GCN Circular 4000
Subject
Swift-BAT trigger 155764 is not a GRB
Date
2005-09-19T01:44:07Z (19 years ago)
From
Hans Krimm at NASA-GSFC <krimm@milkyway.gsfc.nasa.gov>
D. Grupe (PSU), S. Barthelmy (GSFC), D. Burrows (PSU),
N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD),
D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC)
After analysis of the full data set for Swift-BAT trigger 155764
at 19:42:13 UT on 18 Sep 2005 (Grupe et al, GCN 3999),
we have determined that this event is not due to a GRB or any
other astrophysical source. The trigger arose from a chance
coincidence between a rate increase due to noise and a
positive fluctuation in the image.
XRT observed the field of trigger 155764 for 2 orbits for a total
of 4.2 ks. Ground-based analysis showed no source in the field.
No further observations are planned.
[GCN OPS NOTE(18sep05): Per one of the author's request, the trigger number
was corrected in the second paragraph.]