######## 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_OR_FILE= /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_DIR_OR_FILE= /var/www/nmw_calibration/TTUQ2b1x1/flats
FRAME_EDGE_OFFSET_PIX= 600
GAIA_BAND_FOR_CATALOGED_SOURCE_CHECK=
MAX_NEW_TO_REF_MEAN_IMG_VALUE_RATIO= 100
MAX_NEW_IMG_MEAN_VALUE= 25000
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS= 0.18
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS_SOFT_LIMIT= 0.12
MPC_CODE= V36
NMW_CALIBRATION= /var/www/nmw_calibration
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_HARD_LIMIT= 8000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 4000
OMP_NUM_THREADS=
ONLINE_MPCHECKER_BUTTON_ASTEROID_SEARCH_RADIUS_ARCMIN=
PHOTOMETRIC_CALIBRATION=
REQUIRE_PIX_SHIFT_BETWEEN_IMAGES_FOR_TRANSIENT_CANDIDATES= yes
SEXTRACTOR_CONFIG_BRIGHTSTARPASS= default.sex.telephoto_lens_onlybrightstars_v1
SEXTRACTOR_CONFIG_FILES= default.sex.telephoto_lens_onlybrightstars_v1 default.sex.telephoto_lens_vSTL
STARMATCH_RADIUS_PIX= 4
SYSREM_ITERATIONS= 0
TELESCOP=
TELESCOP_NAME_KNOWN_TO_VaST_FOR_FOV_DETERMINATION=
UCAC5_PLATESOLVE_ITERATIONS= 2
FPACK_FULLY_CALIBRATED_IMAGE= no
#######################################
HOSTNAME= tau
USER=
HOME=
#######################################
SExtractor catalog cache: enabled, directory /data_ssd/NMW-TexasTech/vast_sextractor_cache
Reference image directory is set to /data_ssd/NMW-TexasTech/reference_imgs
VIZIER_SITE=vizier.cds.unistra.fr
GAIA_DR2_CLIENT=vizquery (lib/vizquery -> VizieR vizier.cds.unistra.fr)
INFO: MAKE_PNG_PLOTS is set to yes
FITS_FILE_EXT=fits
CALIBRATION_STATUS_PREFIX=
Fields in the data directory:
Cyg-06-Q2b1x1
#######################################
########### Starting Cyg-06-Q2b1x1 ###########
Processing Cyg-06-Q2b1x1
server tau has sufficient free disk space available: 280515 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 280515 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits
Small preview (one of the new images): 
Large previews of the second-epoch (new) images:
MAKE_PNG_PLOTS=yes
renamed 'Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.png' -> 'transient_report/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits_preview.png'
Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits

renamed 'Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.png' -> 'transient_report/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits_preview.png'
Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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= 490.6931
INFO: REFERENCE_EPOCH__FIRST_IMAGE_SD= 859.2204
INFO: SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 1764.8648
INFO: SECOND_EPOCH__FIRST_IMAGE_SD= 359.1425
INFO: SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 1758.6897
INFO: SECOND_EPOCH__SECOND_IMAGE_SD= 364.6089
----------------------------------------------
INFO: ref_to_second_epoch_img_mean_ratio= 3.59668
INFO: SECOND_EPOCH__SD_ratio= 0.015
----------------------------------------------
Calibration settings: DARK_FRAMES_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/darks FLAT_FIELD_DIR_OR_FILE=/var/www/nmw_calibration/TTUQ2b1x1/flats
EXPTIME = 20.0 / [s] Exposure duration
SET-TEMP= 5.0 / [degC] CCD temperature setpoint
CCD-TEMP= 5.0 / [degC] CCD temperature
FOCTEMP = 27.9099998474121 / [degC] Focuser temperature
AMBTEMP = 27.8 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
CCD-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
SET-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.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= '2026-06-07T23:27:34.2773018' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-06-08T04:27:34.2773018' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS = 61199.1858133911 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-06-08T04:27:44.1780696' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG = 61199.1859279862 / Modified Julian Date of averaged midpoint" status=0
Record 16: "XBINNING= 1 / X axis binning factor" status=0
Record 17: "YBINNING= 1 / Y axis binning factor" status=0
Record 18: "GAIN = 30 / Sensor gain" status=0
Record 19: "OFFSET = 30 / Sensor gain offset" status=0
Record 20: "XPIXSZ = 3.76 / [um] Pixel X axis size" status=0
Record 21: "YPIXSZ = 3.76 / [um] Pixel Y axis size" status=0
Record 22: "INSTRUME= 'QHY600M' / Imaging instrument name" status=0
Record 23: "CAMERAID= 'QHY600M-84137c4dbbbd119a9' / Imaging instrument identifier" status=0
Record 24: "SET-TEMP= 5.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP= 5.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0' / Sensor readout mode" status=0
Record 27: "USBLIMIT= 50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-TTU2' / Name of telescope" status=0
Record 29: "FOCALLEN= 135.0 / [mm] Focal length" status=0
Record 30: "FOCRATIO= 2.2 / Focal ratio" status=0
Record 31: "RA = 310.90622845104 / [deg] RA of telescope" status=0
Record 32: "DEC = 37.9996241240952 / [deg] Declination of telescope" status=0
