Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 23270

GRB 180925A: Prompt enhanced Swift-XRT position
2018-09-25T15:22:50Z (6 years ago)
Phil Evans at U of Leicester <>
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:

Using  promptly downlinked XRT event data for GRB 180925A, we find an
enhanced XRT position of the afterglow: RA, Dec: 315.2038, -64.4569
which is equivalent to:
   RA (J2000)  = 21 00 48.92
   Dec (J2000) = -64 27 24.9
with an uncertainty of 2.1 arcseconds (radius, 90% confidence).
Analysis of the promptly available data is online at

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.
Looking for U.S. government information and services? Visit