FITS images used in this processing run:

Field Per-03-Q2b1x1 reference image: Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Field Per-03-Q2b1x1 reference image: Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
Field Per-03-Q2b1x1 second-epoch image: Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Field Per-03-Q2b1x1 second-epoch image: Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits

WARNING: VaST exited with code 1 on the field Per-03-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_onlybrightstars_v1 ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461093.60953049 22.02.2026 02:37:33.434   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
First image: 2461093.60953049 22.02.2026 02:37:33.434   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Last  image: 2461093.61006199 22.02.2026 02:38:19.356   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.71
Magnitude-Size filter: Disabled
For each source choose aperture with the smallest scatter: YES
Photometric errors rescaling: NO
Number of identified bad images: 0
Number of SysRem iterations: 0
User-specified moving object: none
Computation time: 4 seconds
Number of parallel threads: 3
SExtractor parameter file: default.sex
Some important SExtractor parameters:
DETECT_MINAREA  10.0             # minimum number of pixels above threshold
DETECT_THRESH   10.0             #  or , in mag.arcsec-2
ANALYSIS_THRESH 10.0             #  or , in mag.arcsec-2
SATUR_LEVEL     55000.0         # level (in ADUs) at which arises saturation
GAIN            0.37            # detector gain in e-/ADU
VAST_SKIP_INDEX_VS_MAG is set - skipping the lib/index_vs_mag variability-index fitting
Total objects detected (at least 2 times):  17434
Objects passed selection criteria:  17288
Measurements per detected object (mean, median, min, max):    2.0    2.0    2    2
Measurements per selected object (mean, median, min, max):    2.0    2.0    2    2
Average stars detected per image: 18818
Average stars matched: 18104.5 (96.2084 %)
Memory usage VmPeak:   244248 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Wed Jul 29 18:03:05 CDT 2026
VaST build number  1.0rc89-187-gf9db235a
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-07-29)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Fri Jul 31 05:28:29 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################
WARNING: VaST exited with code 1 on the field Per-03-Q2b1x1 after completing the measurements (memory cleanup crash); the transient search continues.
## VaST run with SExtractor config file default.sex.telephoto_lens_vSTL ##
Images processed 4
Images used for photometry 2
Ref.  image: 2461093.60953049 22.02.2026 02:37:33.434   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
First image: 2461093.60953049 22.02.2026 02:37:33.434   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Last  image: 2461093.61006199 22.02.2026 02:38:19.356   /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.:  -7.33
Magnitude-Size filter: Disabled
For each source choose aperture with the smallest scatter: YES
Photometric errors rescaling: NO
Number of identified bad images: 0
Number of SysRem iterations: 0
User-specified moving object: none
Computation time: 16 seconds
Number of parallel threads: 3
SExtractor parameter file: default.sex
Some important SExtractor parameters:
DETECT_MINAREA  2.0             # minimum number of pixels above threshold
DETECT_THRESH   3.0             #  or , in mag.arcsec-2
ANALYSIS_THRESH 3.0             #  or , in mag.arcsec-2
SATUR_LEVEL     57000.0         # level (in ADUs) at which arises saturation
GAIN            0.83            # detector gain in e-/ADU
WEIGHT_TYPE BACKGROUND
VAST_SKIP_INDEX_VS_MAG is set - skipping the lib/index_vs_mag variability-index fitting
Total objects detected (at least 2 times):  148640
Objects passed selection criteria:  147973
Measurements per detected object (mean, median, min, max):    2.0    2.0    2    2
Measurements per selected object (mean, median, min, max):    2.0    2.0    2    2
Average stars detected per image: 164103
Average stars matched: 156306 (95.2484 %)
Memory usage VmPeak:   371832 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on  Wed Jul 29 18:03:05 CDT 2026
VaST build number  1.0rc89-187-gf9db235a
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-07-29)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on  Fri Jul 31 05:28:47 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################

