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Set the PSF-matched coadd's PSF to the model PSF used #110

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Apr 1, 2017
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Set the PSF-matched coadd's PSF to the model PSF used #110

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8 changes: 7 additions & 1 deletion python/lsst/pipe/tasks/assembleCoadd.py
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Original file line number Diff line number Diff line change
Expand Up @@ -619,7 +619,13 @@ def assembleMetadata(self, coaddExposure, tempExpRefList, weightList):
self.inputRecorder.addVisitToCoadd(coaddInputs, tempExp, weight)
coaddInputs.visits.sort()
if self.config.doPsfMatch:
psf = self.config.modelPsf.apply()
# The modelPsf BBox for a psfMatchedWarp/coaddTempExp was dynamically defined by
# ModelPsfMatchTask as the square box bounding its spatially-variable, pre-matched WarpedPsf.
# Likewise, set the PSF of a PSF-Matched Coadd to the modelPsf
# having the maximum width (sufficient because square)
modelPsfList = [tempExp.getPsf() for tempExp in tempExpList]
modelPsfWidthList = [modelPsf.computeBBox().getWidth() for modelPsf in modelPsfList]
psf = modelPsfList[modelPsfWidthList.index(max(modelPsfWidthList))]
else:
psf = measAlg.CoaddPsf(coaddInputs.ccds, coaddExposure.getWcs())
coaddExposure.setPsf(psf)
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7 changes: 4 additions & 3 deletions python/lsst/pipe/tasks/makeCoaddTempExp.py
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Expand Up @@ -179,16 +179,17 @@ def createTempExp(self, calexpRefList, skyInfo, visitId=0):
if numGoodPix > 0 and not didSetMetadata:
coaddTempExp.setCalib(exposure.getCalib())
coaddTempExp.setFilter(exposure.getFilter())
# PSF replaced with CoaddPsf after loop if and only if creating direct warp
coaddTempExp.setPsf(exposure.getPsf())
didSetMetadata = True
except Exception as e:
self.log.warn("Error processing calexp %s; skipping it: %s", calExpRef.dataId, e)
continue
inputRecorder.addCalExp(calExp, ccdId, numGoodPix)

inputRecorder.finish(coaddTempExp, totGoodPix)
if totGoodPix > 0 and didSetMetadata:
coaddTempExp.setPsf(modelPsf if self.config.doPsfMatch else
CoaddPsf(inputRecorder.coaddInputs.ccds, skyInfo.wcs))
if totGoodPix > 0 and didSetMetadata and not self.config.doPsfMatch:
coaddTempExp.setPsf(CoaddPsf(inputRecorder.coaddInputs.ccds, skyInfo.wcs))

self.log.info("coaddTempExp has %d good pixels (%.1f%%)",
totGoodPix, 100.0*totGoodPix/skyInfo.bbox.getArea())
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