WISE forced photometry: can we use priors to avoid cancellation?

legacysurvey / legacypipe

Image reduction pipeline for the DESI Legacy Imaging Surveys, using the Tractor framework

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WISE forced photometry: can we use priors to avoid cancellation? #707

Open dstndstn opened 2 years ago

dstndstn commented 2 years ago

Mara reported many W4 sources with very significant fluxes, but these turn out to have nearby large negative neighbours that fully cancel them out, even in cases of blank sky. Could a prior that pushes the solution toward zero flux help?