######## 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= 15.5
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
DISABLE_NEW_TO_REF_MEAN_IMG_RATIO_CHECK= yes
MAX_NEW_IMG_MEAN_VALUE= 25000
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS= 0.18
MAX_SD_RATIO_OF_SECOND_EPOCH_IMGS_SOFT_LIMIT= 0.12
MPC_CODE= V36
NMW_CALIBRATION= /var/www/nmw_calibration
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_HARD_LIMIT= 10000
NUMBER_OF_DETECTED_TRANSIENTS_BEFORE_FILTERING_SOFT_LIMIT= 8000
OMP_NUM_THREADS= 3
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= 5
SYSREM_ITERATIONS= 0
TELESCOP= 
TELESCOP_NAME_KNOWN_TO_VaST_FOR_FOV_DETERMINATION= 
UCAC5_PLATESOLVE_ITERATIONS= 2
FPACK_FULLY_CALIBRATED_IMAGE= no
#######################################
HOSTNAME= tau
USER= 
HOME= 
#######################################
SExtractor catalog cache: enabled, directory /data_ssd/NMW-TexasTech/vast_sextractor_cache
Reference image directory is set to /data_ssd/NMW-TexasTech/reference_imgs
VIZIER_SITE=vizier.cds.unistra.fr
GAIA_DR2_CLIENT=vizquery (lib/vizquery -> VizieR vizier.cds.unistra.fr)
INFO: MAKE_PNG_PLOTS is set to yes
FITS_FILE_EXT=fits
CALIBRATION_STATUS_PREFIX=
Fields in the data directory: 
Per-03-Q2b1x1
#######################################
########### Starting Per-03-Q2b1x1 ###########
Processing Per-03-Q2b1x1
server tau has sufficient free disk space available: 945472 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 945472 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
Small preview (one of the new images): 

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

MAKE_PNG_PLOTS=yes


renamed 'Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.png' -> 'transient_report/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits_preview.png'

Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits


renamed 'Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.png' -> 'transient_report/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits_preview.png'

Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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= 640.8402
INFO:         REFERENCE_EPOCH__FIRST_IMAGE_SD= 779.6159
INFO:    SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 9976.0783
INFO:            SECOND_EPOCH__FIRST_IMAGE_SD= 3649.9118
INFO:   SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 9906.0108
INFO:           SECOND_EPOCH__SECOND_IMAGE_SD= 3572.6031
----------------------------------------------
INFO:      ref_to_second_epoch_img_mean_ratio= 15.5672
INFO:                  SECOND_EPOCH__SD_ratio= 0.022
INFO: the new-to-reference mean image value ratio check is disabled (DISABLE_NEW_TO_REF_MEAN_IMG_RATIO_CHECK=yes) - expected with a background-subtracted reference image
----------------------------------------------
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=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.4300003051758 / [degC] Focuser temperature
AMBTEMP =                 24.5 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Header: 74 keys total, 33 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-07-31T05:18:00.1019590' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-07-31T10:18:00.1019590' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61252.4291678355 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-07-31T10:18:10.0038265' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61252.4292824422 / 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=                  0.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -0.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0'             / Sensor readout mode" status=0
Record 27: "USBLIMIT=                   50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-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      =     71.9986077466676 / [deg] RA of telescope" status=0
Record 32: "DEC     =     45.9999245352873 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     36.1422222222222 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     54.2577777777778 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.69247909753144 / 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  = 'Per-03'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '04 48 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+46 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 =     23.4300003051758 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.4300003051758 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                 13.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 51.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               901.49 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 24.5 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 55.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             7.200576 / [kph] Wind gust" status=0
Record 61: "WINDSPD =              4.00032 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/d_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits :)

Spent 0.514072 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-26.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-08.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/d_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-08.fit 9576 6388  16 bitpix
Avarage count on flat field image: 33794.829350
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits :)


