GCN Circular 34116
Subject
GRB 230628E: Enhanced Swift-XRT position (Correction to name in GCN 34115)
Date
2023-06-29T04:37:07Z (a year ago)
From
K.L. Page at U Leicester <klp5@leicester.ac.uk>
K.L. Page and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT
team:
GCN 34115 incorrectly referred to GRB 230628A; the enhanced position given
was instead for GRB 230628E. We repeat the details here, with the correct
name:
Using 3999 s of XRT Photon Counting mode data and 9 UVOT images for GRB
230628E, 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 = 171.84876, -11.46370 which is equivalent to:
RA (J2000): 11h 27m 23.70s
Dec (J2000): -11d 27' 49.3"
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 https://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 is an official product of the Swift-XRT team.