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  1. Data Management
  2. DM-20558

Investigate rescaling the coadd variances for difference imaging templates

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    • Story Points:
      8
    • Sprint:
      AP F19-1, AP F19-4 (2H September), AP F19-5 (October), AP F19-6 (November)
    • Team:
      Alert Production

      Description

      Yusra AlSayyad identified in the June '19 False Positive Sprint that the variances were wrong by 10-15% (
      https://nbviewer.jupyter.org/github/yalsayyad/dm_notebooks/blob/master/examples/DiaSourceCensusCcdVisitNight-HSC-RC2.ipynb). This is likely due to pixel covariances introduced by coaddition and warping. This ticket is to investigate rescaling the variances appropriately with ScaleVariance.

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              Assignee:
              gkovacs Gabor Kovacs
              Reporter:
              ebellm Eric Bellm
              Reviewers:
              Yusra AlSayyad
              Watchers:
              Eric Bellm, Gabor Kovacs, John Swinbank, Paul Price, Yusra AlSayyad
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                Updated:
                Resolved: