[vsnet-grb-info 21429] GRB 181213A: Swift-XRT observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Dec 13 23:10:30 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 23528
SUBJECT: GRB 181213A: Swift-XRT observations
DATE: 18/12/13 14:07:01 GMT
FROM: Phil Evans at U of Leicester <pae9 at leicester.ac.uk>
J.P. Osborne (U. Leicester), D.N. Burrows (PSU), J.A. Kennea (PSU), G.
Tagliaferri (INAF-OAB), S. Campana (INAF-OAB) and P.A. Evans (U.
Leicester) report on behalf of the Swift-XRT team:
The XRT began observing the field of GRB 181213A at 13:36:41.2 UT,
2342.8 seconds after the BAT trigger. Using promptly downlinked data we
find an uncatalogued X-ray source located at RA, Dec 248.27284,
78.49726 which is equivalent to:
RA(J2000) = 16h 33m 05.48s
Dec(J2000) = +78d 29' 50.1"
with an uncertainty of 3.8 arcseconds (radius, 90% containment). This
location is 53 arcseconds from the BAT onboard position, within the BAT
error circle. This position may be improved as more data are received;
the latest position is available at http://www.swift.ac.uk/sper. We
cannot determine whether the source is fading at the present time.
A power-law fit to a spectrum formed from promptly downlinked event
data gives a column density consistent with the Galactic value of 4.49
x 10^20 cm^-2 (Willingale et al. 2013).
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