GCN Circular 19897
Subject
GRB 160905A: Swift/UVOT Detection
Date
2016-09-06T10:55:43Z (8 years ago)
From
Sam Emery at MSSL-UCL <samuel.emery.15@ucl.ac.uk>
S.W.K. Emery (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 160905A
67 s after the BAT trigger (D'Avanzo et al., GCN Circ. 19887), which was
also detected by Fermi-GBM (GCN 19889) and Fermi-LAT (GCN 19890).
A fading source consistent with the XRT position
(Osborne et al. GCN Circ. 19891) is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 67 216 147 15.8 � 0.03
white 67 2234 469 17.1 � 0.05
u_FC 280 530 246 18.3 � 0.15
u 280 2185 401 18.8 � 0.16
v 610 2285 195 17.4 � 0.12
b 536 2210 175 18.7 � 0.16
w1 660 2160 175 >19.1
m2 635 2296 162 >19.1
w2 586 2260 195 >19.4
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.45 in the direction of the burst
(Schlegel et al. 1998).