I was probably the author that introduced the
refCols fields many years ago, and I have to look up the code every time I want to muddle with them. They have something to do with what columns from the registry to look at when finding calibrations. I regret not having documented them, but those were wild early days when it was written, and the code has been due for replacement for a long time. Fortunately, as KT says, the end is truly and finally nigh. I have held off of updating the PFS pipeline for a long time, waiting until Gen3 is actually being used regularly in production operations, and I think that point has been reached. PFS will upgrade to the next stable+supported LSST release that includes the current level of Gen3 functionality. If I was writing a pipeline now, I would start off with Gen3 and completely ignore Gen2.