GCN Circular 38961
Subject
GRB 250114B: Swift-XRT afterglow detection
Date
2025-01-16T14:28:12Z (6 days ago)
From
Phil Evans at U of Leicester <pae9@star.le.ac.uk>
Via
email
M. A. Williams (PSU), S. Dichiara (PSU), J.A. Kennea (PSU), J.P.
Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U.
Leicester), M. Perri (SSDC & INAF-OAR), V. D'Elia (SSDC & INAF-OAR), B.
Sbarufatti (INAF-OAB) and P.A. Evans (U. Leicester) reports on behalf
of the Swift-XRT team:
Swift-XRT has conducted further observations of the field of the
INTEGRAL-detected burst GRB 250114B. The observations now extend from
T0+11.4 ks to T0+153.7 ks and have a total exposure time of 9.8 ks. .
The source previously reported, "Source 2", is believed to be the
afterglow. The position of this source is RA, Dec=48.8582, -2.2940
which is equivalent to:
RA (J2000): 03:15:25.96
Dec(J2000): -02:17:38.2
with an uncertainty of 7.6 arcsec (radius, 90% confidence). This
position is 81 arcsec from the INTEGRAL position and consistent with
the reported optical counterpart (Sasada et al. GCN 38950). Comparison
of individual observations show the source has faded.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00021756.
The results of the full analysis of the XRT observations are available
at https://www.swift.ac.uk/ToO_GRBs/00021756.
This circular is an official product of the Swift-XRT team.