GCN Circular 18597
Subject
GRB 151112A: Swift/UVOT Upper Limits
Date
2015-11-13T11:13:43Z (9 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (IAA-CSIC/UCL-MSSL) and D. Malesani (DARK/NBI)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 151112A
3144 s after the BAT trigger (Malesani et al., GCN Circ. 18588).
No optical afterglow, consistent with the enhanced XRT position
(Osborne et al. GCN Circ. 18592) and the GROND position
(Knust et al., GCN Circ. 18595), 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 3144 3294 147 >21.3
white 3144 4527 344 >21.8
v 3301 4938 393 >20.2
b 4123 10985 349 >21.1
u 3917 10825 1082 >21.5
w1 3711 9912 1169 >21.4
m2 3506 15760 1240 >21.3
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).