TITLE: GCN CIRCULAR NUMBER: 30749 SUBJECT: GRB 210901A: Enhanced Swift-XRT position DATE: 21/09/01 20:08:20 GMT FROM: Phil Evans at U of Leicester pae9@leicester.ac.uk
J.P. Osborne, A.P. Beardmore, P.A. Evans and M.R. Goad (U. Leicester) report on behalf of the Swift-XRT team.
Using 302 s of XRT Photon Counting mode data and 1 UVOT images for GRB 210901A, 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 = 295.27805, -76.92664 which is equivalent to:
RA (J2000): 19h 41m 6.73s Dec (J2000): -76d 55' 35.9"
with an uncertainty of 2.5 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.