[vsnet-grb-info 15988] GRB 150103A: Prompt enhanced Swift-XRT position

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17270
SUBJECT: GRB 150103A: Prompt enhanced Swift-XRT position
DATE:    15/01/03 20:37:39 GMT
FROM:    Phil Evans at U of Leicester  <pae9 at leicester.ac.uk>

P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:

Using  promptly downlinked XRT event data for GRB 150103A, we find an
enhanced XRT position of the afterglow: RA, Dec: 131.6663, -48.8863
which is equivalent to:
   RA (J2000)  = 08 46 39.92
   Dec (J2000) = -48 53 10.6
with an uncertainty of 2.0 arcseconds (radius, 90% confidence).
Analysis of the promptly available data is online at
http://www.swift.ac.uk/sper/623368.

Position enhancement is 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.