GCN Circular 15757
Subject
GRB 140110A: Second Follow-up Swift-XRT Observation
Date
2014-01-22T14:29:04Z (10 years ago)
From
Alessandro Maselli at INAF/IASF Palermo <maselli@ifc.inaf.it>
A. Maselli (INAF-IASFPA) and P. A. Evans (U. Leicester) report on behalf
of the Swift team:
Swift carried out a second follow-up observation to investigate the
behaviour of the X-ray source #2 reported by Maselli et al. (GCN 15721)
as a result of the analysis of tiled observations covering the LAT error
circle. This source, although outside the error box formed by the
intersection between the LAT error circle and the IPN annulus reported
by Pal'shin et al.(GCN 15725), suggested initially a possible fading
behaviour (Maselli et al., GCN 15721).
The new observation started on January 21, 928 ks after the LAT trigger,
and had an exposure of 6.3 ks. The source #2 has been detected with a
mean count rate of (1.24 � 0.16) x 10^-2 ct s^-1 which is consistent
with the one (1.23 � 0.27) x 10^-2 ct s^-1 corresponding to eleven days
earlier. Therefore, we exclude that it may be the afterglow of GRB 140110A.
The Swift-XRT tiled observations have covered the whole error box
reported by Pal'shin et al. (GCN 15725) and no credible counterpart for
the X-ray afterglow has been detected (see also Maselli et al., GCN 15747).
This circular is an official product of the Swift-XRT team.