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  1. Data Management
  2. DM-5805

Improve star/galaxy separation for validate_drp

    Details

    • Type: Story
    • Status: Won't Fix
    • Resolution: Done
    • Fix Version/s: None
    • Component/s: Validation
    • Labels:
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      Description

      Improve the star/galaxy separation for validate_drp.

      Many of the LSST SRD KPMs are defined for bright, isolated stars. There is clear evidence that galaxies are being included in current runs (they have significantly higher photometric scatter at the same mag|SNR). Improved star/galaxy separation will help generate better numbers

      Stretch goal: Include additional informative plots about how well the `extendedness` value in the catalogs is successfully separating stars and galaxies.

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          wmwood-vasey Michael Wood-Vasey added a comment -

          Paul Price says "If you're interested in getting low false-negative S/G for bright objects, you could push the `fluxRatio` to something like `0.995`. See
          https://github.com/lsst/obs_subaru/blob/master/config/cmodel.py#L9

          Show
          wmwood-vasey Michael Wood-Vasey added a comment - Paul Price says "If you're interested in getting low false-negative S/G for bright objects, you could push the `fluxRatio` to something like `0.995`. See https://github.com/lsst/obs_subaru/blob/master/config/cmodel.py#L9
          Hide
          wmwood-vasey Michael Wood-Vasey added a comment -

          validate_drp should rely on whatever DRP quotes as the star-galaxy separation. So I think validate_drp should remain unchanged – if extendedness improves in discriminatory power then that will improve the validate_drp results.

          Show
          wmwood-vasey Michael Wood-Vasey added a comment - validate_drp should rely on whatever DRP quotes as the star-galaxy separation. So I think validate_drp should remain unchanged – if extendedness improves in discriminatory power then that will improve the validate_drp results.

            People

            • Assignee:
              wmwood-vasey Michael Wood-Vasey
              Reporter:
              wmwood-vasey Michael Wood-Vasey
              Watchers:
              Michael Wood-Vasey
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              Dates

              • Created:
                Updated:
                Resolved: