I’m excited to see the excellent DP1 release and its detailed draft documentation. I see that DP1 reports ~2.3 million distinct astrophysical objects and uses the Monster catalog for astrometric and photometric calibration.
As an amateur, I’ll be bold and ask whether there is an estimate of how many of the detected objects were previously detected in other surveys (e.g., Pan-STARRS, DES, HSC) versus how many are “new” (not detected in any prior public survey catalogs)?
At a superficial level, I guess that someone might have counted the number of monster catalog entries in the areas that were observed for DP1. Is that available anywhere?
Next, I guess one could do a cross-match analysis at the level of individual objects.
Has that been done? Is it planned for future data previews or DR1, or is that left up to the science collaborations and/or individuals?
Many thanks!