[vsnet-grb-info 19836] Swift trigger 773082 is probably not astrophysical
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Sep 19 06:00:12 JST 2017
TITLE: GCN CIRCULAR
NUMBER: 21896
SUBJECT: Swift trigger 773082 is probably not astrophysical
DATE: 17/09/18 20:59:42 GMT
FROM: Kim Page at U.of Leicester <klp5 at 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.
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