GCN Circular 17610
Subject
Swift Triggers 635788-635794 are probably not real.
Date
2015-03-22T09:12:12Z (10 years ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
P. A. Evans (U Leicester), N. P. M. Kuin (UCL-MSSL),
A. Y. Lien (GSFC/UMBC), C. J. Mountford (U Leicester) and
P. Romano (INAF-IASFPA) report on behalf of the Swift Team:
Between 08:10:02 UT and 09:03:38 UT Swift reported 5 triggers, all of
which were 64-s image triggers. Trigger 635788 which was identified
as possibly being on the known source GRS 1915+105 and the rest
(635789, 635790, 635792, 635794) on unknown sources. All of these
triggers occurred while the star trackers had lost lock. Prompt
images show that Swift was not stationary while taking these
observations. We believe therefore that these are spurious triggers
and are not astrophysical, however until we get the full ground
dataset we are unable to say this for certain.