NOTE: uvot_fluxes_wget.pl vrs. 2023-03-23 fem at 240725d09h20m53s836709usUT
NOTE: Source region spec. is: 299.054 -64.667 3"
NOTE: Used archived BAT position of 299.05400 -64.66700
NOTE: position reference is GCN_Position_Notice

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

GRB 240725: Swift/UVOT Upper Limits

N. P. M. Kuin (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 240725
91 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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            91          241          147         >20.7
u_FC               304          553          246         >20.0
white               91         5326          511         >21.2
v                  632         1605          110         >19.0
b                  559         1695          108         >19.9
u                  304         1678          343         >20.2
w1                 682         1654          117         >19.4
m2                 657         1280           78         >19.7
w2                 609         1581          117         >19.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.068 in the direction of the burst
(Schlegel et al. 1998).