TITLE: GCN CIRCULAR NUMBER: 33382 SUBJECT: GRB 230228A: Enhanced Swift-XRT position DATE: 23/02/28 17:09:14 GMT FROM: Phil Evans at U of Leicester pae9@leicester.ac.uk
A.P. Beardmore, P.A. Evans, M.R. Goad and J.P. Osborne (U. Leicester) report on behalf of the Swift-XRT team.
Using 2720 s of XRT Photon Counting mode data and 3 UVOT images for GRB 230228A, 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 = 18.37812, +44.48293 which is equivalent to:
RA (J2000): 01h 13m 30.75s Dec (J2000): +44d 28' 58.5"
with an uncertainty of 2.1 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.