NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210825d18h23m17s834114usUT
NOTE: Source region spec. is: 238.78558 -54.06150 4"
NOTE: Used archived XRT position of 238.78558 -54.06150  4.00
NOTE: position reference is GRB_Auto_Processing

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

GRB 210825: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210825
85 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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 first
finding chart (FC) exposure and subsequent exposures are:

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

white_FC            85          235          147         >20.5
u_FC               298          548          246         >19.6
white               85         1550          392         >20.8
v                  628         5065          292         >18.9
b                  553         1525           97         >19.1
u                  298         1501          324         >19.8
w1                 679         1476           91         >19.3
m2                 653         5096          123         >19.6
w2                 604         1575          117         >20.1

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 22.066 in the direction of the burst
(Schlegel et al. 1998).