No overscan detected - all values seem high! (left_median=21727.0, right_median=27156.0)
renamed 'mff_TTUQ2b1x1_2026-07-08.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
EXPTIME =                 20.0 / [s] Exposure duration
SET-TEMP=                  0.0 / [degC] CCD temperature setpoint
CCD-TEMP=                 -0.0 / [degC] CCD temperature
FOCTEMP =     23.4500007629395 / [degC] Focuser temperature
AMBTEMP =                 24.5 / [degC] Ambient air temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits 
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Header: 74 keys total, 33 keys left
Record 0: "" status=0
Record 1: "SIMPLE  =                    T / C# FITS" status=0
Record 2: "BITPIX  =                   16" status=0
Record 3: "NAXIS   =                    2 / Dimensionality" status=0
Record 4: "NAXIS1  =                 9576" status=0
Record 5: "NAXIS2  =                 6388" status=0
Record 6: "BZERO   =                32768" status=0
Record 7: "EXTEND  =                    T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT'              / Type of exposure" status=0
Record 9: "EXPOSURE=                 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME =                 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-07-31T05:18:50.9343078' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-07-31T10:18:50.9343078' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS =     61252.4297561804 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-07-31T10:19:00.8376388' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG =     61252.4298707987 / 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=                  0.0 / [degC] CCD temperature setpoint" status=0
Record 25: "CCD-TEMP=                 -0.0 / [degC] CCD temperature" status=0
Record 26: "READOUTM= '2CMS-0'             / Sensor readout mode" status=0
Record 27: "USBLIMIT=                   50 / Camera-specific USB setting" status=0
Record 28: "TELESCOP= 'QHY600M-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      =     71.9986076666168 / [deg] RA of telescope" status=0
Record 32: "DEC     =     45.9999245326325 / [deg] Declination of telescope" status=0
Record 33: "CENTALT =     36.2833333333333 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ  =     54.2997222222222 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS =     1.68682669997524 / 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  = 'Per-03'             / Name of the object of interest" status=0
Record 46: "OBJCTRA = '04 48 00'           / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+46 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 =     23.4500007629395 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM=     23.4500007629395 / [degC] Focuser temperature" status=0
Record 55: "DEWPOINT=                 13.7 / [degC] Dew point" status=0
Record 56: "HUMIDITY=                 51.0 / [percent] Relative humidity" status=0
Record 57: "PRESSURE=               901.49 / [hPa] Air pressure" status=0
Record 58: "AMBTEMP =                 24.5 / [degC] Ambient air temperature" status=0
Record 59: "WINDDIR =                 55.0 / [deg] Wind direction: 0=N, 180=S, 90=E, 270=W" status=0
Record 60: "WINDGUST=             7.200576 / [kph] Wind gust" status=0
Record 61: "WINDSPD =              4.00032 / [kph] Wind speed" status=0
Record 62: "ROWORDER= 'TOP-DOWN'           / FITS Image Orientation" status=0
Record 63: "EQUINOX =               2000.0 / Equinox of celestial coordinate system" status=0
Record 64: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 65: "QHY_EXP =            20.000096 / [s] Actual exposure time" status=0
Record 66: "QHY_PP  =              13888.0 / [ps] pixelPeriod" status=0
Record 67: "QHY_LP  =              85000.0 / [ns] linePeriod" status=0
Record 68: "GPS_LP  =              85000.0 / [ns] linePeriod" status=0
Record 69: "QHY_FP  =           20000160.0 / [us] framePeriod" status=0
Record 70: "QHY_CPL =               6120.0 / clocksPerLine" status=0
Record 71: "QHY_LPF =             235295.0 / linesPerFrame" status=0
Record 72: "QHY_AET =           20000096.0 / [us] actualExposureTime" status=0
Record 73: "QHY_LEM =                    T / isLongExposureMode" status=0
Record 74: "QHY_OFF0=             3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits 9576 6388  16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-26.fit 9576 6388  16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/d_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits :)

Spent 0.585834 seconds 
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-26.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-08.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/d_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits 9576 6388  16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-08.fit 9576 6388  16 bitpix
Avarage count on flat field image: 33794.829350
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits :)


No overscan detected - all values seem high! (left_median=21727.0, right_median=27156.0)
renamed 'mff_TTUQ2b1x1_2026-07-08.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Dark frame used to calibrate the second-epoch images:



Flat field used to calibrate the second-epoch images:



after the calibration attempt:
SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Previews of the CALIBRATED second-epoch images:


fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits



fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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 --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
  
Last  image: 2461252.92928358 31.07.2026 10:18:00.101 UTC
WARNING: VaST exited with code 1 on the field Per-03-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

Parsing command line arguments...
opt 'F': Will NOT create flag images for SExtractor
opt '5': 5.000000 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/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.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/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.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_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz)...  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 --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
Setting the fixed star match radius of 5.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits catalog from cache
SExtractor catalog cache: restored Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits catalog from cache
Running SExtractor in 3 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2Parent process says: we are done fork()ing.
b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
The above guess is based on the non-default gain value specified in default.sex by user
Waiting for thread 2 to finish...
The gain value (GAIN=0.370) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
The above guess is based on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00004.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 5.9,5.9,5.3,6.5,7.0,7.6 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.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_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-02-22T02:37:33.4340663
Setting observation time using DATE-OBS keyword: 2026-02-22T02:37:33.4340663

