'QHY600M-TTU1' / 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 = 0.481949359556408 / [deg] RA of telescope" status=0 Record 32: "DEC = 84.9384952648152 / [deg] Declination of telescope" status=0 Record 33: "CENTALT = 34.5683333333333 / [deg] Altitude of telescope" status=0 Record 34: "CENTAZ = 5.86138888888889 / [deg] Azimuth of telescope" status=0 Record 35: "AIRMASS = 1.75891914398078 / Airmass at frame center (Gueymard 1993)" status=0 Record 36: "PIERSIDE= 'West' / Telescope pointing state" status=0 Record 37: "SITEELEV= 1015.0 / [m] Observation site elevation" status=0 Record 38: "SITELAT = 33.7480555555556 / [deg] Observation site latitude" status=0 Record 39: "SITELONG= -101.958333333333 / [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 = 'Cep-01' / Name of the object of interest" status=0 Record 46: "OBJCTRA = '00 00 00' / [H M S] RA of imaged object" status=0 Record 47: "OBJCTDEC= '+85 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 = 29478 / [step] Focuser position" status=0 Record 51: "FOCUSPOS= 29478 / [step] Focuser position" status=0 Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0 Record 53: "FOCTEMP = 26.2900009155273 / [degC] Focuser temperature" status=0 Record 54: "FOCUSTEM= 26.2900009155273 / [degC] Focuser temperature" status=0 Record 55: "DEWPOINT= 15.9 / [degC] Dew point" status=0 Record 56: "HUMIDITY= 58.0 / [percent] Relative humidity" status=0 Record 57: "PRESSURE= 903.49 / [hPa] Air pressure" status=0 Record 58: "AMBTEMP = 24.7 / [degC] Ambient air temperature" status=0 Record 59: "WINDDIR = 41.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0 Record 60: "WINDGUST= 13.00104 / [kph] Wind gust" status=0 Record 61: "WINDSPD = 6.50052 / [kph] Wind speed" status=0 Record 62: "ROWORDER= 'TOP-DOWN' / FITS Image Orientation" status=0 Record 63: "EQUINOX = 2000.0 / Equinox of celestial coordinate system" status=0 Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0 Record 65: "QHY_EXP = 20.000096 / [s] Actual exposure time" status=0 Record 66: "QHY_PP = 13888.0 / [ps] pixelPeriod" status=0 Record 67: "QHY_LP = 85000.0 / [ns] linePeriod" status=0 Record 68: "GPS_LP = 85000.0 / [ns] linePeriod" status=0 Record 69: "QHY_FP = 20000160.0 / [us] framePeriod" status=0 Record 70: "QHY_CPL = 6120.0 / clocksPerLine" status=0 Record 71: "QHY_LPF = 235295.0 / linesPerFrame" status=0 Record 72: "QHY_AET = 20000096.0 / [us] actualExposureTime" status=0 Record 73: "QHY_LEM = T / isLongExposureMode" status=0 Record 74: "QHY_OFF0= 3767.777 / [us] RollingShutterEndOffset row 0" status=0 Allocating memory for image, dark and result arrays... Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits 9576 6388 16 bitpix SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit Reading dark frame /var/www/nmw_calibration/TTUQ1b1x1/darks/mdark_TTUQ1b1x1_5C_20s_2026-05-30.fit 9576 6388 16 bitpix Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/d_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits :) Spent 0.729555 seconds renamed 'mdark_TTUQ1b1x1_5C_20s_2026-05-30.png' -> 'transient_report/dark.png' try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ1b1x1/flats/mff_TTUQ1b1x1_2026-05-30.fit from directory /var/www/nmw_calibration/TTUQ1b1x1/flats MegaDivider v7 Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/d_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits 9576 6388 16 bitpix Reading flat /var/www/nmw_calibration/TTUQ1b1x1/flats/mff_TTUQ1b1x1_2026-05-30.fit 9576 6388 16 bitpix Avarage count on flat field image: 31267.409145 Minimal real count (from overscan): 5 Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits :) No overscan detected - all values seem high! (left_median=21677.0, right_median=21704.0) renamed 'mff_TTUQ1b1x1_2026-05-30.png' -> 'transient_report/flat.png' Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Previews of the CALIBRATED second-epoch images:

fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits


fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits


Updating neverexclude_list.txt '/var/www/nmw_calibration/neverexclude_list.txt' -> './neverexclude_list.txt' Choosing bad regions list '/var/www/nmw_calibration/TTUQ1b1x1/TTUQ1_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 3.5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Last image: 2461228.77352427 07.07.2026 06:33:42.497 UTC ERROR running VaST on the field Cep-01-Q1b1x1 (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': 3.500000 pix is the new fixed star matching radius! opt 'b': Using 500 reference stars for image matching! opt '3': Will try to select best aperture for each source! opt 'y': 0 SysRem iterations will be conducted! opt 't 4': robust linear magnitude calibration (vary zero-point and slope) opt 'x': 99 is the maximum acceptable SExtractor flag! WARNING: disabling the mag-size filter in order not to reject blended stars. opt 'u': Stick with UTC time system, no conversion to TT will be done! opt 'f': Run ./find_candidates manually! opt 'k': "JD" keyword in FITS image header will be ignored! INFO from vast_remove_directory(): Could not open directory: symlinks_to_images INFO from vast_remove_directory(): Could not open directory: converted_images INFO from vast_remove_directory(): Could not open directory: unpacked_images Checking the list of input images specified on the command line ... Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found. This is OK if you specify the input images on the command line, not through this text file. Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV)... 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 3.5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 image regions (defined in bad_region.lst). Setting the fixed star match radius of 3.50 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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.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/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.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/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits The above guess is based on the non-default gain value specified in default.sex by user Excluded a total of 50 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_image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits > image00002.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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits The above guess is bautodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1ased on the non-default gain value specified in default.sex by user _656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits > image00003.cat.sex_log 2>&1 autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits > image00004.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.8,7.4,8.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits > image00001.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.8,7.4,8.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits > image00002.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 7.3,7.3,6.6,8.0,8.7,9.5 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits > image00003.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 7.3,7.3,6.6,8.0,8.8,9.5 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits > image00004.cat.sex_log 2>&1 autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits Waiting for thread 2 to finish... Waiting for thread 1 to finish... Done with SExtractor! TIMING SExtractor: 8 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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Trying to guess the time system by parsing the comment string 'Time of observation (UTC)' Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)' The input time system is identified as: UTC (blank if unknown) Setting observation date using DATE-OBS keyword: 2026-01-18T06:13:58.8960323 Setting observation time using DATE-OBS keyword: 2026-01-18T06:13:58.8960323 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-01-18T06:13:58.896 EXPTIME = 20.000 Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Exposure 20 sec, 18.01.2026 06:13:58.896 UTC = JD(UTC) 2461058.75982519 mid. exp. SExtractor output filtering results: * passed selection: 11839, (11839 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: 0 * rejected close to frame edge: 75 * rejected as being too small (<1.6 pix): 0 * rejected as being too large (>6.2 pix): 0 * rejected as outliers in mag-size plot: 0 * rejected as having SExtractor flags > 99 and <= 7: 0 * rejected as having hopelessly bad SExtractor flags (>7): 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'. Please note: the CCD position-dependent magnitude correction will be applied. get_detection_limit_sn(): Detection limit: -7.70 Detection limit from the magnitude-SNR relation= -7.7 (5.0 sigma detection) The simple faintest star detection limit= -9.7 80 percent brightest stars detection limit= -10.6 Selected detection limit= -10.6 Final detection limit= -10.6 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0) Parameter box for transient search: 10.06.2 pix): 0 * rejected as outliers in mag-size plot: 0 * rejected as having SExtractor flags > 99 and <= 7: 0 * rejected as having hopelessly bad SExtractor flags (>7): 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'. 11811 * detected, using 498/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000760, number_of_ambiguous_matches=9 refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000760, number_of_ambiguous_matches=9 11203 * matched, fraction_of_ambiguous_matches= 0.000760, number_of_ambiguous_matches=9 11203 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000760, number_of_ambiguous_matches=9 11203 * matched (3rd iteration). Success! rotation [degrees] = 0.012 11811 stars detected, 11203 stars matched Performing magnitude calibration using automatically selected comparison stars Expecting to find at least 40 * for magnitude calibration We have N_good_stars = 10388, N_manually_selected_comparison_stars = 0 Using 10388 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 10388 stars for magnitude calibration. Using the linear CCD position-dependent magnitude correction: delta_m = -0.00000*X_pix -0.00000*Y_pix +0.00109 Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)... Computing robust linear magnitude calibration. Used 10387 stars for magnitude calibration (after filtering). get_detection_limit_sn(): Detection limit: -7.70 12447 objects stored in memory (400000 max.) Magnitude calibration is performed successfully! Saving observations to the cache... OK memory: 104248 kB used, 116780 kB peak, 65263848 kB available RAM processed 2 of 4 images ( 50.0%) Processing /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.