GCN Circular 18017
Subject
GRB 150711A: Swift/UVOT Upper Limits
Date
2015-07-12T09:05:59Z (9 years ago)
From
Paul Kuin at MSSL <npkuin@gmail.com>
N. P. M. Kuin (UCL-MSSL) and M. G. Bernardini (INAF-OAB) report
on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150711A
117 s after the BAT trigger (Bernardini et al., GCN Circ. 18011).
No optical afterglow consistent with the XRT position (Osborne et al.
GCN Circ. 18012) 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 117 267 147 >21.4
u_FC 330 580 246 >20.2
white 117 909 235 >21.9
v 660 852 39 >19.0
b 585 778 39 >19.9
u 330 753 265 >20.2
w1 709 729 19 >18.8
m2 684 704 19 >18.9
w2 636 828 39 >18.8
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).