Record 33: "CENTALT = 20.345 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ = 57.0727777777778 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS = 2.85578696141067 / 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 = 'Cyg-06' / Name of the object of interest" status=0
Record 46: "OBJCTRA = '20 43 38' / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+38 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 = 20423 / [step] Focuser position" status=0
Record 51: "FOCUSPOS= 20423 / [step] Focuser position" status=0
Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP = 27.9099998474121 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM= 27.9099998474121 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT= 16.1 / [degC] Dew point" status=0
Record 56: "HUMIDITY= 49.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE= 893.6 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP = 27.8 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR = 83.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST= 23.801904 / [kph] Wind gust" status=0
Record 61: "WINDSPD = 15.50124 / [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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits 9576 6388 16 bitpix
SET-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
SET-TEMP= 5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit
CCD-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
CCD-TEMP= 4.800000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit 9576 6388 16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/d_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits :)
Spent 0.752038 seconds
renamed 'mdark_TTUQ2b1x1_5C_20s_2026-05-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-05-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/d_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits 9576 6388 16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-05-30.fit 9576 6388 16 bitpix
Avarage count on flat field image: 20659.746399
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits :)
No overscan detected - all values seem high! (left_median=14784.5, right_median=14894.5)
renamed 'mff_TTUQ2b1x1_2026-05-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
EXPTIME = 20.0 / [s] Exposure duration
SET-TEMP= 5.0 / [degC] CCD temperature setpoint
CCD-TEMP= 5.0 / [degC] CCD temperature
FOCTEMP = 27.9599990844727 / [degC] Focuser temperature
AMBTEMP = 27.8 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
CCD-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
SET-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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= '2026-06-07T23:28:15.3005856' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-06-08T04:28:15.3005856' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS = 61199.1862881943 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-06-08T04:28:25.2010194' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG = 61199.1864027893 / Modified Julian Date of averaged midpoint" status=0
Record 16: "XBINNING= 1 / X axis binning factor" status=0
Record 17: "YBINNING= 1 / Y axis binning factor" status=0
Record 18: "GAIN = 30 / Sensor gain" status=0
Record 19: "OFFSET = 30 / Sensor gain offset" status=0
Record 20: "XPIXSZ = 3.76 / [um] Pixel X axis size" status=0
Record 21: "YPIXSZ = 3.76 / [um] Pixel Y axis size" status=0
Record 22: "INSTRUME= 'QHY600M' / Imaging instrument name" status=0
Record 23: "CAMERAID= 'QHY600M-84137c4dbbbd119a9' / Imaging instrument identifier" status=0
Record 24: "SET-TEMP= 5.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP= 5.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0' / Sensor readout mode" status=0
Record 27: "USBLIMIT= 50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-TTU2' / Name of telescope" status=0
Record 29: "FOCALLEN= 135.0 / [mm] Focal length" status=0
Record 30: "FOCRATIO= 2.2 / Focal ratio" status=0
Record 31: "RA = 310.906228399977 / [deg] RA of telescope" status=0
Record 32: "DEC = 37.9996240934273 / [deg] Declination of telescope" status=0
Record 33: "CENTALT = 20.4675 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ = 57.1408333333333 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS = 2.83969312118329 / 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 = 'Cyg-06' / Name of the object of interest" status=0
Record 46: "OBJCTRA = '20 43 38' / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+38 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 = 20423 / [step] Focuser position" status=0
Record 51: "FOCUSPOS= 20423 / [step] Focuser position" status=0
Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP = 27.9599990844727 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM= 27.9599990844727 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT= 16.1 / [degC] Dew point" status=0
