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zphot.zeropoint

While iterative adjustment of photometric zeropoints is not supported in the current version of EAZY you can specify a separate file that will apply zeropoint offsets to the flux and error columns in the the CATALOG_FILE. For example, if you want to multiply the flux and error of filter $j$ by a factor of 1.03 or apply a magnitude offset of +0.07 mag to filter $k$, you could make a zphot.zeropoint file like the following:

Fj 1.03
Mk 0.07

noting the "F" and "M" as needed for flux or mag offsets and where $j, k$ are the appropriate filter ID numbers from the FILTERS_RES file.



G.B.B 2008-05-14