Back

GCN Circular 32077

Subject

GRB 220521A: Prompt enhanced Swift-XRT position

Date

2022-05-21T23:44:42Z (3 years ago)

From

Phil Evans at U of Leicester <pae9@leicester.ac.uk>

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

Using  promptly downlinked XRT event data for GRB 220521A, we find an
enhanced XRT position of the afterglow: RA, Dec: 275.22978, 10.37221
which is equivalent to:
   RA (J2000)  = 18 20 55.15
   Dec (J2000) = +10 22 19.9
with an uncertainty of 1.9 arcseconds (radius, 90% confidence).
Analysis of the promptly available data is online at
http://www.swift.ac.uk/sper/1107466.

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.