Record 56: "HUMIDITY= 49.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE= 893.6 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP = 27.8 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR = 83.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST= 23.801904 / [kph] Wind gust" status=0
Record 61: "WINDSPD = 15.50124 / [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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits 9576 6388 16 bitpix
SET-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
SET-TEMP= 5.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit
CCD-TEMP= 5.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
CCD-TEMP= 4.800000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_5C_20s_2026-05-30.fit 9576 6388 16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/d_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits :)
Spent 0.846571 seconds
renamed 'mdark_TTUQ2b1x1_5C_20s_2026-05-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-05-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/d_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits 9576 6388 16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-05-30.fit 9576 6388 16 bitpix
Avarage count on flat field image: 20659.746399
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits :)
No overscan detected - all values seem high! (left_median=14784.5, right_median=14894.5)
renamed 'mff_TTUQ2b1x1_2026-05-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Previews of the CALIBRATED second-epoch images:
fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits

fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Last image: 2461199.68592913 08.06.2026 04:27:34.277 UTC
ERROR running VaST on the field Cyg-06-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____
--==VaST 1.0rc90==--
Parsing command line arguments...
opt 'r': assuming no rotation larger than 15.0 degrees!
opt 'F': Will NOT create flag images for SExtractor
opt '5': 4.000000 pix is the new fixed star matching radius!
opt 'b': Using 500 reference stars for image matching!
opt '3': Will try to select best aperture for each source!
opt 'y': 0 SysRem iterations will be conducted!
opt 't 4': robust linear magnitude calibration (vary zero-point and slope)
opt 'x': 99 is the maximum acceptable SExtractor flag!
WARNING: disabling the mag-size filter in order not to reject blended stars.
opt 'u': Stick with UTC time system, no conversion to TT will be done!
opt 'f': Run ./find_candidates manually!
opt 'k': "JD" keyword in FITS image header will be ignored!
INFO from vast_remove_directory(): Could not open directory: symlinks_to_images
INFO from vast_remove_directory(): Could not open directory: converted_images
INFO from vast_remove_directory(): Could not open directory: unpacked_images
Checking the list of input images specified on the command line ...
Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9)... 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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Preparing to process 4 input FITS images...
######## Forcing special settings for the transient detection ########
transient search mode: disabling the mag-size filter as it should be switched off when running a transient search!
transient search mode: disabling the bad image filter as it will not help during the transient search!
transient search mode: will not try to gues image saturation limit
transient search mode: no UTC-to-TT time system conversion will be performed!!!
transient search mode: setting the maximum acceptable SExtractor flag to 3
transient search mode: disabling rejectin of images with elliptical stars
transient search mode: not discarding large sources
################
Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 24 image regions (defined in bad_region.lst).
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits catalog from cache
SExtractor catalog cache: restored Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
The above guess is based on the non-default gain value specified in default.sex by user
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2Excluding more image regions!.. (will not print them all)
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
The above guess is baExcluded a total of 24 image regions (defined in bad_region.lst).
17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits
sed on the non-default gain value specified in default.sex by user
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 24 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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.9,7.5,8.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex -PARAMETERS_NAME default.param -PHOT_APERTURES 6.2,6.2,5.6,6.9,7.5,8.1 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-17T10:20:10.5213533
Setting observation time using DATE-OBS keyword: 2026-05-17T10:20:10.5213533
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-17T10:20:10.521
EXPTIME = 20.000
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
Exposure 20 sec, 17.05.2026 10:20:10.521 UTC = JD(UTC) 2461177.93079307 mid. exp.