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-02-22T02:37:33.434
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Exposure 20 sec, 22.02.2026 02:37:33.434 UTC = JD(UTC) 2461093.60953049 mid. exp.
The reference image star  8046.127    20.634 is rejected, see bad_region.lst
The reference image star  8309.953    29.655 is rejected, see bad_region.lst
The reference image star  7991.184    30.757 is rejected, see bad_region.lst
The reference image star  9064.214    19.930 is rejected, see bad_region.lst
The reference image star  9032.731    18.861 is rejected, see bad_region.lst
The reference image star  8032.596    18.264 is rejected, see bad_region.lst
The reference image star  8717.654    17.293 is rejected, see bad_region.lst
The reference image star  9045.364    17.015 is rejected, see bad_region.lst
The reference image star  8103.194    15.993 is rejected, see bad_region.lst
The reference image star  8846.494    11.405 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: 18775, (18775 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: 4969
 * rejected close to frame edge: 100
 * rejected as being too small (<1.5 pix): 0
 * rejected as being too large (>6.0 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 3
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.

Please note: the CCD position-dependent magnitude correction will be applied.
get_detection_limit_sn(): Detection limit: -7.71
Detection limit from the magnitude-SNR relation= -7.7  (5.0 sigma detection)
The simple faintest star detection limit= -9.7
80 percent brightest stars detection limit= -10.6
Selected detection limit= -10.6
Final detection limit= -10.6 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.06.0 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): 5
 * 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'.
    18861 * detected, using  502/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.021844, number_of_ambiguous_matches=412 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=17463 inliers=17463 rms 0.49 -> 0.49 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.013202, number_of_ambiguous_matches=249 
17448 * matched, [CVPOLY iter 2: order=1 pairs=17448 inliers=17448 rms 0.27 -> 0.27 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.007635, number_of_ambiguous_matches=144 
17440 * matched (2nd iteration). [CVPOLY iter 3: order=2 pairs=17440 inliers=17440 rms 0.19 -> 0.19 pix, max corner correction 0.2 pix] fraction_of_ambiguous_matches= 0.003075, number_of_ambiguous_matches=58 
17434 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.008
    18861 stars detected, 17434 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 15310, N_manually_selected_comparison_stars = 0
Using 15310 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 15310 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00000*X_pix -0.00000*Y_pix -0.00002
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 15309 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.71
    20202 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  207980 kB used, 244248 kB peak, 65263848 kB available RAM
processed 2 of 4 images ( 50.0%)



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-07-31T10:18:00.1019590
Setting observation time using DATE-OBS keyword: 2026-07-31T10:18:00.1019590

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-07-31T10:18:00.101
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
The star  9179.147  5237.748 is rejected, see bad_region.lst
The star  7711.143  5334.019 is rejected, see bad_region.lst
The star  8911.818  5352.156 is rejected, see bad_region.lst
The star  9485.575  5358.018 is rejected, see bad_region.lst
The star  9158.828  6385.531 is rejected, see bad_region.lst
The star  7872.825  6378.754 is rejected, see bad_region.lst
The star  8792.060  6367.181 is rejected, see bad_region.lst
The star  9022.925  6307.535 is rejected, see bad_region.lst
The star  9560.681  6302.116 is rejected, see bad_region.lst
The star  8647.539  6297.130 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 205
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 66
 * rejected close to frame edge: 2
 * 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): 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'.
      205 * detected, using  100/ 205 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
the annealed match radius failed on this field, retrying with the strict radius... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 5 < 41 ! Retrying...
  rotation [degrees] = -20.888
      205 stars detected,     5 stars matched
ERROR! Too few stars matched (5 < 41) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-07-31T10:18:50.9343078
Setting observation time using DATE-OBS keyword: 2026-07-31T10:18:50.9343078