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: 2026-07-07T06:33:42.4976259 Setting observation time using DATE-OBS keyword: 2026-07-07T06:33:42.4976259 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-07-07T06:33:42.497 EXPTIME = 20.000 Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits SExtractor output filtering results: * passed selection: 11788 * rejected as having no flux measurement: 0 * rejected as having SNR<3.0: 0 * rejected inside rectangles defined in bad_region.lst: 0 * rejected close to frame edge: 51 * rejected as being too small (<1.8 pix): 0 * rejected as being too large (>7.3 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): 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'. 11788 * detected, using 497/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 Too few * matched: 74 < 2357 ! Retrying... rotation [degrees] = 4.420 11788 stars detected, 74 stars matched ERROR! Too few stars matched (74 < 2357) . Wrong match? Skipping file... Processing /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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: 2026-07-07T06:34:47.3028971 Setting observation time using DATE-OBS keyword: 2026-07-07T06:34:47.3028971 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-07-07T06:34:47.302 EXPTIME = 20.000 Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits SExtractor output filtering results: * passed selection: 11680 * rejected as having no flux measurement: 0 * rejected as having SNR<3.0: 0 * rejected inside rectangles defined in bad_region.lst: 0 * rejected close to frame edge: 40 * rejected as being too small (<1.8 pix): 0 * rejected as being too large (>7.3 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): 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'. 11680 * detected, using 493/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 Too few * matched: 16 < 2336 ! Retrying... rotation [degrees] = -11.454 11680 stars detected, 16 stars matched ERROR! Too few stars matched (16 < 2336) . Wrong match? Skipping file... TIMING matching_and_photometry: 2 seconds Done with measurements! =) Total number of measurements 23650 (23650 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 2774 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 3325 stars Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 1264 stars Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 1463 stars Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 2377 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: 11108 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 3.5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Last image: 2461228.77352427 07.07.2026 06:33:42.497 UTC ERROR running VaST on the field Cep-01-Q1b1x1 (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': 3.500000 pix is the new fixed star matching radius! opt 'b': Using 500 reference stars for image matching! opt '3': Will try to select best aperture for each source! opt 'y': 0 SysRem iterations will be conducted! opt 't 4': robust linear magnitude calibration (vary zero-point and slope) opt 'x': 99 is the maximum acceptable SExtractor flag! WARNING: disabling the mag-size filter in order not to reject blended stars. opt 'u': Stick with UTC time system, no conversion to TT will be done! opt 'f': Run ./find_candidates manually! opt 'k': "JD" keyword in FITS image header will be ignored! INFO from vast_remove_directory(): Could not open directory: symlinks_to_images INFO from vast_remove_directory(): Could not open directory: converted_images INFO from vast_remove_directory(): Could not open directory: unpacked_images Checking the list of input images specified on the command line ... Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found. This is OK if you specify the input images on the command line, not through this text file. Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV)... 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 3.5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 image regions (defined in bad_region.lst). Setting the fixed star match radius of 3.50 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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.