Add criteria for when to add co-detections for external pipelines

Currently we include every external event that is in a superevent, but in https://gracedb.ligo.org/superevents/S250223dk/view/ we had a Fermi event that was clearly vetoed by NOT_GRB and was manually removed by hand. We should apply either the following conditions:

1. Only include external events that are not vetoed (no NOT_GRB label) or
2. Only include external events that pass the public alert threshold (have RAVEN_ALERT).

I think the first solution is correct, but need to think on this more.

changed milestone to %Version 1.3.0

added EM_COINC O4 labels

assigned to @brandon.piotrzkowski

There would be superevents which would pass the EM_COINC label and not meet our OPA thresholds. For those superevents, having these externals events in GraceDB would be important to not cause any confusion. I too believe that the first solution is correct.

I think the goal is to find a criteria for extra external events to be included. The assumption is that the superevent and at least one external event as RAVEN_ALERT, but we want to think about additional external detections. In the future (i.e. O5) we will have a better solution, moving to include all of these in alerts.

Also (maybe the goal of the issue was misunderstood) this issue won't affect what is in the superevent but what appears in the public facing circular, which we should should have greater scrutiny for.

mentioned in merge request !196 (merged)

closed with merge request !196 (merged)