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  1. Data Management
  2. DM-19660

Bug? The PSF is not warped during image differencing

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    • Story Points:
      4
    • Sprint:
      AP S19-6
    • Team:
      Alert Production

      Description

      It looks like the template PSF is not warped in image differencing. See lines 407-411 of imagePsfMatch.py in ip_diffim. This leads to a much broader PSF being used for calculating the matching kernel if the template is at a finer plate scale than the science image. Also, if the PSF is elliptical, it may end up with the wrong rotation, and this may be causing an increase in "quadrupole" mis-subtractions.

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                • Assignee:
                  sullivan Ian Sullivan
                  Reporter:
                  sullivan Ian Sullivan
                  Reviewers:
                  Jim Bosch
                  Watchers:
                  Eric Bellm, Ian Sullivan, Jim Bosch, John Swinbank, Meredith Rawls
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