PhotometricColorCalibration err, TypeError: area is null, Could not locate stars

[smccully]

This seems like a BugReport, but i am not entirely sure if there is something else wrong.

PhotometricColorCalibration is failing, the Image was already plate solved with ImageSolver but PhotoMetricColorCalibration fails with an error. It looks like the CSV file it is expecting to find stars in is empty.

Turning on ForcePlate Solving still is able to plate solve the image, but the same error "Could not locate stars" occurs.

Code: [Select]

-rw-r--r-- 1 smccully smccully    0 Feb 23 18:29 /tmp/PCC_B_DI6JRLH5V8TV.csv
-rw-r--r-- 1 smccully smccully  340 Feb 23 18:29 /tmp/PCC_PSF_Flux.csv
-rw-r--r-- 1 smccully smccully  345 Feb 23 18:29 /tmp/PCC_Flux_Ap12.csv


Code: [Select]

PhotometricColorCalibration: Processing view: IC2177_NB
Writing swap files...
2583.508 MiB/s

* Using an automatically calculated photometric aperture of 12 pixels.

* Using an automatically calculated limit magnitude of 10.

run -x -p="phot_apertureShape,1" -p="phot_minimumAperture,12" -p="phot_apertureSteps,1" -p="phot_apertureStepSize,1" -p="phot_bkgWindowMode,1" -p="phot_bkgModel,1" -p="phot_backgroundSigmaLow,5" -p="phot_backgroundSigmaHigh,2.7" -p="phot_bkgAperture1,45" -p="phot_bkgAperture2,60" -p="phot_bkgMMTlayers,8" -p="phot_minSNR,4" -p="phot_showFoundStars,false" -p="phot_maxMagnitude,10" -p="phot_defaultFocal,621.011" -p="phot_gain,1" -p="phot_saturationThreshold,0.95" -p="phot_manualFilter,true" -p="phot_filter,Johnson V" -p="phot_filterKeyword,FILTER" -p="phot_margin,15" -p="phot_catalogName,APASS" -p="phot_catalogFilter,Vmag" -p="phot_vizierServer,http://cdsarc.u-strasbg.fr/" -p="phot_useActive,false" -p="phot_extractMode,0" -p="phot_manualObjects,[]" -p="phot_outputDir,/tmp" -p="phot_outputPrefix,PCC_" -p="phot_generateFileTable,true" -p="phot_generateFluxTable,true" -p="phot_generatePSFFluxTable,true" -p="phot_generateBackgTable,false" -p="phot_generateSNRTable,false" -p="phot_generateFlagTable,false" -p="phot_saveDiagnostic,false" -p="phot_autoSolve,false" -p="phot_forceSolve,false" -p="phot_solverUseImageMetadata,true" -p="phot_saveSolve,false" -p="phot_solveSuffix,_WCS" -p="phot_generateErrorLog,false" -p="phot_showBackgroundModel,false" -p="phot_files,/tmp/PCC_R_5MBH2LY0U23F.xisf|/tmp/PCC_G_5U1PG0E9MT5Y.xisf|/tmp/PCC_B_DI6JRLH5V8TV.xisf" -p="non_interactive,true" -p="isGlobalTarget,true" -p="isViewTarget,false" "/home/smccully/PixInsight/src/scripts/AdP/AperturePhotometry.js"

Processing script file: /home/smccully/PixInsight/src/scripts/AdP/AperturePhotometry.js

*******************************
Processing image /tmp/PCC_R_5MBH2LY0U23F.xisf

Reading image:
/tmp/PCC_R_5MBH2LY0U23F.xisf
Loading image: w=17972 h=11949 n=1 Gray UInt16
8 image properties
26 FITS keyword(s) extracted.
* Loaded astrometric solution:
Referentiation matrix (world[ra,dec] = matrix * image[x,y]):
 -3.46828237e-04  +9.11957003e-07  +3.11130107e+00
 -9.28348997e-07  -3.46980490e-04  +2.08132423e+00
WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [8986.435018 5974.346512] px -> [RA:  7 12 05.601  Dec: -10 27 23.89]
Resolution ............... 1.249 arcsec/px
Rotation ................. -0.165 deg
Observation start time ... 2020-02-05 12:00:00 UTC
Focal distance ........... 621.01 mm
Pixel size ............... 3.76 um
Field of view ............ 6d 14' 4.5" x 4d 8' 42.6"
Image center ............. RA:  7 12 05.638  Dec: -10 27 24.08
Image bounds:
   top-left .............. RA:  7 24 39.112  Dec:  -8 21 49.79
   top-right ............. RA:  6 59 29.489  Dec:  -8 22 49.38
   bottom-left ........... RA:  7 24 51.891  Dec: -12 30 05.99
   bottom-right .......... RA:  6 59 22.013  Dec: -12 31 06.37

Reference image: PCC_R_5MBH2LY0U23F

Downloading Vizier data:
http://cdsarc.u-strasbg.fr/viz-bin/asu-tsv?-source=II/336/apass9&-c=108.023491 -10.456688&-c.r=5.606801&-c.u=deg&-out.form=|&-out.add=_RAJ,_DEJ&-out=B-V&-out=Vmag&-out=Bmag&-out=g'mag&-out=r'mag&-out=i'mag&Vmag=0..10
54196 bytes transferred in 14.42 s @ 3.67 KiB/s
Removed 0 duplicate objects
FOV:5.607 actual:5.601
Catalog APASS size: 224 objects inside the image

