GCN Circular 31147
Subject
GRB 211129A: Swift/UVOT Upper Limits
Date
2021-11-29T23:54:11Z (2 years ago)
From
Alexander Belles at PSU/Swift <aub1461@psu.edu>
A. Belles (PSU) and J. D. Gropp (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 211129A
84 s after the BAT trigger (Gropp et al., GCN Circ. 31136).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 31139)
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 84 234 147 >20.7
u_FC 297 547 246 >20.4
white 84 769 186 >20.9
v 626 818 39 >18.8
b 552 744 39 >19.6
u 297 719 265 >20.5
w1 675 695 19 >19.6
m2 651 831 28 >19.2
w2 602 794 39 >20.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.081 in the direction of the burst
(Schlegel et al. 1998).