[vsnet-grb-info 20693] GRB 180618A: Enhanced Swift-XRT position
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Mon Jun 18 12:26:46 JST 2018
TITLE: GCN CIRCULAR
NUMBER: 22791
SUBJECT: GRB 180618A: Enhanced Swift-XRT position
DATE: 18/06/18 03:26:07 GMT
FROM: Phil Evans at U of Leicester <pae9 at leicester.ac.uk>
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester)
report on behalf of the Swift-XRT team.
Using 1241 s of XRT Photon Counting mode data and 1 UVOT
images for GRB 180618A, 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 = 169.94141, +73.83731 which is equivalent
to:
RA (J2000): 11h 19m 45.94s
Dec (J2000): +73d 50' 14.3"
with an uncertainty of 1.7 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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