GCN Circular 21896
Subject
Swift trigger 773082 is probably not astrophysical
Date
2017-09-18T20:59:42Z (7 years ago)
From
Kim Page at U.of Leicester <klp5@leicester.ac.uk>
H. A. Krimm (NSF/USRA), K. L. Page (U Leicester),
M. Stamatikos (OSU/NASA/GSFC) and A. Tohuvavohu (PSU) report on behalf
of the Swift Team:
At 20:27:32 UT, the Swift Burst Alert Telescope (BAT) triggered and
located trigger 773082. Swift will not slew to the location.
The BAT on-board calculated location is
RA, Dec 237.018, -45.634 which is
RA(J2000) = 15h 48m 04s
Dec(J2000) = -45d 38' 01"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). This location is marginally consistent with the position
of the X-ray binary IGR J15479-4529. As is common with an image trigger, the BAT
light curve does not show any significant structure.
Due to the marginal significance of the BAT detection (6.2 sigma),
the lack of a rate trigger and the distance to the putative source
(9.5 arcmin), we believe that this is merely a statistical fluctuation
not an astrophysical source.