GCN Circular 18529
Subject
GRB 151027B: Swift UVOT detection
Event
Date
2015-10-29T15:34:43Z (10 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and T. N. Ukwatta (LANL) report on behalf of
the Swift/UVOT team:
In Swift/UVOT followup observations of GRB 151027B (Ukwatta et al., GCN
Circ. 18499) a source is found in the summed up V filter exposures at a
position consistent with the XRT (Osborne et al., GCN Circ. 18504) and
the optical/NIR counterparts reported by Malesani et al. GCN Circ.
18501, Xu et al. GCN Circ. 18505, Wiseman and Greiner GCN Circ. 18507,
Buckley et al. GCN Circ. 18511, Watson et al. GCN Circ. 18512, and
Dichiara et al. GCN Circ. 18520.
A preliminary detection using the UVOT photometric system (Breeveld et
al. 2011, AIP Conf. Proc. 1358, 373) for V data taken in the first and
second segment is:
Filter T_start(s) T_stop(s) Exp(s) Mag
v 191 28529 1986 20.8 �� 0.3
The magnitudes in the table are not corrected for the strong Galactic
extinction due to the reddening of E(B-V) = 0.25 in the direction of the
burst (Schlegel et al. 1998).