## VaST run with SExtractor config file default.sex.telephoto_lens_onlybrightstars_v1 ##
Images processed 4
Images used for photometry 3
Ref. image: 2461032.81064075 23.12.2025 07:27:09.361 /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
First image: 2461032.81064075 23.12.2025 07:27:09.361 /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
Last image: 2461258.90097909 06.08.2026 09:37:14.593 /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.: -7.65
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): 16858
Objects passed selection criteria: 16693
Measurements per detected object (mean, median, min, max): 2.0 2.0 2 3
Measurements per selected object (mean, median, min, max): 2.0 2.0 2 3
Average stars detected per image: 12494
Average stars matched: 12148.3 (97.2333 %)
Memory usage VmPeak: 243536 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on Wed Aug 5 15:05:04 CDT 2026
VaST build number 1.0rc89-189-g49d3cdfd
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-05)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on Thu Aug 6 04:41:29 CDT 2026
Host name: tau
***** IMAGE PROCESSING ERROR (less than 4 images processed) *****
############################################################
## VaST run with SExtractor config file default.sex.telephoto_lens_vSTL ##
Images processed 4
Images used for photometry 3
Ref. image: 2461032.81064075 23.12.2025 07:27:09.361 /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
First image: 2461032.81064075 23.12.2025 07:27:09.361 /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
Last image: 2461258.90097909 06.08.2026 09:37:14.593 /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
JD time system (TT/UTC/UNKNOWN): UTC
FILTER key from ref. img. header: CV
Magnitude scale: instrumental
Estimated ref. image limiting mag.: -7.31
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: 15 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): 128961
Objects passed selection criteria: 128366
Measurements per detected object (mean, median, min, max): 2.0 2.0 2 3
Measurements per selected object (mean, median, min, max): 2.0 2.0 2 3
Average stars detected per image: 98014
Average stars matched: 92862 (94.7436 %)
Memory usage VmPeak: 538288 kB
Software: VaST 1.0rc90 compiled with gcc (Gentoo 15.2.1_p20260214 p5) 15.2.1 20260214
VaST compiled on Wed Aug 5 15:05:04 CDT 2026
VaST build number 1.0rc89-189-g49d3cdfd
OpenMP enabled: Yes
SExtractor version 2.19.5 (2026-08-05)
GNU bash, version 5.3.9(1)-release (x86_64-pc-linux-gnu)
Processing completed on Thu Aug 6 04:41:46 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:
Tau-04-Q2b1x1
#######################################
########### Starting Tau-04-Q2b1x1 ###########
Processing Tau-04-Q2b1x1
server tau has sufficient free disk space available: 236409 MB at /data_ssd/NMW-TexasTech/workdir
server tau has sufficient free disk space available: 236409 MB at .
Checking input images (2 new)
REFERENCE_EPOCH__FIRST_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
REFERENCE_EPOCH__SECOND_IMAGE= /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits
Small preview (one of the new images): 
Large previews of the second-epoch (new) images:
MAKE_PNG_PLOTS=yes
renamed 'Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.png' -> 'transient_report/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits_preview.png'
Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
renamed 'Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.png' -> 'transient_report/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits_preview.png'
Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.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= 599.0891
INFO: REFERENCE_EPOCH__FIRST_IMAGE_SD= 758.4070
INFO: SECOND_EPOCH__FIRST_IMAGE_MEAN_VALUE= 4735.4197
INFO: SECOND_EPOCH__FIRST_IMAGE_SD= 1062.3658
INFO: SECOND_EPOCH__SECOND_IMAGE_MEAN_VALUE= 4684.1842
INFO: SECOND_EPOCH__SECOND_IMAGE_SD= 1039.3398
----------------------------------------------
INFO: ref_to_second_epoch_img_mean_ratio= 7.90437
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 = 24.25 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE = T / C# FITS" status=0
Record 2: "BITPIX = 16" status=0
Record 3: "NAXIS = 2 / Dimensionality" status=0
Record 4: "NAXIS1 = 9576" status=0
Record 5: "NAXIS2 = 6388" status=0
Record 6: "BZERO = 32768" status=0
Record 7: "EXTEND = T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT' / Type of exposure" status=0
Record 9: "EXPOSURE= 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME = 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-06T04:36:27.9229091' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-06T09:36:27.9229091' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS = 61258.4003231712 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-06T09:36:37.8275239' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG = 61258.4004378123 / 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 = 83.0760390552811 / [deg] RA of telescope" status=0
Record 32: "DEC = 21.999598441452 / [deg] Declination of telescope" status=0