The reference image star 7925.732 32.208 is rejected, see bad_region.lst
The reference image star 9471.329 15.967 is rejected, see bad_region.lst
The reference image star 8382.360 17.091 is rejected, see bad_region.lst
The reference image star 9293.153 15.079 is rejected, see bad_region.lst
The reference image star 7821.466 12.117 is rejected, see bad_region.lst
The reference image star 9242.083 9.146 is rejected, see bad_region.lst
The reference image star 8514.781 8.915 is rejected, see bad_region.lst
The reference image star 9404.431 6.852 is rejected, see bad_region.lst
The reference image star 8137.094 5.287 is rejected, see bad_region.lst
The reference image star 9341.793 1.869 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: 29334, (29333 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: 8836
* rejected close to frame edge: 157
* rejected as being too small (<1.6 pix): 0
* rejected as being too large (>6.3 pix): 0
* rejected as outliers in mag-size plot: 0
* rejected as having SExtractor flags > 99 and <= 7: 0
* rejected as having hopelessly bad SExtractor flags (>7): 43
* 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: -7.63
Detection limit from the magnitude-SNR relation= -7.6 (5.0 sigma detection)
The simple faintest star detection limit= -9.5
80 percent brightest stars detection limit= -10.5
Selected detection limit= -10.5
Final detection limit= -10.5 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)
Parameter box for transient search: 10.06.4 pix): 0
* rejected as outliers in mag-size plot: 0
* rejected as having SExtractor flags > 99 and <= 7: 0
* rejected as having hopelessly bad SExtractor flags (>7): 69
* 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'.
29671 * detected, using 505/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.002123, number_of_ambiguous_matches=63
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.002157, number_of_ambiguous_matches=64
27569 * matched, fraction_of_ambiguous_matches= 0.002157, number_of_ambiguous_matches=64
27569 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.002157, number_of_ambiguous_matches=64
27569 * matched (3rd iteration). Success!
rotation [degrees] = -0.001
29671 stars detected, 27569 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 23899, N_manually_selected_comparison_stars = 0
Using 23899 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 23899 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = 0.00000*X_pix -0.00000*Y_pix -0.00076
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 23898 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.65
31436 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory: 122664 kB used, 133632 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)
Processing /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.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: 2026-06-08T04:27:34.2773018
Setting observation time using DATE-OBS keyword: 2026-06-08T04:27:34.2773018
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-06-08T04:27:34.277
EXPTIME = 20.000
Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
The star 9563.814 36.854 is rejected, see bad_region.lst
The star 8220.790 27.024 is rejected, see bad_region.lst
The star 7970.474 50.096 is rejected, see bad_region.lst
The star 8255.714 53.110 is rejected, see bad_region.lst
The star 8259.441 62.340 is rejected, see bad_region.lst
The star 8225.904 67.852 is rejected, see bad_region.lst
The star 7889.908 64.334 is rejected, see bad_region.lst
The star 8905.364 67.030 is rejected, see bad_region.lst
The star 7851.924 71.041 is rejected, see bad_region.lst
The star 8544.057 76.944 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
* passed selection: 1577
* rejected as having no flux measurement: 0
* rejected as having SNR<3.0: 0
* rejected inside rectangles defined in bad_region.lst: 941
* rejected close to frame edge: 16
* 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): 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'.
1577 * detected, using 100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1555 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1555 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1555 * matched (3rd iteration). Success!
rotation [degrees] = 1.030
1577 stars detected, 1555 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 960, N_manually_selected_comparison_stars = 0
Using 960 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 929 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = 0.00020*X_pix +0.00001*Y_pix -0.22621
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 929 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -8.00
[01;31m ERROR!!! Magnitude calibration failure. Dropping image. [33;00m
31436 objects stored in memory (400000 max.)
