GCN Circular 4355
Subject
Swift Trigger 172767 is not a GRB
Date
2005-12-15T03:49:08Z (19 years ago)
From
Hans Krimm at NASA-GSFC <krimm@milkyway.gsfc.nasa.gov>
H. Krimm (GSFC/USRA), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC)
and C. Markwardt (GSFC/UMD) on behalf of the Swift-BAT team:
The Swift-BAT trigger (trigger=172767) at 00:39:49 UT on 15 Dec 2005
(reported in GCN Circular 4352, Holland et al.) is not due to a GRB
or any other astrophysical source. Using the full event-by-event data
from the recent telemetry downlink, all 42 events in the trigger occurred
within a single 100 microsec bin. This trigger was due to a cosmic
shower event in BAT.