Details
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Type:
Story
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Status: Won't Fix
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Resolution: Done
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Fix Version/s: None
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Component/s: Validation
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Labels:None
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Story Points:1
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Epic Link:
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Team:SQuaRE
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.
Attachments
Activity
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.
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. 
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