Successful Jenkins run: https://ci.lsst.codes/blue/organizations/jenkins/stack-os-matrix/detail/stack-os-matrix/36103/pipeline

OK, There was some problems with the Task conventions which I'm sure you just copied and pasted from other tasks in analysis_drp.

The major problem is that it reads in the entire `objectTable_tract` matches it to the reference catalog and then writes out the entire thing with the refcatalog columns appended.

Since we use reference catalogs for calibrating astrometry and photometry we are only ever going to want to read in directly comparable coord or psf/calib flux columns. How about for now, you just read in the columns that YOUR plots need. e.g.: ['coord_ra', 'coord_decl', 'iRa', 'iDecl', 'iRaErr' 'iDeclErr'] and others can add as needed. What would be really cool is if it could KNOW which columns are needed from the downstream plotting tasks that use it. I bet that's possible somehow! paging Nate Lust to put it on his radar in the future...

Ok, that sounds workable. A bit more is required, since we at least need the columns that are commonly used in the dataSelectors functions, but that is still a lot fewer than ALL columns.

This is mergeable but needs a clean up ticket. I'll do another review round with the intention of making a todo-list for that ticket

Ok, looking at this again in the light of day I would change how I grabbed the columns to use, but some guidance for other stuff would be helpful.

New Jenkins run with ci_imsim and ci_hsc: https://ci.lsst.codes/blue/organizations/jenkins/stack-os-matrix/detail/stack-os-matrix/36472/pipeline/