GCN Circular 18984
Subject
GRB 160203A: Swift/UVOT Detection
Date
2016-02-03T12:50:43Z (8 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and P. D'Avanzo (INAF-OAB) report on behalf of
the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160203A
151 s after the BAT trigger (D'Avanzo et al., GCN Circ. 18979).
A fading source consistent with the optical position (Kruehler et al.
GCN Circ. 18980) is detected in the initial UVOT exposures in the white
filter.
Preliminary detections and 3-sigma upper limits 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
white_FC 151 301 147 20.56 �� 0.3
white 10022 10928 885 21.9 �� 0.3
b 4946 5146 197 >20.7
u 309 472 160 >19.5
v 5562 5762 197 >19.7
uvw1 5972 6171 197 >19.7
uvm2 5766 5966 197 >19.6
uvw2 5357 5557 197 >19.9
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.07 in the direction of the
burst (Schlegel et al. 1998).