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-07-31T10:18:50.934
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
The star  7793.198  3298.967 is rejected, see bad_region.lst
The star  7849.660  5089.110 is rejected, see bad_region.lst
The star  7743.908  5094.548 is rejected, see bad_region.lst
The star  7892.555  5179.373 is rejected, see bad_region.lst
The star  7520.608  5222.737 is rejected, see bad_region.lst
The star  7986.181  5243.203 is rejected, see bad_region.lst
The star  8568.304  5298.445 is rejected, see bad_region.lst
The star  7955.557  5335.642 is rejected, see bad_region.lst
The star  7714.093  5335.511 is rejected, see bad_region.lst
The star  8328.646  5341.145 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 183
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 78
 * rejected close to frame edge: 2
 * 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): 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'.
      183 * detected, using  100/ 183 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=40 inliers=40 rms 9.13 -> 8.85 pix, max corner correction 10.1 pix] fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
the annealed match radius failed on this field, retrying with the strict radius... fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
10 * matched, Too few * matched: 10 < 36 ! Retrying...
  rotation [degrees] =   2.651
      183 stars detected,    10 stars matched
ERROR! Too few stars matched (10 < 36) . Wrong match? Skipping file...
TIMING matching_and_photometry: 1 seconds
Done with measurements! =)

Total number of measurements 37636 (37636 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  4056 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  5285 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for  2486 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for  2265 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for  3342 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: 17288 objects, the longest string is 383 bytes.
Allocating memory for resorting the file.



----***** 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)
_____________________
SExtractor catalog cache: saved Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits.cat to cache
SExtractor catalog cache: saved Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_onlybrightstars_v1
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Last  image: 2461252.92928358 31.07.2026 10:18:00.101 UTC
ERROR running VaST on the field Per-03-Q2b1x1 (less than 4 images processed)
exp_start= 22.02.2026 02:37:33.434  exp=   20.000  JD= 2461093.60953049  ap=  6.0  rotation=   0.000  *detected= 18775  *matched= 18775  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
exp_start= 22.02.2026 02:38:19.356  exp=   20.000  JD= 2461093.61006199  ap=  6.0  rotation=  -0.008  *detected= 18861  *matched= 17434  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
exp_start= 31.07.2026 10:18:00.101  exp=   20.000  JD= 2461252.92928358  ap=  5.9  rotation= -20.888  *detected=   205  *matched=     5  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
exp_start= 31.07.2026 10:18:50.934  exp=   20.000  JD= 2461252.92987192  ap=  5.9  rotation=   2.651  *detected=   183  *matched=    10  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
wait
*------ default.sex.telephoto_lens_vSTL ------*
'default.sex.telephoto_lens_vSTL' -> 'default.sex'
Starting VaST with default.sex.telephoto_lens_vSTL

  ./vast --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
  
Last  image: 2461252.92928358 31.07.2026 10:18:00.101 UTC
WARNING: VaST exited with code 1 on the field Per-03-Q2b1x1 AFTER completing the measurements. This is a memory-management crash during cleanup (a VaST bug to report), NOT a wrong field / clouds / bad focus. The lightcurves were written, so the transient search continues.
____ VaST output (crashed during memory cleanup; the measurements above are complete) ____

--==VaST 1.0rc90==--

Parsing command line arguments...
opt 'F': Will NOT create flag images for SExtractor
opt '5': 5.000000 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/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.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/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.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_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz)...  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 --noflagimage --starmatchraius 5 --matchstarnumber 500 --selectbestaperture --sysrem 0 --type 4 --maxsextractorflag 99 --UTC --nofind --nojdkeyword /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
Setting the fixed star match radius of 5.00 pix
We have 4 images to process.
SExtractor catalog cache: restored Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits catalog from cache
SExtractor catalog cache: restored Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits catalog from cache
Running SExtractor in 3 parallel threads...
Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Using the catalog image00002.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.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 2 to finish...
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00003.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits > image00003.cat.sex_log 2>&1
The gain value (GAIN=0.830) from default.sex will be used for image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
The above guess is based on the non-default gain value specified in default.sex by user
autodetect_aperture() is running SExtractor on /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.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:  2679.0  2807.0  2681.0  2809.0  (defined in bad_region.lst)
Excluding more image regions!.. (will not print them all)
Excluded a total of 31 image regions  (defined in bad_region.lst).
autodetect_aperture() is doing a preliminary SExtractor run to determine an appropriate aperture size
sex -c default.sex  -PARAMETERS_NAME autodetect_aper.param -CATALOG_NAME autodetect_aper_image00004.cat  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.4,4.4,3.9,4.8,5.2,5.7 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00003.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits > image00003.cat.sex_log 2>&1
autodetect_aperture() is doing the main SExtractor run
sex  -PARAMETERS_NAME default.param -PHOT_APERTURES 4.3,4.3,3.9,4.7,5.2,5.6 -VERBOSE_TYPE NORMAL -CATALOG_NAME image00004.cat /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits > image00004.cat.sex_log 2>&1
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Waiting for thread 1 to finish...
autodetect_aperture() is done with image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits


Done with SExtractor!