Catalog stars: 780
Star search aperture: 3.20 pixels
1 view(s)
223 star(s)
1 PSF fittings
Reference stars: 1
Validating reference stars
Stars with problems: 0
Calculating image noise: sigma=1662.689 count=17.07% layers=4
Multiscale median transform: done
Multiscale reconstruction: done
Normalizing sample values: done
Aperture Photometry:
  Aperture: 12.000000 px
  Image resolution: 1.248860 sec/px
Calculating photometry: Processed 1 stars in 0.002000 seconds
Writing output file: /tmp/PCC_R_5MBH2LY0U23F.csv

*******************************
Processing image /tmp/PCC_G_5U1PG0E9MT5Y.xisf

Reading image:
/tmp/PCC_G_5U1PG0E9MT5Y.xisf
Loading image: w=17972 h=11949 n=1 Gray UInt16
8 image properties
26 FITS keyword(s) extracted.
* Loaded astrometric solution:
Referentiation matrix (world[ra,dec] = matrix * image[x,y]):
 -3.46828237e-04  +9.11957003e-07  +3.11130107e+00
 -9.28348997e-07  -3.46980490e-04  +2.08132423e+00
WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [8986.435018 5974.346512] px -> [RA:  7 12 05.601  Dec: -10 27 23.89]
Resolution ............... 1.249 arcsec/px
Rotation ................. -0.165 deg
Observation start time ... 2020-02-05 12:00:00 UTC
Focal distance ........... 621.01 mm
Pixel size ............... 3.76 um
Field of view ............ 6d 14' 4.5" x 4d 8' 42.6"
Image center ............. RA:  7 12 05.638  Dec: -10 27 24.08
Image bounds:
   top-left .............. RA:  7 24 39.112  Dec:  -8 21 49.79
   top-right ............. RA:  6 59 29.489  Dec:  -8 22 49.38
   bottom-left ........... RA:  7 24 51.891  Dec: -12 30 05.99
   bottom-right .......... RA:  6 59 22.013  Dec: -12 31 06.37

Reference image: PCC_G_5U1PG0E9MT5Y
Star search aperture: 3.20 pixels
1 view(s)
223 star(s)
0 PSF fittings
*** Error: Failure to process image file '/tmp/PCC_G_5U1PG0E9MT5Y.xisf': Could not locate any stars in the image

*******************************
Processing image /tmp/PCC_B_DI6JRLH5V8TV.xisf

Reading image:
/tmp/PCC_B_DI6JRLH5V8TV.xisf
Loading image: w=17972 h=11949 n=1 Gray UInt16
8 image properties
26 FITS keyword(s) extracted.
* Loaded astrometric solution:
Referentiation matrix (world[ra,dec] = matrix * image[x,y]):
 -3.46828237e-04  +9.11957003e-07  +3.11130107e+00
 -9.28348997e-07  -3.46980490e-04  +2.08132423e+00
WCS transformation ....... Linear
Projection ............... Gnomonic
Projection origin ........ [8986.435018 5974.346512] px -> [RA:  7 12 05.601  Dec: -10 27 23.89]
Resolution ............... 1.249 arcsec/px
Rotation ................. -0.165 deg
Observation start time ... 2020-02-05 12:00:00 UTC
Focal distance ........... 621.01 mm
Pixel size ............... 3.76 um
Field of view ............ 6d 14' 4.5" x 4d 8' 42.6"
Image center ............. RA:  7 12 05.638  Dec: -10 27 24.08
Image bounds:
   top-left .............. RA:  7 24 39.112  Dec:  -8 21 49.79
   top-right ............. RA:  6 59 29.489  Dec:  -8 22 49.38
   bottom-left ........... RA:  7 24 51.891  Dec: -12 30 05.99
   bottom-right .......... RA:  6 59 22.013  Dec: -12 31 06.37

Reference image: PCC_B_DI6JRLH5V8TV
Calculating image noise: sigma=2335.221 count=39.07% layers=4
Multiscale median transform: done
Multiscale reconstruction: done
Normalizing sample values: done
Aperture Photometry:
  Aperture: 12.000000 px
  Image resolution: 1.248860 sec/px
Calculating photometry: Processed 0 stars in 0.000000 seconds
Writing output file: /tmp/PCC_B_DI6JRLH5V8TV.csv
*** Error: Failure to process image file '/tmp/PCC_B_DI6JRLH5V8TV.xisf': TypeError: area is null
Writing table: /tmp/PCC_PSF_Flux.csv
Writing table: /tmp/PCC_Flux_Ap12.csv

*******************************
Photometry process finished:
   1 of 3 images processed successfully.
   2 images with errors.
   2 errors and warnings.

*** Error: Failure to calculate photometry: IC2177_NB
Reading swap files...
1805.102 MiB/s
<* failed *>


[johnpane]

PCC has two phases, astrometry and aperture photometry. Your failure is occurring in the second phase. Try setting the limit magnitude to higher value.

[smccully]

Thank you, that did work. Interesting, not really sure i understand why. But, this was a 4 panel mosaic and i had run PCC on all 4 panels prior to the merge and was running PCC on the Merged Mosaic which is when it started failing.