Zeropoints of Deep Coadd Images

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#1

Is it possible to get the zeropoint of a deep coadd image?

I have generated image cutouts of a range of sources in all photometric bands (using SIA), but the zeropoints are not present in the FITS file header.

I have seen in the documentation that it is is possible to get the zeropoint of a single visit image using the CcdVisist table, but can’t find any information of whether this is available for a deep coadd image?

#2

If you’ve loaded your deep coadd image into Python, you should be able to query the attached photometric calibration information for the zero point. E.g.:

zero_point = deep_coadd.photoCalib.instFluxToMagnitude(1)
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