GCN Circular 14957
Subject
GRB 130701A: Swift/UVOT Detection
Date
2013-07-01T15:06:08Z (11 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (MSSL-UCL) and N. P. M. Kuin (UCL-MSSL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 130701A
with the u filter 151 s after the BAT trigger (Kuin et al., GCN Circ.
14953).
A source consistent with the enhanced XRT position (Beardmore et al.,
GCN Circ. 14955) and NOT position (Leloudas et al., GCN Circ. 14954) is
detected in the initial UVOT exposures. There is a faint USNO-B1 source
2.16" away (USNO-B1 1261-054544, with B2 mag of 21.10) which perhaps
could be the host galaxy for the GRB.
Preliminary detections using the UVOT photometric system (Breeveld et
al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u_FC 151 400 246 15.52 � 0.1
v 5950 6150 197 19.04 � 0.2
b 5538 5737 197 19.66 � 0.2
w2 5744 5944 197 20.07 � 0.4
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.09 in the direction of the
burst (Schlegel et al. 1998).