Uploaded image for project: 'Data Management'
  1. Data Management
  2. DM-9229

Pad Psfs before PSF-matching

    Details

    • Templates:
    • Story Points:
      6
    • Sprint:
      DRP S17-3, DRP S17-4, DRP S17-5
    • Team:
      Data Release Production

      Description

      Currently, we require that the matching kernel has smaller dimensions than the PSF.
      https://github.com/lsst/ip_diffim/blob/da2cd4f0fcee785084b03b5e20f5a72f1bb85190/src/KernelSolution.cc#L318

      There's a tradeoff between pixels being fit and kernel size. When kernels are too small matched-PSFs look square, but they can't be arbitrarily big. This makes the window of appropriate kernel sizes vary narrow, and in some cases non-existent.

      This ticket will pad the PSF before matching and test whether this solves the matching problems observed matching HSC PsfExPsfs.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                yusra Yusra AlSayyad
                Reporter:
                yusra Yusra AlSayyad
                Reviewers:
                Nate Lust
                Watchers:
                David Reiss, Nate Lust, Yusra AlSayyad
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Summary Panel