GCN Circular 16324
Subject
GRB 140523A: possible X-ray afterglow candidate from tiled Swift/XRT observations
Event
Date
2014-05-24T07:51:23Z (12 years ago)
From
Valerio D'Elia at ASDC <delia@asdc.asi.it>
V. D'Elia (ASDC) and L. Izzo (URoma/ICRA) report on behalf of the
Swift/XRT Team:
Swift began a series of observations, tiled on the sky, of the
Fermi/GBM and /LAT GRB 140523A (von Kienlin et al. GCN 16321, Vianello
et al. GCB 16322).
Observations cover four contiguous fields, starting on May 23 at 18:34
UT, i.e., 15.5 h after the GBM detection. Each field was observed for
about 2 ks.
A possible XRT candidate counterpart for the GBM/LAT source is
detected at Ra, Dec 133.111250, +24.957111, which is equivalent to:
Ra(J2000) = 08h 52m 26.7s
Dec(J2000) = +24d 57' 25.6"
with an uncertainty of 6.4" (S/N~3). This location is 10.3 arcmins
from the LAT position, within the LAT error box.
No statement about fading can be made at this stage.
We note the presence of a SDSS galaxy (r=22.27) a few arcsec SW to the
center of the XRT detection, consistent with the X-ray position.