I have chosen data we already had of M31 on hand to use for this. We only had two broadbands (g and r) and one narrow band. I only processed the broadbands, so there is not much color information. We can revisit this again if this is important and select a different field with more filters. I chose visits within a seeing range of between 0.5-0.8.
I tried to follow the same procedure as in
DM-9168 for creating the coadds, but the psf-matched coadds looked really bad. So these data are not psf-matched. This means each filter produces its own psf file.
There are some very dense regions in this area. We again had problems when merging peaks, which isn't really relevant here. I chose some semi-random regions ranging from low to moderate density. We could find more examples of higher or lower density if desired.
Here are thumbnails for images.
All the output files can be found at http://tigress-web.princeton.edu/~rea3/m31_examples/examples.tar