[vsnet-grb-info 18505] GRB 160927A: Prompt enhanced Swift-XRT position

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19953
SUBJECT: GRB 160927A: Prompt enhanced Swift-XRT position
DATE:    16/09/27 18:33:51 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 160927A, we find an
enhanced XRT position of the afterglow: RA, Dec: 256.2427, 17.3316
which is equivalent to:
   RA (J2000)  = 17 04 58.24
   Dec (J2000) = +17 19 53.7
with an uncertainty of 2.1 arcseconds (radius, 90% confidence).
Analysis of the promptly available data is online at
http://www.swift.ac.uk/sper/713782.

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.