Color Terms

[emirkmo]

We need to add in color terms post photometry to calculate natural system photometry. This means keeping track of the color terms used for each image in some way. The simplest is to of course append the color terms to the eventual file header.

This also means obtaining color terms for each instrument in the flows pipeline and keeping those updated and ensuring that the right color terms go with the right images, given that color terms change with time for most instruments. That's a significant burden and we need to discuss how to make it feasible.

[emirkmo]

[Issue moved from old repo. Originally posted by @lgalbany ]

As discussed on Nov 4th in Barcelona, it would be good to have already included in the pipeline the transformation between the catalogued 2MASS stars catalogs to the system of each of the telescopes, so then the SN gets calibrated directly in the natural system of the telescope.

This basically means that color terms are included and J/H magnitudes form 2MASS are transformed to CAHA/NOT/NTT/CMO/... before being used to calibrate the SN.