Record 33: "CENTALT = 14.9630555555556 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ = 73.2519444444444 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS = 3.81945666399909 / 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 = 'Tau-04' / Name of the object of interest" status=0
Record 46: "OBJCTRA = '05 32 19' / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+22 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 = 20440 / [step] Focuser position" status=0
Record 51: "FOCUSPOS= 20440 / [step] Focuser position" status=0
Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP = 24.25 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM= 24.25 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN' / FITS Image Orientation" status=0
Record 56: "EQUINOX = 2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP = 20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP = 13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP = 85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP = 85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP = 20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL = 6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF = 235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET = 20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM = T / isLongExposureMode" status=0
Record 67: "QHY_OFF0= 3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits 9576 6388 16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388 16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/d_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits :)
Spent 0.504958 seconds
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/d_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits 9576 6388 16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388 16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits :)
No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__FIRST_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
EXPTIME = 20.0 / [s] Exposure duration
SET-TEMP= 0.0 / [degC] CCD temperature setpoint
CCD-TEMP= -0.0 / [degC] CCD temperature
FOCTEMP = 24.2600002288818 / [degC] Focuser temperature
Exploring image header: /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
Header: 67 keys total, 4 keys left
Record 0: "" status=0
Record 1: "SIMPLE = T / C# FITS" status=0
Record 2: "BITPIX = 16" status=0
Record 3: "NAXIS = 2 / Dimensionality" status=0
Record 4: "NAXIS1 = 9576" status=0
Record 5: "NAXIS2 = 6388" status=0
Record 6: "BZERO = 32768" status=0
Record 7: "EXTEND = T / Extensions are permitted" status=0
Record 8: "IMAGETYP= 'LIGHT' / Type of exposure" status=0
Record 9: "EXPOSURE= 20.0 / [s] Exposure duration" status=0
Record 10: "EXPTIME = 20.0 / [s] Exposure duration" status=0
Record 11: "DATE-LOC= '2026-08-06T04:37:14.5932475' / Time of observation (local)" status=0
Record 12: "DATE-OBS= '2026-08-06T09:37:14.5932475' / Time of observation (UTC)" status=0
Record 13: "MJD-OBS = 61258.4008633448 / Modified Julian Date of observation" status=0
Record 14: "DATE-AVG= '2026-08-06T09:37:24.4942014' / Averaged midpoint time (UTC)" status=0
Record 15: "MJD-AVG = 61258.4009779398 / 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 = 83.0760389841282 / [deg] RA of telescope" status=0
Record 32: "DEC = 21.9995984440372 / [deg] Declination of telescope" status=0
Record 33: "CENTALT = 15.1161111111111 / [deg] Altitude of telescope" status=0
Record 34: "CENTAZ = 73.3463888888889 / [deg] Azimuth of telescope" status=0
Record 35: "AIRMASS = 3.78278761495252 / 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 = 'Tau-04' / Name of the object of interest" status=0
Record 46: "OBJCTRA = '05 32 19' / [H M S] RA of imaged object" status=0
Record 47: "OBJCTDEC= '+22 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 = 20440 / [step] Focuser position" status=0
Record 51: "FOCUSPOS= 20440 / [step] Focuser position" status=0
Record 52: "FOCUSSZ = 0.0 / [um] Focuser step size" status=0
Record 53: "FOCTEMP = 24.2600002288818 / [degC] Focuser temperature" status=0
Record 54: "FOCUSTEM= 24.2600002288818 / [degC] Focuser temperature" status=0
Record 55: "ROWORDER= 'TOP-DOWN' / FITS Image Orientation" status=0
Record 56: "EQUINOX = 2000.0 / Equinox of celestial coordinate system" status=0
Record 57: "SWCREATE= 'N.I.N.A. 3.2.0.9001 (x64)' / Software that created this file" status=0
Record 58: "QHY_EXP = 20.000096 / [s] Actual exposure time" status=0
Record 59: "QHY_PP = 13888.0 / [ps] pixelPeriod" status=0
Record 60: "QHY_LP = 85000.0 / [ns] linePeriod" status=0
Record 61: "GPS_LP = 85000.0 / [ns] linePeriod" status=0
Record 62: "QHY_FP = 20000160.0 / [us] framePeriod" status=0
Record 63: "QHY_CPL = 6120.0 / clocksPerLine" status=0
Record 64: "QHY_LPF = 235295.0 / linesPerFrame" status=0
Record 65: "QHY_AET = 20000096.0 / [us] actualExposureTime" status=0
Record 66: "QHY_LEM = T / isLongExposureMode" status=0
Record 67: "QHY_OFF0= 3767.777 / [us] RollingShutterEndOffset row 0" status=0
Allocating memory for image, dark and result arrays...
