NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 211203d22h38m34s805145usUT
NOTE: Source region spec. is: 170.174 +16.256 3"
NOTE: Used archived BAT position of 170.17400  16.25600
NOTE: position reference is GCN_Position_Notice

=========== Draft Upper Limit Circular ========

GRB 211203A: Swift/UVOT Upper Limits

N. P. M. Kuin (UCL-MSSL) and P. A. Evans (U. Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 211203A
82 s after the BAT trigger (Evans et al., GCN Circ. 31160).
No optical afterglow consistent with the BAT position
*** POSITION REFERENCE is GCN_Position_Notice ***
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            82          232          147         >19.8
white               82          232          147         >19.8
u                  294          340           45         >18.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.023 in the direction of the burst
(Schlegel et al. 1998).