GCN Circular 26199
Subject
GRB 191106A: Swift/UVOT Upper Limits
Date
2019-11-07T14:14:44Z (4 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (U.Warwick) and F. E. Marshall (NASA/GSFC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 191106A
132 s after the BAT trigger (Marshall et al., GCN Circ. 26177).
No optical afterglow consistent with the XRT position
(Page et al., GCN Circ. 26190) 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 4987 5137 147 >20.0
u_FC 132 381 246 >20.1
white 4987 6775 541 >21.0
v 437 7186 549 >19.9
b 387 12533 1264 >21.3
u 132 11621 1631 >20.8
w1 486 7510 464 >20.0
m2 461 7391 510 >20.0
w2 412 13245 1223 >20.6
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.06 in the direction of the burst
(Schlegel et al. 1998).