memory: 122812 kB used, 133632 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)
Processing /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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: 2026-06-08T04:28:15.3005856
Setting observation time using DATE-OBS keyword: 2026-06-08T04:28:15.3005856
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-06-08T04:28:15.300
EXPTIME = 20.000
Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
The star 8225.416 27.386 is rejected, see bad_region.lst
The star 9568.657 37.300 is rejected, see bad_region.lst
The star 7975.025 50.373 is rejected, see bad_region.lst
The star 8260.397 53.370 is rejected, see bad_region.lst
The star 8230.513 68.214 is rejected, see bad_region.lst
The star 8264.087 62.725 is rejected, see bad_region.lst
The star 7894.394 64.603 is rejected, see bad_region.lst
The star 7856.503 71.236 is rejected, see bad_region.lst
The star 8548.739 77.376 is rejected, see bad_region.lst
The star 8005.139 74.055 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
* passed selection: 1826
* rejected as having no flux measurement: 0
* rejected as having SNR<3.0: 0
* rejected inside rectangles defined in bad_region.lst: 807
* rejected close to frame edge: 23
* 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): 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'.
1826 * detected, using 100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1796 * matched, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1796 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0
1796 * matched (3rd iteration). Success!
rotation [degrees] = 1.018
1826 stars detected, 1796 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 929, N_manually_selected_comparison_stars = 0
Using 929 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 889 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = 0.00029*X_pix -0.00003*Y_pix -0.19319
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 889 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.99
[01;31m ERROR!!! Magnitude calibration failure. Dropping image. [33;00m
31436 objects stored in memory (400000 max.)
memory: 126004 kB used, 133632 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)
Total number of measurements 59005 (59005 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 8129 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 7957 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 3770 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 2919 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 4794 stars
done! =)
TIMING select_aperture: 2 seconds
Computing lightcurve statistics... Will not compute variability indexes for objects having <1 points in lightcurve
You may disable this by commenting out the line '#define DROP_LIGHTCURVES_WITH_SMALL_NUMBER_OF_POINTS_FROM_ALL_PLOTS' in src/vast_limits.h an re-compiling VaST with 'make'
Computing, please wait a bit
.................................................................................................................................................................................................................................................................................
vast_lightcurve_statistics.log: 27301 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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Last image: 2461199.68592913 08.06.2026 04:27:34.277 UTC
ERROR running VaST on the field Cyg-06-Q2b1x1 (wrong field? clouds? very bad focus? -- transient_factory_test31.txt)
____ VaST output ____
--==VaST 1.0rc90==--
Parsing command line arguments...
opt 'r': assuming no rotation larger than 15.0 degrees!
opt 'F': Will NOT create flag images for SExtractor
opt '5': 4.000000 pix is the new fixed star matching radius!
opt 'b': Using 500 reference stars for image matching!
opt '3': Will try to select best aperture for each source!
opt 'y': 0 SysRem iterations will be conducted!
opt 't 4': robust linear magnitude calibration (vary zero-point and slope)
opt 'x': 99 is the maximum acceptable SExtractor flag!
WARNING: disabling the mag-size filter in order not to reject blended stars.
opt 'u': Stick with UTC time system, no conversion to TT will be done!
opt 'f': Run ./find_candidates manually!
opt 'k': "JD" keyword in FITS image header will be ignored!
INFO from vast_remove_directory(): Could not open directory: symlinks_to_images
INFO from vast_remove_directory(): Could not open directory: converted_images
INFO from vast_remove_directory(): Could not open directory: unpacked_images
Checking the list of input images specified on the command line ...
Looking for the list of input images with time corrections in vast_list_of_input_images_with_time_corrections.txt ... list not found.
This is OK if you specify the input images on the command line, not through this text file.
Checking write permissions for the current directory (/data_ssd/NMW-TexasTech/workdir/vast_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9)... 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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Preparing to process 4 input FITS images...
######## Forcing special settings for the transient detection ########
transient search mode: disabling the mag-size filter as it should be switched off when running a transient search!
transient search mode: disabling the bad image filter as it will not help during the transient search!
transient search mode: will not try to gues image saturation limit
transient search mode: no UTC-to-TT time system conversion will be performed!!!
transient search mode: setting the maximum acceptable SExtractor flag to 3
transient search mode: disabling rejectin of images with elliptical stars
transient search mode: not discarding large sources
################
Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 24 image regions (defined in bad_region.lst).
