Opened 14 years ago
#1506 new defect
negative window found in psphotStack psf matching
| Reported by: | bills | Owned by: | bills |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | psphot | Version: | |
| Severity: | normal | Keywords: | |
| Cc: |
Description
We are getting a number of staicsky failures where the psf matching fails due to a negative kron radius calculation. See log excerpt below.
The images don't look particularly bad.
Recent examples are sky_id 193594 and 193468
Filtered out 58 of 538 sources
built background image: 2.496715 sec
image sky : mean -5.720879, stdev 296.211211, dQ 0.561366
background sky : min -31.189825 mean -5.720878 max 16.422895 stdev 8.532555
Iso-kernel region: [21:6285,21:6267] out of 6307,6289
Found 29 stamps
Kron Radii vs FWHMs 1: fwhm: 6.000000, kron 3.414591
Kron Radii vs FWHMs 2: fwhm: 7.308946, kron -3.452876
Windows from Kron Radii: 9.390125 for 1, -9.495409 for 2
Error in the psphot image loop
-> pmSubtractionStampsGetWindow (pmSubtractionStamps.c:945): Unable to select stamps for PSF-matching
Unable to determine normalisation window size (2).
-> pmSubtractionMatch (pmSubtractionMatch.c:710): Unable to select stamps for PSF-matching
Unable to get stamp window.
-> matchKernel (psphotStackMatchPSFsUtils.c:303): Unable to select stamps for PSF-matching
