######## 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_2026-03-20.fit
FRAME_EDGE_OFFSET_PIX= 600
GAIA_BAND_FOR_CATALOGED_SOURCE_CHECK= 
MAX_NEW_TO_REF_MEAN_IMG_VALUE_RATIO= 100
MAX_NEW_IMG_MEAN_VALUE= 25000
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS= 0.18
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS_SOFT_LIMIT= 0.12
MPC_CODE= V36
NMW_CALIBRATION= /var/www/nmw_calibration
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_HARD_LIMIT= 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: 
Cep-02-Q2b1x1
#######################################
########### Starting Cep-02-Q2b1x1 ###########
Processing Cep-02-Q2b1x1
server tau has sufficient free disk space available: 678131 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 678131 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.png' -> 'transient_report/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits_preview.png'

Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits


renamed 'Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.png' -> 'transient_report/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits_preview.png'

Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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= 843.3395
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 690.5475
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 4235.2624
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 1007.0539
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 4226.0715
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 1005.9197
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 5.02201
INFO:                  SECOND_EPOCH__SD_ratio= 0.001
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-03-20.fit
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                -15.0 / [degC] CCD temperature setpoint
CCD-TEMP=                -15.0 / [degC] CCD temperature
FOCTEMP =     12.6800003051758 / [degC] Focuser temperature
AMBTEMP =                 13.6 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits 
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
Header: 74 keys total, 33 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-04-02T04:56:46.4089494' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-04-02T09:56:46.4089494' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61132.4144260185 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-04-02T09:56:56.3109956' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61132.4145406252 / 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      =     359.999713379806 / [deg] RA of telescope" status=0
Record 32: "DEC     =     77.5000510419928 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     26.6036111111111 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     11.6797222222222 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     2.22449249610256 / 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  = 'Cep-02'             / 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= '+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  =                20287 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20287 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     12.6800003051758 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     12.6800003051758 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                  2.2 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 46.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               892.52 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 13.6 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                116.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=            16.601328 / [kph] Wind gust" status=0
Record 61: "WINDSPD =            10.400832 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits 9576 6388  16 bitpix
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
SET-TEMP= -15.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit
CCD-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
CCD-TEMP= -14.900000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/d_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits :)

Spent 0.509642 seconds 
renamed 'mdark_TTUQ2b1x1_-15C_20s_2026-03-21.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/d_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-03-20.fit 9576 6388  16 bitpix
Avarage count on flat field image: 37165.080609
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits :)


No overscan detected - all values seem high! (left_median=23810.0, right_median=27365.5)
renamed 'mff_TTUQ2b1x1_2026-03-20.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                -15.0 / [degC] CCD temperature setpoint
CCD-TEMP=                -14.9 / [degC] CCD temperature
FOCTEMP =     12.5900001525879 / [degC] Focuser temperature
AMBTEMP =                 13.6 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits 
CCD-TEMP= -14.900000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
Header: 74 keys total, 33 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-04-02T04:57:33.9158776' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-04-02T09:57:33.9158776' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61132.4149758681 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-04-02T09:57:43.8187313' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61132.4150904859 / 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=                -14.9 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0'             / Sensor readout mode" status=0
Record 27: "USBLIMIT=                   50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-TTU2'       / Name of telescope" status=0
Record 29: "FOCALLEN=                135.0 / [mm] Focal length" status=0
Record 30: "FOCRATIO=                  2.2 / Focal ratio" status=0
Record 31: "RA      =     359.999713300756 / [deg] RA of telescope" status=0
Record 32: "DEC     =     77.5000510919407 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =              26.6375 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     11.7094444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     2.22189486857747 / 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  = 'Cep-02'             / 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= '+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  =                20287 / [step] Focuser position" status=0
Record 51: "FOCUSPOS=                20287 / [step] Focuser position" status=0
Record 52: "FOCUSSZ =                  0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP =     12.5900001525879 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     12.5900001525879 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                  2.2 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 46.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               892.52 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 13.6 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                116.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=            16.601328 / [kph] Wind gust" status=0
Record 61: "WINDSPD =            10.400832 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits 9576 6388  16 bitpix
SET-TEMP= -15.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
SET-TEMP= -15.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit
CCD-TEMP= -14.900000 for /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
CCD-TEMP= -14.900000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_-15C_20s_2026-03-21.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/d_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits :)

Spent 0.514417 seconds 
renamed 'mdark_TTUQ2b1x1_-15C_20s_2026-03-21.png' -> 'transient_report/dark.png'
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/d_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-03-20.fit 9576 6388  16 bitpix
Avarage count on flat field image: 37165.080609
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits :)