TIMING SExtractor: 5 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/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-02-22T02:37:33.4340663
Setting observation time using DATE-OBS keyword: 2026-02-22T02:37:33.4340663

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-02-22T02:37:33.434
EXPTIME = 20.000

Using the catalog image00001.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
Exposure 20 sec, 22.02.2026 02:37:33.434 UTC = JD(UTC) 2461093.60953049 mid. exp.
The reference image star  8631.163     1.043 is rejected, see bad_region.lst
The reference image star  9352.602     1.851 is rejected, see bad_region.lst
The reference image star  7697.712     2.148 is rejected, see bad_region.lst
The reference image star  7751.309     1.094 is rejected, see bad_region.lst
The reference image star  7831.739     1.142 is rejected, see bad_region.lst
The reference image star  7884.995     1.606 is rejected, see bad_region.lst
The reference image star  7936.981     1.158 is rejected, see bad_region.lst
The reference image star  8028.376     1.146 is rejected, see bad_region.lst
The reference image star  8099.382     1.268 is rejected, see bad_region.lst
The reference image star  8656.798     1.445 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: 163971, (163971 good for image matching)
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 38
 * rejected inside rectangles defined in bad_region.lst: 31124
 * rejected close to frame edge: 677
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.4 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): 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: -7.33
Detection limit from the magnitude-SNR relation= -7.3  (5.0 sigma detection)
The simple faintest star detection limit= -6.5
80 percent brightest stars detection limit= -7.8
Selected detection limit= -7.8
Final detection limit= -7.8 (after subtracting MAG_TRANSIENT_ABOVE_THE_REFERENCE_FRAME_LIMIT=0.0)

Parameter box for transient search:    10.04.4 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): 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'.
    164235 * detected, using  500/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.019661, number_of_ambiguous_matches=3229 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=148639 inliers=148639 rms 0.32 -> 0.32 pix, max corner correction 0.1 pix] fraction_of_ambiguous_matches= 0.019679, number_of_ambiguous_matches=3232 
148640 * matched, [CVPOLY iter 2: order=1 pairs=148640 inliers=148640 rms 0.32 -> 0.32 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.019679, number_of_ambiguous_matches=3232 
148640 * matched (2nd iteration). [CVPOLY iter 3: order=1 pairs=148640 inliers=148640 rms 0.32 -> 0.32 pix, max corner correction 0.0 pix] fraction_of_ambiguous_matches= 0.019679, number_of_ambiguous_matches=3232 
148640 * matched (3rd iteration). Success!
  rotation [degrees] =  -0.008
    164235 stars detected, 148640 stars matched
Performing magnitude calibration using automatically selected comparison stars
Expecting to find at least 40 * for magnitude calibration
We have N_good_stars = 123162, N_manually_selected_comparison_stars = 0
Using 123162 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 123158 stars for magnitude calibration.
Using the linear CCD position-dependent magnitude correction:
 delta_m = 0.00000*X_pix -0.00000*Y_pix -0.00122
Iteratively removing outliers from the mag-mag relation (weighted linear/polynomial fit)...
Computing robust linear magnitude calibration.
Used 118305 stars for magnitude calibration (after filtering).
get_detection_limit_sn(): Detection limit: -7.33
    179566 objects stored in memory (1000000 max.)
Magnitude calibration is performed successfully!
Saving observations to the cache... OK
memory:  345260 kB used, 371832 kB peak, 65263848 kB available RAM
Total number of measurements 328206 (328206 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_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-07-31T10:18:00.1019590
Setting observation time using DATE-OBS keyword: 2026-07-31T10:18:00.1019590

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-07-31T10:18:00.101
EXPTIME = 20.000

