Hi!
In the Merian survey, we have been processing DECam data with the LSST pipe. We had a run around 2023ish for DR1, and we are running DR2 with the latest weekly. We find that the current pipeline adds large saturation masks at places where there are no obvious saturation patterns. Here is one example:
Left is the old run, and right is the new run. The large red patch on the right is the new saturation mask. The input raw data is the same between the two runs.
Do we understand why this is the case? It seems implausible that we could have such a big saturation region that doesn’t show up in the raw image. Thanks!
