[vsnet-grb-info 18543] GRB 161004B: Enhanced Swift-XRT position
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Wed Oct 5 20:56:40 JST 2016
TITLE: GCN CIRCULAR
NUMBER: 19991
SUBJECT: GRB 161004B: Enhanced Swift-XRT position
DATE: 16/10/05 11:55:09 GMT
FROM: Phil Evans at U of Leicester <pae9 at leicester.ac.uk>
P.A. Evans, M.R. Goad, J.P. Osborne and A.P. Beardmore (U. Leicester)
report on behalf of the Swift-XRT team.
Using 3535 s of XRT Photon Counting mode data and 5 UVOT
images for GRB 161004B, we find an astrometrically corrected X-ray
position (using the XRT-UVOT alignment and matching UVOT field sources
to the USNO-B1 catalogue): RA, Dec = 112.15126, -39.89791 which is equivalent
to:
RA (J2000): 07h 28m 36.30s
Dec (J2000): -39d 53' 52.5"
with an uncertainty of 1.4 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest
position can be viewed at http://www.swift.ac.uk/xrt_positions. Position
enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans
et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the
Swift-XRT team.
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