[vsnet-grb-info 2161] Swift-BAT trigger 155764 is not a GRB

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4000
SUBJECT: Swift-BAT trigger 155764 is not a GRB
DATE:    05/09/19 01:44:07 GMT
FROM:    Hans Krimm at NASA-GSFC  <krimm at 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 155264 for 2 orbits for a total
of 4.2 ks. Ground-based analysis showed no source in the field.
No further observations are planned.