TITLE: GCN CIRCULAR NUMBER: 40492 SUBJECT: GRB 250520A: Prompt enhanced Swift-XRT position DATE: 25/05/20 03:19:49 GMT FROM: Phil Evans at U of Leicester pae9@star.le.ac.uk
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Using 1.2 ks of promptly downlinked XRT event data for GRB 250520A, we find an enhanced XRT position of the afterglow: RA, Dec: 282.28613, -11.86896 which is equivalent to: RA (J2000) = 18 49 08.67 Dec (J2000) = -11 52 08.3 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/1315630.
Position enhancement 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.
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