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits 9576 6388 16 bitpix
SET-TEMP= 0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
SET-TEMP= 0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
CCD-TEMP= -0.000000 for /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
CCD-TEMP= -0.000000 for /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit
Reading dark frame /var/www/nmw_calibration/TTUQ2b1x1/darks/mdark_TTUQ2b1x1_0C_20s_2026-07-30.fit 9576 6388 16 bitpix
Dark frame is subtracted, output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/d_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits :)
Spent 0.532901 seconds
renamed 'mdark_TTUQ2b1x1_0C_20s_2026-07-30.png' -> 'transient_report/dark.png'
try_to_calibrate_the_input_frame(): selected flat field /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit from directory /var/www/nmw_calibration/TTUQ2b1x1/flats
MegaDivider v7
Reading image /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/d_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits 9576 6388 16 bitpix
Reading flat /var/www/nmw_calibration/TTUQ2b1x1/flats/mff_TTUQ2b1x1_2026-07-30.fit 9576 6388 16 bitpix
Avarage count on flat field image: 19899.553568
Minimal real count (from overscan): 5
Output is written to /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits :)
No overscan detected - all values seem high! (left_median=13115.0, right_median=15628.5)
renamed 'mff_TTUQ2b1x1_2026-07-30.png' -> 'transient_report/flat.png'
Using calibrated image CALIBRATED_SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.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_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
SECOND_EPOCH__SECOND_IMAGE=/data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
Previews of the CALIBRATED second-epoch images:
fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.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/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
SExtractor catalog cache: saved Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits.cat to cache
SExtractor catalog cache: saved Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.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/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
Last image: 2461258.90043891 06.08.2026 09:36:27.922 UTC
ERROR running VaST on the field Tau-04-Q2b1x1 (less than 4 images processed)
exp_start= 23.12.2025 07:27:09.361 exp= 20.000 JD= 2461032.81064075 ap= 6.0 rotation= 0.000 *detected= 19185 *matched= 19185 status=OK /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
exp_start= 22.02.2026 02:27:39.069 exp= 20.000 JD= 2461093.60265126 ap= 5.9 rotation= -0.099 *detected= 17439 *matched= 16858 status=OK /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits
exp_start= 06.08.2026 09:36:27.922 exp= 20.000 JD= 2461258.90043891 ap= 6.2 rotation= -178.034 *detected= 819 *matched= 371 status=ERROR /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
exp_start= 06.08.2026 09:37:14.593 exp= 20.000 JD= 2461258.90097909 ap= 6.0 rotation= -178.106 *detected= 858 *matched= 402 status=OK /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.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/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
SExtractor catalog cache: saved Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits.cat to cache
SExtractor catalog cache: saved Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits.cat to cache
VaST run complete with default.sex.telephoto_lens_vSTL
The four input images were /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
Last image: 2461258.90043891 06.08.2026 09:36:27.922 UTC
ERROR running VaST on the field Tau-04-Q2b1x1 (less than 4 images processed)
exp_start= 23.12.2025 07:27:09.361 exp= 20.000 JD= 2461032.81064075 ap= 4.5 rotation= 0.000 *detected= 144181 *matched= 144181 status=OK /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2025-12-23_01-27-09_20.00sec_-15.00C_LIGHT_0378.fits
exp_start= 22.02.2026 02:27:39.069 exp= 20.000 JD= 2461093.60265126 ap= 4.4 rotation= -0.098 *detected= 140010 *matched= 128940 status=OK /data_ssd/NMW-TexasTech/reference_imgs/Tau-04-Q2b1x1_2026-02-21_20-27-39_20.00sec_-14.90C_LIGHT_0035.fits
exp_start= 06.08.2026 09:36:27.922 exp= 20.000 JD= 2461258.90043891 ap= 4.5 rotation= -105.078 *detected= 8843 *matched= 1710 status=ERROR /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-36-27_20.00sec_-0.00C_LIGHT_0421.fits
exp_start= 06.08.2026 09:37:14.593 exp= 20.000 JD= 2461258.90097909 ap= 4.4 rotation= -178.105 *detected= 9851 *matched= 5465 status=OK /data_ssd/NMW-TexasTech/workdir//img_2026-08-06_CI_Tau-04-Q2b1x1_043908_TTUQ2b1x1_3682616_n9bxH1pt/fd_Tau-04-Q2b1x1_2026-08-06_04-37-14_20.00sec_-0.00C_LIGHT_0422.fits
########### Completed Tau-04-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: Thu Aug 6 04:41:05 CDT 2026
=======================================
TIMING SExtractor: 2 seconds
TIMING matching_and_photometry: 0 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: 4 seconds
TIMING matching_and_photometry: 4 seconds
TIMING lightcurve_write: 0 seconds
TIMING select_aperture: 5 seconds
VAST_RUN_default.sex.telephoto_lens_vSTL: 17s (0.28 min)
FIELD_Tau-04-Q2b1x1: 36s (0.60 min)
=======================================
TOTAL_RUNTIME: 41s (0.68 min)
Finished: Thu Aug 6 04:41:46 CDT 2026