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  1. Data Management
  2. DM-2308

Improve hacks in PhotoCalTask for dealing with reference flux uncertainties

    Details

    • Type: Improvement
    • Status: To Do
    • Resolution: Unresolved
    • Fix Version/s: None
    • Component/s: meas_astrom
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      Description

      In reviewing DM-1576 Jim Bosch commented on two existing ugly hacks in PhotoCalTask for dealing with uncertainties in reference object flux:

      • The reference flux is not handled in a principled way
      • The square root of the flux is used as the estimated error if the reference flux error is not known

      For now I have modified the code to ignore reference flux error. I will note, however, that any catalog that is suitable to be used for accurate photometric calibration ought to have known flux errors. So I am not convinced that the ugly hack of using sqrt(flux) is a very serious issue. Still, it might be smarter to ignore the reference flux error if it is unknown? For now I will ignore it in any case.

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              • Assignee:
                Unassigned
                Reporter:
                rowen Russell Owen
                Watchers:
                Dominique Boutigny, Jim Bosch, John Parejko, Robert Lupton, Russell Owen
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                • Created:
                  Updated:

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