Using the catalog image00003.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
The star  7501.757   780.527 is rejected, see bad_region.lst
The star  8842.997  1331.998 is rejected, see bad_region.lst
The star  1122.993  1550.995 is rejected, see bad_region.lst
The star  8241.561  3116.180 is rejected, see bad_region.lst
The star  9159.475  6386.095 is rejected, see bad_region.lst
The star  9157.561  6384.574 is rejected, see bad_region.lst
The star  8937.380  6384.982 is rejected, see bad_region.lst
The star  8070.168  6387.696 is rejected, see bad_region.lst
The star  9136.523  6381.266 is rejected, see bad_region.lst
The star  7576.127  6383.514 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3317
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 1
 * rejected inside rectangles defined in bad_region.lst: 599
 * rejected close to frame edge: 36
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.4 pix): 0
 * rejected as outliers in mag-size plot: 0
 * rejected as having SExtractor flags > 99 and <= 7: 0
 * rejected as having hopelessly bad SExtractor flags (>7): 0
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     3317 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000061, number_of_ambiguous_matches=11 
refining the coordinate transformation... [CVPOLY iter 1: order=1 pairs=667 inliers=667 rms 3.49 -> 3.49 pix, max corner correction 0.9 pix] fraction_of_ambiguous_matches= 0.000061, number_of_ambiguous_matches=11 
661 * matched, Too few * matched: 661 < 663 ! Retrying...
  rotation [degrees] = 139.900
     3317 stars detected,   661 stars matched
ERROR! Too few stars matched (661 < 663) . Wrong match? Skipping file...



Processing  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
9576x6388 FITS image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Trying to guess the time system by parsing the comment string 'Time of observation (UTC)'
Time system set from the comment to DATE-OBS keyword: 'Time of observation (UTC)'
The input time system is identified as: UTC (blank if unknown)
Setting observation date using DATE-OBS keyword: 2026-07-31T10:18:50.9343078
Setting observation time using DATE-OBS keyword: 2026-07-31T10:18:50.9343078

Observing time converted to the "standard" FITS header format:
DATE-OBS= 2026-07-31T10:18:50.934
EXPTIME = 20.000

Using the catalog image00004.cat SExtracted earlier from the image /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
The star  8843.002  1332.001 is rejected, see bad_region.lst
The star  1122.995  1550.996 is rejected, see bad_region.lst
The star  8242.426  3123.012 is rejected, see bad_region.lst
The star  7793.179  3298.961 is rejected, see bad_region.lst
The star  3322.917  3745.075 is rejected, see bad_region.lst
The star  8072.816  6387.449 is rejected, see bad_region.lst
The star  7513.947  6386.776 is rejected, see bad_region.lst
The star  9161.385  6386.556 is rejected, see bad_region.lst
The star  7579.052  6385.390 is rejected, see bad_region.lst
The star  7875.619  6380.268 is rejected, see bad_region.lst
Excluding more stars falling at bad regions!.. (will not print them all)
SExtractor output filtering results:
 * passed selection: 3034
 * rejected as having no flux measurement: 0
 * rejected as having SNR<3.0: 0
 * rejected inside rectangles defined in bad_region.lst: 632
 * rejected close to frame edge: 23
 * rejected as being too small (<1.1 pix): 0
 * rejected as being too large (>4.3 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): 2
 * rejected due to an external image flag: 0
 * rejected as having bad PSF fit: 0
---
You may change some of the filtering parameters by editing src/vast_limits.h and re-running 'make'.
     3034 * detected, using  100/ 500 * for reference/current image matching, fraction_of_ambiguous_matches= 0.000000, number_of_ambiguous_matches=0 
Too few * matched: 92 < 606 ! Retrying...
  rotation [degrees] =  24.418
     3034 stars detected,    92 stars matched
ERROR! Too few stars matched (92 < 606) . Wrong match? Skipping file...
TIMING matching_and_photometry: 5 seconds
Done with measurements! =)

Total number of measurements 328206 (0 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 26705 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 43056 stars
Aperture with index 3 (REFERENCE_APERTURE_DIAMETER +0.10*REFERENCE_APERTURE_DIAMETER) seems best for 21357 stars
Aperture with index 4 (REFERENCE_APERTURE_DIAMETER +0.20*REFERENCE_APERTURE_DIAMETER) seems best for 20052 stars
Aperture with index 5 (REFERENCE_APERTURE_DIAMETER +0.30*REFERENCE_APERTURE_DIAMETER) seems best for 37470 stars

done!  =)
TIMING select_aperture: 5 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: 147973 objects, the longest string is 385 bytes.
Allocating memory for resorting the file.



