List of skymaps and preferred skymap
Created on June 28, 2018. Copied from redmine (https://bugs.ligo.org/redmine/issues/6177)
There was some discussion at the DASWG face-to-face about having a list of skymaps and a preferred skymap for superevents. Not sure if this is going to be pursued or not, so just creating this issue to track it.
We would probably have to create a skymap model and link it to the superevent like we have for events and superevents. Might need a special 'upload_skymap' function in gracedb-client, as well as a special endpoint in the API.