GCN Circular 17008
Subject
GRB 141031A: Swift/UVOT Upper Limits
Date
2014-10-31T20:11:19Z (9 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (IAA-CSIC/UCL-MSSL) and B. P. Gompertz (U Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 141031A
102 s after the BAT trigger (Gompertz et al., GCN Circ. 16995).
No optical afterglow consistent with the possible optical position
(Tanga et al. GCN Circ. 16996) or enhanced XRT position
(Evans et al. GCN Circ. 16997) 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 102 252 147 >20.9
u_FC 315 565 246 >19.9
white 102 18038 967 >21.8
v 646 13448 759 >20.0
b 571 17791 1414 >21.4
u 315 23978 1180 >20.7
w1 696 23537 1396 >21.0
m2 670 6964 529 >20.2
w2 621 12030 1238 >21.0
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.17 in the direction of the burst
(Schlegel et al. 1998).