Added an example output PDF created by Lauren showcasing the use of this ticket in processing RC2 data. Histograms on page 1 show the recovered distributions of sky source fluxes within various aperture sizes, as indicated by the inset legend. A total of 5 visits are shown here (one for each passband). The second page is an equivalent run on DC2 data, for reference.

Thank you Jim. There are 3 PRs associated with this ticket. Looking forward to hearing your comments.

Also note that the color-coding of the focal plane panel is now based on “metric” measurement per ccd, where here the metric is mean aperture flux of sky sources per ccd.

My only comment is on the pipe_tasks PR, but it's a bit of a structural code - I think we need to move the implementation to one place or the other, rather than leaving it split up the way it is.

Thanks Jim. Lauren and I have moved the column addition logic into pipe_tasks, and removed the equivalent from meas_algorithms. Sky sources are now fully implemented in one place as you suggest. I hope that looks okay.

I've added some example plots showing the placement of sky sources on 5 random visits (one per filter). All CCDs successfully placed 100 sky sources. These plots show CCD 42, with the background calexp images binned into 16-pixel blocks.

Thanks again Jim. Branches merged and deleted.

I've added a community post highlighting this change here: https://community.lsst.org/t/sky-sources-added-to-single-frame-processing/4137