GCN Circular 17180
Subject
GRB 141212A: Swift/UVOT Upper Limits
Date
2014-12-13T10:59:10Z (9 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (IAA-CSIC/UCL-MSSL) and T. N. Ukwatta (LANL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 141212A
72 s after the BAT trigger (Ukwatta et al., GCN Circ. 17158).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 17164)
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 72 222 147 >20.6
u_FC 286 535 246 >19.9
white 72 1531 392 >21.2
v 615 1581 117 >18.8
b 541 1681 117 >19.8
u 286 1655 343 >20.1
w1 664 1631 117 >19.3
w2 591 1210 39 >18.6
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).