GCN Circular 13449
Subject
GRB 120711B: Swift/UVOT Upper Limits
Event
Date
2012-07-11T21:56:05Z (14 years ago)
From
Alice Breeveld at MSSL-UCL <aab@mssl.ucl.ac.uk>
A. A. Breeveld (MSSL-UCL) and M. J. Page (MSSL-UCL) report on behalf of
the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120711B
260 s after the BAT trigger (Page et al., GCN Circ. 13431).
No optical afterglow consistent with the XRT position (Page et al., GCN
Circ. 13431) 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 260 410 147 >21.7
white 260 734 186 >21.8
v 417 784 58 >18.9
b 516 710 39 >19.8
u 491 858 58 >19.5
w1 466 833 58 >18.9
m2 441 809 58 >19.3
w2 566 6472 208 >20.2
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 1.13 in the direction of the
burst (Schlegel et al. 1998).