NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 251127d13h59m08s751127usUT
NOTE: Source region spec. is: 99.94121 54.98589 4"
NOTE: Used archived XRT position of  99.94121  54.98589  4.00
NOTE: position reference is GCN_Circulars-42851

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

GRB 251126A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and Caputo (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 251126A
86 s after the BAT trigger (Caputo et al., GCN Circ. 42843).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-42851 ***
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            86          236          147         >21.1
u_FC               299          548          246         >20.1
white               86         1377          373         >21.5
v                  629         1427           97         >19.0
b                  554         1352           78         >19.6
u                  299         1327          304         >20.5
w1                 678         1467           88         >19.7
m2                 653         1451           58         >18.8
w2                 604         1402           97         >20.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.063 in the direction of the burst
(Schlegel et al. 1998).