GCN Circular 7634
Subject
Swift-BAT trigger 309665 is not a GRB
Date
2008-04-20T13:32:43Z (17 years ago)
From
Hans Krimm at NASA-GSFC <hans.a.krimm@nasa.gov>
H.A. Krimm (CRESST/GSFC/USRA) and L. Vetere (PSU) report on behalf of
the Swift Team:
The Swift-BAT trigger (trigger=309665) at 04:12:47 UT on 20 April 2008,
tentatively labelled GRB 080420 (GCN 7632, Vetere et al.),
is not due to a GRB or any other astrophysical source. This trigger
is due to a cosmic ray shower event in the instrument. All events
occurred in the same 100 microsec window.