Setting the fixed star match radius of 4.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits catalog from cache
SExtractor catalog cache: restored Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-36_20.00sec_-0.00C_LIGHT_1305.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
The above guess is based on the non-default gain value specified in default.sex by user
Parent process says: we are done fork()ing.
Waiting for thread 3 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
The above guess is based on the non-default gain value specified in default.sex by user
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 24 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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
Excluding image region: -1.0 -1.0 1.0 1.0 (defined in bad_region.lst)
Excluding image region: 7500.0 0.0 9576.0 6388.0 (defined in bad_region.lst)
Excluding image region: 1122.0 1550.0 1124.0 1552.0 (defined in bad_region.lst)
Excluding image region: 1637.0 2824.0 1639.0 2826.0 (defined in bad_region.lst)
Excluding image region: 1831.0 2839.0 1833.0 2841.0 (defined in bad_region.lst)
Excluding image region: 1905.0 4570.0 1907.0 4572.0 (defined in bad_region.lst)
Excluding image region: 2012.0 4693.0 2014.0 4695.0 (defined in bad_region.lst)
Excluding image region: 2397.0 4241.0 2399.0 4243.0 (defined in bad_region.lst)
Excluding image region: 3279.0 5428.0 3281.0 5430.0 (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 24 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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex -PARAMETERS_NAME default.param -PHOT_APERTURES 4.5,4.5,4.1,5.0,5.4,5.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex -PARAMETERS_NAME default.param -PHOT_APERTURES 4.6,4.6,4.1,5.0,5.5,5.9 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.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_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-05-17T10:20:10.5213533
Setting observation time using DATE-OBS keyword: 2026-05-17T10:20:10.5213533
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-05-17T10:20:10.521
EXPTIME = 20.000
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Cyg-06-Q2b1x1_2026-05-17_05-20-10_20.00sec_-0.00C_LIGHT_1304.fits
Exposure 20 sec, 17.05.2026 10:20:10.521 UTC = JD(UTC) 2461177.93079307 mid. exp.
The reference image star 8689.632 3.464 is rejected, see bad_region.lst
The reference image star 8557.492 3.049 is rejected, see bad_region.lst
The reference image star 8281.762 2.602 is rejected, see bad_region.lst
The reference image star 7938.201 3.259 is rejected, see bad_region.lst
The reference image star 7794.855 4.844 is rejected, see bad_region.lst
The reference image star 8742.521 4.311 is rejected, see bad_region.lst
The reference image star 8779.063 5.554 is rejected, see bad_region.lst
The reference image star 8744.815 3.588 is rejected, see bad_region.lst
The reference image star 7703.085 6.419 is rejected, see bad_region.lst
The reference image star 7739.792 7.087 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: 188636, (188634 good for image matching)
* rejected as having no flux measurement: 0
* rejected as having SNR<3.0: 62
* rejected inside rectangles defined in bad_region.lst: 40296
* rejected close to frame edge: 833
* rejected as being too small (<1.2 pix): 0
* rejected as being too large (>4.9 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): 11
* 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: -7.35
Detection limit from the magnitude-SNR relation= -7.4 (5.0 sigma detection)
The simple faintest star detection limit= -6.5
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: 10.05.0 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): 15
* 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'.
185851 * detected, using 492/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.011175, number_of_ambiguous_matches=2108
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.011154, number_of_ambiguous_matches=2104
171251 * matched, fraction_of_ambiguous_matches= 0.011154, number_of_ambiguous_matches=2104
171251 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.011154, number_of_ambiguous_matches=2104
171251 * matched (3rd iteration). Success!
rotation [degrees] = -0.001
185851 stars detected, 171251 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 133575, N_manually_selected_comparison_stars = 0
Using 133575 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 133574 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = -0.00000*X_pix -0.00000*Y_pix -0.00012
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 127463 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.38
203236 objects stored in memory (400000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory: 245888 kB used, 272820 kB peak, 65263848 kB available RAM
Total number of measurements 374487 (374487 measurements stored in RAM)
sorting the measurements cached in memory,
writing lightcurve (outNNNNN.dat) files...
