Details
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Type:
Improvement
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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: afw
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Labels:None
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Story Points:4
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Team:Data Release Production
Description
Coadds have a Psf class that returns the proper sum of input PSFs at a point. We need the same functionality for the Calib object associated with the Coadd Exposure.
This will require making a Calib a baseclass (it currently doesn't have a virtual dtor (although it does have virtual protected members))
Attachments
Activity
`Calib` was replaced with `PhotoCalib` several years ago. If we do want similar functionality for `PhotoCalib`, we should probably write an entirely new ticket for it.
See also RFC-545, where I advocate to just calibrate all images to nJy, and have the coadd be in nJy as well.
Calling this Won't Fix as I don't think we need it at all; our coadds are already calibrated to a common zero point (and while the target should be expressed in units of nJy rather than a magnitude zero point, that doesn't matter here). And getting more to what I suspect was the point of this ticket, we've decided that the PhotoCalib is only responsible for the overall/grey calibration - sub-band chromatic photometric corrections are the responsibility of the TransmissionCurve or some future extension thereof, and that already has a coadd implementation.
Jim Bosch is this 8-year-old ticket still relevant?