the zero point magnitude or zero point flux

[Aina]

Hello,
I have recently used DESI dr9 data for research, can you tell me what the zero point magnitude or zero point flux is for each of the g, r and z bands respectively?
Thank you for your help.

[Dustin Lang]

Hello,

The catalog flux_g, flux_r, flux_z values are in units of "nanomaggies" -- a flux of 1.0 corresponds to an AB magnitude of 22.5 in each band.

cheers,

dustin

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