NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 231215d00h37m25s536153usUT
NOTE: Source region spec. is: 305.69067 -72.43242 4"
NOTE: Used archived XRT position of 305.69067 -72.43242  4.00
NOTE: position reference is GRB_Auto_Processing

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

GRB 231214A: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and Brivio (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 231214A
442 s after the BAT trigger (Brivio et al., GCN Circ. 35335).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GRB_Auto_Processing ***
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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white              442         4733          382         >20.9
v                 4944         4998           54         >18.1
b                 4329         4528          197         >19.7
u                 4123         4322          197         >19.3
w2                4739         4939          197         >20.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.060 in the direction of the burst
(Schlegel et al. 1998).