Fig. B.1.
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Example of images affected by artifacts in our galaxy sample. Top panels: DESI Legacy images of NGC 5055. The z band image suffers from severe calibration problems, causing an underestimate of the flux. Bottom panels: NIR images of UGC 02487 from 2MASS. The H and the Ks bands show a variable sky background that can lead to errors in the derived flux.
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