NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 231206d02h49m53s313217usUT
NOTE: Source region spec. is: 54.14875 27.14133 4"
NOTE: Used archived XRT position of  54.14875  27.14133  4.00
NOTE: position reference is GCN_Circulars-35275
WARNING: Did not recognize UBS name.

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

GRB 231205: Swift/UVOT Upper Limits

PSU (***INSTITUTION***) 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 231205
216 s after the BAT trigger (Evans et al., GCN Circ. 35269).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-35275 ***
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           237          387          147         >21.3
white              237          536          167         >21.3
v                  216          414           33         >18.6
b                  492          512           19         >19.6
u                  468          487           19         >18.2
w1                 443          463           19         >19.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.204 in the direction of the burst
(Schlegel et al. 1998).