[vsnet-grb-info 13084] GRB 130420B: Enhanced Swift-XRT position
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sun Apr 21 04:47:42 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 14421
SUBJECT: GRB 130420B: Enhanced Swift-XRT position
DATE: 13/04/20 19:47:34 GMT
FROM: Kim Page at U.of Leicester <klp5 at leicester.ac.uk>
K.L. Page, P.A. Evans and M.R. Goad (U. Leicester) report
on behalf of the Swift-XRT team:
Using 1436 s of XRT Photon Counting mode data and 3 UVOT images, 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 =
183.12805, 54.39054 which is equivalent to:
RA (J2000): 12 12 30.73
Dec (J2000): +54 23 25.9
with an uncertainty of 2.0 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 is an official product of the Swift-XRT team.
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