Eli Rykoff brought to my attention that the existing PhotoCalTask, Colorterm, and jointcal code regarding reference catalog filters are all inconsistent in their use of physical/band filter labels. The colorterm dicts and getCorrectedMagnitude code should be changed to explicitly use physicalLabel (colorterms are associated with piece of glass), while refcat loading should be clarified to be band (you want the refcat filter name that is like the band of your science data). Jointcal and PhotoCalTask will likely need to pass around filterLabels as necessary, which will require a bit of reworking of jointcal's data loading mechanism. Cleaning up the docs and variable/method names is part of this work.

As part of this, I will remove the now unnecessary filterMap (physical) and colortermDict (band) entries in obs_subaru and obs_cfht, to reduce confusion on this question.