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  1. Data Management
  2. DM-9442

Understand why ZOGY has a better detection rate than A&L(decorrelation) in simulated diffims

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    • Type: Story
    • Status: To Do
    • Resolution: Unresolved
    • Fix Version/s: None
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      Description

      In DM-8796, it was found that:

      ZOGY seems to have better performance than A&L(decorr) (better true-positive rate, similar rate false positives). Part of this may be the windowing issue (losing detections in convolution window around image edge) but I tried to prevent any transients from being placed near edges and still seeing this effect a little (~10% difference).
      – Tested - could be misalignment of PSF. TRY: re-run with bigger matching radius (this is not the problem)
      – Tested - could be issue with ALdecorr PSF. TRY: compare ALdecorr PSF with ZOGY psf (PSFs are slightly different)
      – Tested - different PSFs are related to imperfect PSF matching. Tried other parameters for basis (e.g. make them somewhat smaller) which improved the AL result slightly.
      – TODO: investigate basis function generation for A&L (and use comparison with ZOGY as a method for evaluation).

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              • Assignee:
                reiss David Reiss
                Reporter:
                reiss David Reiss
                Watchers:
                David Reiss, Simon Krughoff
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