processed 2 of 4 images ( 50.0%)
Processing /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.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: 2026-06-08T04:27:34.2773018
Setting observation time using DATE-OBS keyword: 2026-06-08T04:27:34.2773018
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-06-08T04:27:34.277
EXPTIME = 20.000
Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-27-34_20.00sec_5.00C_LIGHT_0114.fits
The star 9563.807 36.856 is rejected, see bad_region.lst
The star 8999.876 10.375 is rejected, see bad_region.lst
The star 8702.860 9.587 is rejected, see bad_region.lst
The star 8355.953 8.937 is rejected, see bad_region.lst
The star 8839.863 5.970 is rejected, see bad_region.lst
The star 8837.543 6.455 is rejected, see bad_region.lst
The star 8290.822 4.537 is rejected, see bad_region.lst
The star 8860.888 20.587 is rejected, see bad_region.lst
The star 7845.112 20.771 is rejected, see bad_region.lst
The star 8220.786 27.024 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
* passed selection: 15604
* rejected as having no flux measurement: 0
* rejected as having SNR<3.0: 1
* rejected inside rectangles defined in bad_region.lst: 5317
* rejected close to frame edge: 126
* rejected as being too small (<1.1 pix): 0
* rejected as being too large (>4.5 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): 44
* 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'.
15604 * detected, using 100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000084, number_of_ambiguous_matches=17
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000079, number_of_ambiguous_matches=16
15266 * matched, fraction_of_ambiguous_matches= 0.000079, number_of_ambiguous_matches=16
15266 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000079, number_of_ambiguous_matches=16
15266 * matched (3rd iteration). Success!
rotation [degrees] = 1.024
15604 stars detected, 15266 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 9210, N_manually_selected_comparison_stars = 0
Using 9210 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 7637 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = 0.00025*X_pix +0.00001*Y_pix -0.29398
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 7637 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.70
[01;31m ERROR!!! Magnitude calibration failure. Dropping image. [33;00m
203236 objects stored in memory (400000 max.)
memory: 1905348 kB used, 2007260 kB peak, 65263848 kB available RAM
processed 3 of 4 images ( 75.0%)
Processing /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.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: 2026-06-08T04:28:15.3005856
Setting observation time using DATE-OBS keyword: 2026-06-08T04:28:15.3005856
Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-06-08T04:28:15.300
EXPTIME = 20.000
Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-06-08_CI_Cyg-06-Q2b1x1_000333_TTUQ2b1x1_3111788_Vv1NrhO9/fd_Cyg-06-Q2b1x1_2026-06-07_23-28-15_20.00sec_5.00C_LIGHT_0115.fits
The star 9004.624 10.892 is rejected, see bad_region.lst
The star 7502.051 10.991 is rejected, see bad_region.lst
The star 8707.334 9.848 is rejected, see bad_region.lst
The star 8360.101 9.500 is rejected, see bad_region.lst
The star 8843.916 6.634 is rejected, see bad_region.lst
The star 7959.889 7.137 is rejected, see bad_region.lst
The star 8295.768 4.984 is rejected, see bad_region.lst
The star 7850.032 21.023 is rejected, see bad_region.lst
The star 8225.406 27.385 is rejected, see bad_region.lst
The star 9568.657 37.299 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
* passed selection: 17406
* rejected as having no flux measurement: 0
* rejected as having SNR<3.0: 3
* rejected inside rectangles defined in bad_region.lst: 4518
* rejected close to frame edge: 160
* rejected as being too small (<1.1 pix): 0
* rejected as being too large (>4.6 pix): 0
* rejected as outliers in mag-size plot: 0
* rejected as having SExtractor flags > 99 and <= 7: 0
* rejected as having hopelessly bad SExtractor flags (>7): 51
* 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'.
17406 * detected, using 100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000089, number_of_ambiguous_matches=18
refining the coordinate transformation... fraction_of_ambiguous_matches= 0.000089, number_of_ambiguous_matches=18
17057 * matched, fraction_of_ambiguous_matches= 0.000089, number_of_ambiguous_matches=18
17057 * matched (2nd iteration). fraction_of_ambiguous_matches= 0.000089, number_of_ambiguous_matches=18
17057 * matched (3rd iteration). Success!
rotation [degrees] = 1.016
17406 stars detected, 17057 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 10564, N_manually_selected_comparison_stars = 0
Using 10564 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 8953 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
delta_m = 0.00032*X_pix -0.00003*Y_pix -0.26993
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
ERROR in magnitude calibration: fabs(lin_mag_A * X_im_size + lin_mag_B * Y_im_size + lin_mag_C) > MAX_LIN_CORR_MAG
Used 8953 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.71
[01;31m ERROR!!! Magnitude calibration failure. Dropping image. [33;00m
203236 objects stored in memory (400000 max.)
memory: 1905876 kB used, 2007260 kB peak, 65263848 kB available RAM
processed 4 of 4 images (100.0%)
TIMING matching_and_photometry: 7 seconds
Done with measurements! =)
Total number of measurements 374487 (0 measurements stored in RAM)
Freeing up some memory... Sorting the measurements cached in memory...
Writing lightcurve (outNNNNN.dat) files...
TIMING lightcurve_write: 0 seconds
The lightcurve files have been written, freeing up more memory...
Creating vast_image_details.log ...
Writing summary file: vast_summary.log ... OK
Selecting the best aperture for each source
Aperture with index 0 (REFERENCE_APERTURE_DIAMETER +0.00*REFERENCE_APERTURE_DIAMETER) seems best for 30746 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 46524 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 29835 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 24388 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 39758 stars
done! =)
TIMING select_aperture: 8 seconds
Computing lightcurve statistics... Will not compute variability indexes for objects having <1 points in lightcurve
You may disable this by commenting out the line '#define DROP_LIGHTCURVES_WITH_SMALL_NUMBER_OF_POINTS_FROM_ALL_PLOTS' in src/vast_limits.h an re-compiling VaST with 'make'
Computing, please wait a bit
.......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
vast_lightcurve_statistics.log: 170392 objects, the longest string is 384 bytes.
Allocating memory for resorting the file.
Variability index idx00_STD is enabled
Variability index idx01_wSTD is enabled
Variability index idx08_Npts is enabled
Variability index idx09_MAD is enabled
Variability index idx11_RoMS is enabled
Variability index idx12_rCh2 is enabled
Variability index idx17_Jtim is enabled
Variability index idx18_Ltim is enabled
Variability index idx21_eta is enabled
Variability index idx23_S_B is enabled
Variability index idx25_IQR is enabled
Computing the expected values of variability indexes and their scatter as a function of magnitude
..........
..........
..........
..........
Wriring the list of candidate variables to vast_autocandidates.log ..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
----***** VaST processing WARNING *****----
You asked VaST to process 4 images, but only 1 were actually matched to the reference one.
Please investigate this!
**************************************************************
This error might be a bug, but it is far more likely that it is caused by
inappropriate input data. A few simple things to check in the diagnostic
messages printed above (or the vast*.log files):
* How many of the input images are matched?
* Does the number of detected stars on each image look reasonable?
* Do images have a sufficient overlap of at least about 20 percent?
You may run
./sextract_single_image /path/to/my/image/file.fit
to see how well VaST detects stars with the current SExtractor settings
(star detection settings can be changed in the default.sex configuration
file, see various examples in the VaST directory).
If you cannot identify the problem, please e-mail Kirill Sokolovsky
Please try to describe the problem in details and, if possible, attach vast_summary.log
file and a few example images. If the images are too big to be sent by e-mail, please
upload them through a web-form http://scan.sai.msu.ru/upload/
**************************************************************
Low percentage of matched images - we'll declare this an unsuccessful VaST run (exit code 1)
_____________________
########### Completed Cyg-06-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is V36
############################################################
ls: cannot access 'planets.txt': No such file or directory
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT):
ls: cannot access 'moons.txt': No such file or directory
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT):
ls: cannot access 'spacecraft.txt': No such file or directory
############################################################
ls: cannot access 'comets.txt': No such file or directory
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
ls: cannot access 'asassn_transients_list.txt': No such file or directory
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
ls: cannot access 'tocp_transients_list.txt': No such file or directory