We have a hacky approach for dealing with one bright star artifact in Mosaic here
https://github.com/legacysurvey/legacypipe/pull/633
adding a few exposures to the bad_expid file in order to allow images on the other passes to "outvote" this artifact in the outlier rejection. These exposures are otherwise fine. If we came up with better bright star masking procedures we could remove these exposures from the bad_expid list.
We have a hacky approach for dealing with one bright star artifact in Mosaic here https://github.com/legacysurvey/legacypipe/pull/633 adding a few exposures to the bad_expid file in order to allow images on the other passes to "outvote" this artifact in the outlier rejection. These exposures are otherwise fine. If we came up with better bright star masking procedures we could remove these exposures from the bad_expid list.
More details in: [decam-chatter 13589] Bright star reflection from red star in mosaic https://desi.lbl.gov/mailman/private/decam-chatter/2020-August/013588.html