----***** 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)
_____________________
SExtractor catalog cache: saved Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits.cat to cache
SExtractor catalog cache: saved Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
Last  image: 2461252.92928358 31.07.2026 10:18:00.101 UTC
ERROR running VaST on the field Per-03-Q2b1x1 (less than 4 images processed)
exp_start= 22.02.2026 02:37:33.434  exp=   20.000  JD= 2461093.60953049  ap=  4.4  rotation=   0.000  *detected= 163971  *matched= 163971  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-37-33_20.00sec_-15.00C_LIGHT_0044.fits
exp_start= 22.02.2026 02:38:19.356  exp=   20.000  JD= 2461093.61006199  ap=  4.4  rotation=  -0.008  *detected= 164235  *matched= 148640  status=OK     /data_ssd/NMW-TexasTech/reference_imgs/Per-03-Q2b1x1_2026-02-21_20-38-19_20.00sec_-15.00C_LIGHT_0045.fits
exp_start= 31.07.2026 10:18:00.101  exp=   20.000  JD= 2461252.92928358  ap=  4.4  rotation= 139.900  *detected=  3317  *matched=   661  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-00_20.00sec_-0.00C_LIGHT_0287.fits
exp_start= 31.07.2026 10:18:50.934  exp=   20.000  JD= 2461252.92987192  ap=  4.3  rotation=  24.418  *detected=  3034  *matched=    92  status=ERROR  /data_ssd/NMW-TexasTech/workdir//img_2026-07-31_CI_Per-03-Q2b1x1_052456_TTUQ2b1x1_3435849_ahKc9wUz/fd_Per-03-Q2b1x1_2026-07-31_05-18-50_20.00sec_-0.00C_LIGHT_0288.fits
########### Completed Per-03-Q2b1x1 ###########
The analysis was running at tau
We are allowed to update the exclusion list at tau host
Found ../exclusion_list_TTUQ2.txt
#### The exclusion list before filtering-out asteroids, bad pixels and adding Gaia sources ####
###################################################################################
renamed 'exclusion_list_index_html.txt_noasteroids' -> 'exclusion_list_index_html.txt'
renamed 'exclusion_list_index_html.txt_nohotpixels' -> 'exclusion_list_index_html.txt'
# Count candidates with no identification (that also don't look like hot pix)
Found 0 unidentified candidates (excluding asteroids, hot pixels and known variable stars).
###################################################################################
0 candidates found (excluding asteroids and hot pixels)
This does not look like a test run
###################################################################################
exclusion_list_gaiadr2.txt NOT FOUND
exclusion_list_apass.txt NOT FOUND
IS_THIS_TEST_RUN=NO  ALLOW_EXCLUSION_LIST_UPDATE= YES
#### Nothing to add to the exclusion list ####
The observatory MPC code is V36
############################################################
ls: cannot access 'planets.txt': No such file or directory
############################################################
Positions of selected moons from JPL HORIZONS for JD(UT):
ls: cannot access 'moons.txt': No such file or directory
############################################################
Positions of selected spacecraft from JPL HORIZONS for JD(UT):
ls: cannot access 'spacecraft.txt': No such file or directory
############################################################
ls: cannot access 'comets.txt': No such file or directory
############################################################
List of recent ASAS-SN transients from https://www.astronomy.ohio-state.edu/asassn/transients.html :
ls: cannot access 'asassn_transients_list.txt': No such file or directory
############################################################
Truncated list of TOCP transients from http://www.cbat.eps.harvard.edu/unconf/tocp.html :
ls: cannot access 'tocp_transients_list.txt': No such file or directory

=== Transient Factory Profiling ===
Started: Fri Jul 31 05:28:02 CDT 2026
=======================================
TIMING SExtractor: 2 seconds
TIMING matching_and_photometry: 1 seconds
TIMING lightcurve_write: 0 seconds
TIMING select_aperture: 1 seconds
    VAST_RUN_default.sex.telephoto_lens_onlybrightstars_v1: 4s (0.07 min)
TIMING SExtractor: 5 seconds
TIMING matching_and_photometry: 5 seconds
TIMING lightcurve_write: 1 seconds
TIMING select_aperture: 5 seconds
    VAST_RUN_default.sex.telephoto_lens_vSTL: 18s (0.30 min)
FIELD_Per-03-Q2b1x1: 35s (0.58 min)
=======================================
TOTAL_RUNTIME: 45s (0.75 min)
Finished: Fri Jul 31 05:28:47 CDT 2026