No overscan detected - all values seem high! (left_median=23810.0, right_median=27365.5)
renamed 'mff_TTUQ2b1x1_2026-03-20.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
Dark frame used to calibrate the second-epoch images:



Flat field used to calibrate the second-epoch images:



after the calibration attempt:
SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
Previews of the CALIBRATED second-epoch images:


fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits



fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
  
Last  image: 2461132.91454176 02.04.2026 09:56:46.408 UTC
ERROR running VaST on the field Cep-02-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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.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/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY)...  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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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.
SExtractor catalog cache: restored Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits catalog from cache
SExtractor catalog cache: restored Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits catalog from cache
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 7.6,7.6,6.8,8.3,9.1,9.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 7.6,7.6,6.8,8.3,9.1,9.8 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.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: 2025-12-27T02:12:22.2005788
Setting observation time using DATE-OBS keyword: 2025-12-27T02:12:22.2005788

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2025-12-27T02:12:22.200
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
Exposure 20 sec, 27.12.2025 02:12:22.200 UTC = JD(UTC) 2461036.59203935 mid. exp.
The reference image star  9241.674   128.709 is rejected, see bad_region.lst
The reference image star  9274.293    47.558 is rejected, see bad_region.lst
The reference image star  7873.215    21.951 is rejected, see bad_region.lst
The reference image star  9410.627    20.544 is rejected, see bad_region.lst
The reference image star  9286.895    11.908 is rejected, see bad_region.lst
The reference image star  8461.801    16.449 is rejected, see bad_region.lst
The reference image star  7514.535    11.794 is rejected, see bad_region.lst
The reference image star  8346.034    10.207 is rejected, see bad_region.lst
The reference image star  8101.475     8.776 is rejected, see bad_region.lst
The reference image star  8713.783     6.667 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: 12550, (12548 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: 1683
 * rejected close to frame edge: 56
 * rejected as being too small (<1.7 pix): 0
 * rejected as being too large (>6.7 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): 4
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.

Please note: the CCD position-dependent magnitude correction will be applied.
get_detection_limit_sn(): Detection limit: -7.90
Detection limit from the magnitude-SNR relation= -7.9  (5.0 sigma detection)
The simple faintest star detection limit= -10.0
80 percent brightest stars detection limit= -10.7
Selected detection limit= -10.7
Final detection limit= -10.7 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.7 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): 6
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
    12592 * detected, using  501/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000794, number_of_ambiguous_matches=10 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000715, number_of_ambiguous_matches=9 
11869 * matched, fraction_of_ambiguous_matches= 0.000715, number_of_ambiguous_matches=9 
11869 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000715, number_of_ambiguous_matches=9 
11869 * matched (3rd iteration). Success!
  rotation [degrees] =   0.008
    12592 stars detected, 11869 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 10726, N_manually_selected_comparison_stars = 0
Using 10726 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 10726 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = -0.00000*X_pix +0.00000*Y_pix -0.00082
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 10725 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.90
    13273 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  104976 kB used, 117704 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-02T09:56:46.4089494
Setting observation time using DATE-OBS keyword: 2026-04-02T09:56:46.4089494

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-02T09:56:46.408
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
The star  8219.428    47.001 is rejected, see bad_region.lst
The star  7995.226    16.242 is rejected, see bad_region.lst
The star  9107.805    16.537 is rejected, see bad_region.lst
The star  9060.036     9.563 is rejected, see bad_region.lst
The star  8224.098    11.148 is rejected, see bad_region.lst
The star  8567.714    38.570 is rejected, see bad_region.lst
The star  9396.462    48.292 is rejected, see bad_region.lst
The star  8646.464    58.442 is rejected, see bad_region.lst
The star  7591.165    47.927 is rejected, see bad_region.lst
The star  7772.182    52.650 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 5341
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 629
 * rejected close to frame edge: 30
 * rejected as being too small (<1.9 pix): 0
 * rejected as being too large (>7.6 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 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'.
     5341 * detected, using  212/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 50 < 1068 ! Retrying...
  rotation [degrees] = 170.148
     5341 stars detected,    50 stars matched
ERROR! Too few stars matched (50 < 1068) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-02T09:57:33.9158776
Setting observation time using DATE-OBS keyword: 2026-04-02T09:57:33.9158776

