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  1. Data Management
  2. DM-5309

Please provide an efficient way to identify sources suitable for aperture correction measurement

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      At present the way we identify sources suitable for aperture measurement is to use sources that the PSF determiner used to determine the PSF. This clumsily entangles measurement with PSF measurement, instead of making measurement self-contained. This leads to awkwardnesses such as the inability to measure aperture correction if we don't fit a PSF model.

      The architecture would be much cleaner if we had an efficient way to identify sources that are suitable for measuring aperture correction, and if our measurement task used that.

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            I think there was a typo in the original description of this issue ("What an efficient way to identify sources suitable for aperture measurement"). I've tweaked it to something that seems to make sense, but please do correct it if I've misunderstood.

            swinbank John Swinbank added a comment - I think there was a typo in the original description of this issue ("What an efficient way to identify sources suitable for aperture measurement"). I've tweaked it to something that seems to make sense, but please do correct it if I've misunderstood.

            Code has changed a bit, but this still seems to be true as of 2019-09-09.

            swinbank John Swinbank added a comment - Code has changed a bit, but this still seems to be true as of 2019-09-09.
            Parejkoj John Parejko added a comment -

            This is related to things I've been thinking of for the new CalibrateImageTask. It might be worth considering this more once the initial version of that is out.

            Parejkoj John Parejko added a comment - This is related to things I've been thinking of for the new CalibrateImageTask. It might be worth considering this more once the initial version of that is out.
            jbosch Jim Bosch added a comment -

            I'm actually going to close this as Won't Fix: since this ticket was created, I've come to see aperture correction as more linked to PSF modeling than I had, and I think using PSF stars for aperture correction measurement is probably the most reasonable thing we could be doing.  If that changes, it'd be because of a specific problem we encounter with doing that, rather than a general sense that it's messy.

            jbosch Jim Bosch added a comment - I'm actually going to close this as Won't Fix: since this ticket was created, I've come to see aperture correction as more linked to PSF modeling than I had, and I think using PSF stars for aperture correction measurement is probably the most reasonable thing we could be doing.  If that changes, it'd be because of a specific problem we encounter with doing that, rather than a general sense that it's messy.

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              Unassigned Unassigned
              rowen Russell Owen
              Jim Bosch, John Parejko, John Swinbank, Russell Owen
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