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/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits The above guess is based on the non-default gain value specified in default.sex by user The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 image regions (defined in bad_region.lst). autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00secautodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size _-15.00C_LIGHT_0262.fits sex -c default.sex -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits > image00003.cat.sex_log 2>&1 Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Excluding image region: 190.0 1039.0 192.0 1041.0 (defined in bad_region.lst) Excluding image region: 226.0 1548.0 228.0 1550.0 (defined in bad_region.lst) Excluding image region: 351.0 1875.0 353.0 1877.0 (defined in bad_region.lst) Excluding image region: 501.0 5912.0 503.0 5914.0 (defined in bad_region.lst) Excluding image region: 638.0 5545.0 640.0 5547.0 (defined in bad_region.lst) Excluding image region: 724.0 2731.0 726.0 2733.0 (defined in bad_region.lst) Excluding image region: 883.0 1376.0 885.0 1378.0 (defined in bad_region.lst) Excluding image region: 901.0 3972.0 903.0 3974.0 (defined in bad_region.lst) Excluding image region: 1151.0 918.0 1153.0 920.0 (defined in bad_region.lst) Excluding image region: 1157.0 135.0 1159.0 137.0 (defined in bad_region.lst) Excluding more image regions!.. (will not print them all) Excluded a total of 50 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_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits > image00004.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.1,6.1,5.5,6.7,7.3,7.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits > image00003.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.0,6.0,5.4,6.6,7.3,7.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits > image00004.cat.sex_log 2>&1 autodetect_aperture() is doing the main SExtractor run sex -PARAMETERS_NAME default.param -PHOT_APERTURES 4.7,4.7,4.2,5.1,5.6,6.0 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00001.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits > image00001.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 image00002.cat /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits > image00002.cat.sex_log 2>&1 autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.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/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits Waiting for thread 2 to finish... autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-14-40_20.00sec_-15.00C_LIGHT_0262.fits Waiting for thread 1 to finish... Done with SExtractor! TIMING SExtractor: 38 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/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Trying to guess the time system by parsing the comment string 'Time of observation (UTC)' Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)' The input time system is identified as: UTC (blank if unknown) Setting observation date using DATE-OBS keyword: 2026-01-18T06:13:58.8960323 Setting observation time using DATE-OBS keyword: 2026-01-18T06:13:58.8960323 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-01-18T06:13:58.896 EXPTIME = 20.000 Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-01-Q1b1x1_2026-01-18_00-13-58_20.00sec_-15.00C_LIGHT_0261.fits Exposure 20 sec, 18.01.2026 06:13:58.896 UTC = JD(UTC) 2461058.75982519 mid. exp. The reference image star 6733.381 1623.732 is rejected, see bad_region.lst The reference image star 2858.750 5864.681 is rejected, see bad_region.lst The reference image star 2317.998 4331.981 is rejected, see bad_region.lst SExtractor output filtering results: * passed selection: 78366, (78366 good for image matching) * rejected as having no flux measurement: 0 * rejected as having SNR<3.0: 27 * rejected inside rectangles defined in bad_region.lst: 3 * rejected close to frame edge: 410 * 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): 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'. Please note: the CCD position-dependent magnitude correction will be applied. get_detection_limit_sn(): Detection limit: -7.38 Detection limit from the magnitude-SNR relation= -7.4 (5.0 sigma detection) The simple faintest star detection limit= -6.6 80 percent brightest stars detection limit= -7.9 Selected detection limit= -7.9 Final detection limit= -7.9 (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): 104 * 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'. 78474 * detected, using 500/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.002268, number_of_ambiguous_matches=178 refining the coordinate transformation... fraction_of_ambiguous_matches= 0.002268, number_of_ambiguous_matches=178 71954 * matched, fraction_of_ambiguous_matches= 0.002268, number_of_ambiguous_matches=178 71954 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.002268, number_of_ambiguous_matches=178 71954 * matched (3rd iteration). Success! rotation [degrees] = 0.012 78474 stars detected, 71954 stars matched Performing magnitude calibration using automatically selected comparison stars Expecting to find at least 40 * for magnitude calibration We have N_good_stars = 66612, N_manually_selected_comparison_stars = 0 Using 66612 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 66610 stars for magnitude calibration. Using the linear CCD position-dependent magnitude correction: delta_m = 0.00000*X_pix +0.00000*Y_pix -0.00300 Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)... Computing robust linear magnitude calibration. Used 63529 stars for magnitude calibration (after filtering). get_detection_limit_sn(): Detection limit: -7.38 84886 objects stored in memory (400000 max.) Magnitude calibration is performed successfully! Saving observations to the cache... OK memory: 151200 kB used, 172036 kB peak, 65263848 kB available RAM processed 2 of 4 images ( 50.0%) Processing /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.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: 2026-07-07T06:33:42.4976259 Setting observation time using DATE-OBS keyword: 2026-07-07T06:33:42.4976259 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-07-07T06:33:42.497 EXPTIME = 20.000 Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-33-42_20.00sec_-0.00C_LIGHTs_0240.fits The star 8225.995 235.070 is rejected, see bad_region.lst The star 8497.975 871.969 is rejected, see bad_region.lst The star 1151.978 919.039 is rejected, see bad_region.lst The star 3619.020 1436.996 is rejected, see bad_region.lst The star 227.160 1548.971 is rejected, see bad_region.lst The star 6736.003 1626.948 is rejected, see bad_region.lst The star 351.973 1876.021 is rejected, see bad_region.lst The star 2636.230 2108.003 is rejected, see bad_region.lst The star 1893.015 2203.001 is rejected, see bad_region.lst The star 4923.007 2427.988 is rejected, see bad_region.lst Excluding more stars falling at bad regions!.. (will not print them all) SExtractor output filtering results: * passed selection: 58318 * rejected as having no flux measurement: 0 * rejected as having SNR<3.0: 34 * rejected inside rectangles defined in bad_region.lst: 27 * rejected close to frame edge: 263 * rejected as being too small (<1.5 pix): 0 * rejected as being too large (>6.1 pix): 0 * rejected as outliers in mag-size plot: 0 * rejected as having SExtractor flags > 99 and <= 7: 0 * rejected as having hopelessly bad SExtractor flags (>7): 60 * 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'. 58318 * detected, using 372/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000141, number_of_ambiguous_matches=12 Too few * matched: 2745 < 11663 ! Retrying... rotation [degrees] = -0.560 58318 stars detected, 2745 stars matched ERROR! Too few stars matched (2745 < 11663) . Wrong match? Skipping file... Processing /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits 9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.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: 2026-07-07T06:34:47.3028971 Setting observation time using DATE-OBS keyword: 2026-07-07T06:34:47.3028971 Observing time converted to the "standard" FITS header format: DATE-OBS= 2026-07-07T06:34:47.302 EXPTIME = 20.000 Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-07_CI_Cep-01-Q1b1x1_015032_TTUQ1b1x1_656242_aocy03dV/fd_Cep-01-Q1b1x1_2026-07-07_01-34-47_20.00sec_-0.00C_LIGHTs_0241.fits The star 8498.043 872.039 is rejected, see bad_region.lst The star 3618.985 1437.006 is rejected, see bad_region.lst The star 6736.074 1627.023 is rejected, see bad_region.lst The star 351.961 1876.340 is rejected, see bad_region.lst The star 8839.008 2030.040 is rejected, see bad_region.lst The star 4923.018 2428.003 is rejected, see bad_region.lst The star 1457.363 3135.322 is rejected, see bad_region.lst The star 1454.884 3133.001 is rejected, see bad_region.lst The star 1961.704 3339.126 is rejected, see bad_region.lst The star 9337.012 3591.011 is rejected, see bad_region.lst Excluding more stars falling at bad regions!.. (will not print them all) SExtractor output filtering results: * passed selection: 58499 * rejected as having no flux measurement: 0 * rejected as having SNR<3.0: 16 * rejected inside rectangles defined in bad_region.lst: 19 * rejected close to frame edge: 249 * rejected as being too small (<1.5 pix): 0 * rejected as being too large (>6.0 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): 61 * 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'. 58499 * detected, using 373/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000071, number_of_ambiguous_matches=6 Too few * matched: 581 < 11699 ! Retrying... rotation [degrees] = -3.125 58499 stars detected, 581 stars matched ERROR! Too few stars matched (581 < 11699) . Wrong match? Skipping file... TIMING matching_and_photometry: 2 seconds Done with measurements! =) Total number of measurements 156840 (156840 measurements stored in RAM) Freeing up some memory... Sorting the measurements cached in memory... Writing lightcurve (outNNNNN.dat) files... TIMING lightcurve_write: 2 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 12126 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 20954 stars Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 11184 stars Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 9326 stars Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 18364 stars done! =) TIMING select_aperture: 4 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: 71632 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 Cep-01-Q1b1x1 ########### The analysis was running at tau We are allowed to update the exclusion list at tau host Found ../exclusion_list_TTUQ1.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

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