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-02T09:57:33.915
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
The star  8218.225    44.483 is rejected, see bad_region.lst
The star  7994.060    13.689 is rejected, see bad_region.lst
The star  9106.377    13.887 is rejected, see bad_region.lst
The star  9058.943     6.922 is rejected, see bad_region.lst
The star  8222.806     8.532 is rejected, see bad_region.lst
The star  8566.695    36.067 is rejected, see bad_region.lst
The star  9395.358    45.481 is rejected, see bad_region.lst
The star  8645.274    55.840 is rejected, see bad_region.lst
The star  7589.976    45.468 is rejected, see bad_region.lst
The star  8307.505    68.284 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 5360
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 628
 * rejected close to frame edge: 32
 * rejected as being too small (<1.9 pix): 0
 * rejected as being too large (>7.6 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 0
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     5360 * detected, using  213/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 53 < 1072 ! Retrying...
  rotation [degrees] = 170.155
     5360 stars detected,    53 stars matched
ERROR! Too few stars matched (53 < 1072) . Wrong match? Skipping file...
TIMING matching_and_photometry: 0 seconds
Done with measurements! =)

Total number of measurements 25142 (25142 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  2518 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  3709 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  1874 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  1385 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  2383 stars

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

Computing, please wait a bit
.....................................................................................................................
vast_lightcurve_statistics.log: 11762 objects, the longest string is 383 bytes.
Allocating memory for resorting the file.
Variability index idx00_STD  is enabled
Variability index idx01_wSTD is enabled
Variability index idx08_Npts is enabled
Variability index idx09_MAD  is enabled
Variability index idx11_RoMS is enabled
Variability index idx12_rCh2 is enabled
Variability index idx17_Jtim is enabled
Variability index idx18_Ltim is enabled
Variability index idx21_eta  is enabled
Variability index idx23_S_B  is enabled
Variability index idx25_IQR  is enabled
Computing the expected values of variability indexes and their scatter as a function of magnitude
..........
..........
..........
..........
Wriring the list of candidate variables to vast_autocandidates.log ........................................................................................................................



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



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

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

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

Low percentage of matched images - we'll declare this an unsuccessful VaST run (exit code 1)
_____________________
wait
*------ default.sex.telephoto_lens_vSTL ------*
'default.sex.telephoto_lens_vSTL' -> 'default.sex'
Starting VaST with default.sex.telephoto_lens_vSTL

  ./vast --norotation --noflagimage --starmatchraius 4 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
  
Last  image: 2461132.91454176 02.04.2026 09:56:46.408 UTC
ERROR running VaST on the field Cep-02-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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.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/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY)...  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/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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.
SExtractor catalog cache: restored Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits catalog from cache
SExtractor catalog cache: restored Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits catalog from cache
The number of processor cores determined from /proc/cpuinfo is 24.
Running SExtractor in 4 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-59_20.00sec_-15.00C_LIGHT_0068.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2Parent process says: we are done fork()ing.
b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
The above guess is baWaiting for thread 3 to finish...
sed 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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.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_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits > image00004.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 image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits > image00003.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 image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
Waiting for thread 2 to finish...
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits


Done with SExtractor!

TIMING SExtractor: 9 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-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.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: 2025-12-27T02:12:22.2005788
Setting observation time using DATE-OBS keyword: 2025-12-27T02:12:22.2005788

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2025-12-27T02:12:22.200
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cep-02-Q2b1x1_2025-12-26_20-12-22_20.00sec_-15.00C_LIGHT_0067.fits
Exposure 20 sec, 27.12.2025 02:12:22.200 UTC = JD(UTC) 2461036.59203935 mid. exp.
The reference image star  9284.544     7.430 is rejected, see bad_region.lst
The reference image star  9286.792    12.354 is rejected, see bad_region.lst
The reference image star  9259.546    82.811 is rejected, see bad_region.lst
The reference image star  9221.852   166.238 is rejected, see bad_region.lst
The reference image star  8521.948    34.723 is rejected, see bad_region.lst
The reference image star  7873.215    21.951 is rejected, see bad_region.lst
The reference image star  7555.231    26.214 is rejected, see bad_region.lst
The reference image star  9410.626    20.543 is rejected, see bad_region.lst
The reference image star  8461.792    16.453 is rejected, see bad_region.lst
The reference image star  7521.277    17.148 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: 88970, (88968 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 31
 * rejected inside rectangles defined in bad_region.lst: 9646
 * rejected close to frame edge: 409
 * 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): 184
 * 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: -7.56
Detection limit from the magnitude-SNR relation= -7.6  (5.0 sigma detection)
The simple faintest star detection limit= -6.9
80 percent brightest stars detection limit= -8.0
Selected detection limit= -8.0
Final detection limit= -8.0 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.05.0 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 186
 * 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'.
    87871 * detected, using  493/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.005328, number_of_ambiguous_matches=474 
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.005316, number_of_ambiguous_matches=473 
80478 * matched, fraction_of_ambiguous_matches= 0.005316, number_of_ambiguous_matches=473 
80478 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.005316, number_of_ambiguous_matches=473 
80478 * matched (3rd iteration). Success!
  rotation [degrees] =   0.008
    87871 stars detected, 80478 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 71492, N_manually_selected_comparison_stars = 0
Using 71492 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 71490 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00000*X_pix +0.00000*Y_pix -0.00451
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 68003 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.56
    96363 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  159236 kB used, 182728 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-02T09:56:46.4089494
Setting observation time using DATE-OBS keyword: 2026-04-02T09:56:46.4089494

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-02T09:56:46.408
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-56-46_20.00sec_-15.00C_LIGHT_0073.fits
The star  8646.467    58.441 is rejected, see bad_region.lst
The star  7533.673    60.792 is rejected, see bad_region.lst
The star  8219.428    47.001 is rejected, see bad_region.lst
The star  7995.226    16.240 is rejected, see bad_region.lst
The star  9107.821    16.551 is rejected, see bad_region.lst
The star  7613.023    15.214 is rejected, see bad_region.lst
The star  9060.027     9.570 is rejected, see bad_region.lst
The star  8224.037    11.134 is rejected, see bad_region.lst
The star  8825.069    11.564 is rejected, see bad_region.lst
The star  8828.383    12.045 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 31112
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 2
 * rejected inside rectangles defined in bad_region.lst: 2708
 * rejected close to frame edge: 131
 * 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): 189
 * 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'.
    31112 * detected, using  174/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000125, number_of_ambiguous_matches=12 
Too few * matched: 1223 < 6222 ! Retrying...
  rotation [degrees] =   3.140
    31112 stars detected,  1223 stars matched
ERROR! Too few stars matched (1223 < 6222) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-04-02T09:57:33.9158776
Setting observation time using DATE-OBS keyword: 2026-04-02T09:57:33.9158776

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-04-02T09:57:33.915
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-04-02_CI_Cep-02-Q2b1x1_045815_TTUQ2b1x1_20915_WaY4TawY/fd_Cep-02-Q2b1x1_2026-04-02_04-57-33_20.00sec_-14.90C_LIGHT_0074.fits
The star  8218.225    44.483 is rejected, see bad_region.lst
The star  9316.159    20.144 is rejected, see bad_region.lst
The star  7994.059    13.689 is rejected, see bad_region.lst
The star  9106.405    13.932 is rejected, see bad_region.lst
The star  7611.973    12.666 is rejected, see bad_region.lst
The star  9058.939     6.926 is rejected, see bad_region.lst
The star  8222.758     8.524 is rejected, see bad_region.lst
The star  8827.339     9.793 is rejected, see bad_region.lst
The star  8823.453     8.846 is rejected, see bad_region.lst
The star  8502.476     8.803 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 31450
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 1
 * rejected inside rectangles defined in bad_region.lst: 2707
 * rejected close to frame edge: 131
 * 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): 180
 * 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'.
    31450 * detected, using  176/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000042, number_of_ambiguous_matches=4 
Too few * matched: 134 < 6290 ! Retrying...
  rotation [degrees] =   8.679
    31450 stars detected,   134 stars matched
ERROR! Too few stars matched (134 < 6290) . Wrong match? Skipping file...
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 176841 (176841 measurements stored in RAM)
Freeing up some memory...  Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 1 seconds
The lightcurve files have been written, freeing up more memory...
Creating vast_image_details.log ... 

Writing summary file: vast_summary.log ...  OK
Selecting the best aperture for each source
Aperture with index 0 (REFERENCE_APERTURE_DIAMETER +0.00*REFERENCE_APERTURE_DIAMETER) seems best for 15234 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 23473 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 12732 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 10093 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 18946 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: 80094 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
..........
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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-02-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO  ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is V36
############################################################
ls: cannot access 'planets.txt': No such file or directory
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT):
ls: cannot access 'moons.txt': No such file or directory
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT):
ls: cannot access 'spacecraft.txt': No such file or directory
############################################################
ls: cannot access 'comets.txt': No such file or directory
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
ls: cannot access 'asassn_transients_list.txt': No such file or directory
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
ls: cannot access 'tocp_transients_list.txt': No such file or directory
NMW transient search results

Processing complete!

Processing log:

Filtering log:

Profiling:
