NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 251119d07h54m28s676945usUT
NOTE: Source region spec. is: 160.083 -34.576 3"
NOTE: Used archived BAT position of 160.08300 -34.57600
NOTE: position reference is GCN_FOM_Notice

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

GRB 251118: Swift/UVOT Upper Limits

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

The Swift/UVOT began settled observations of the field of GRB 251118
31326 s after the LAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the LAT position
*** POSITION REFERENCE is GCN_FOM_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         31484        31614          128         >19.8
white            31484        31614          128         >19.8
v                31641        31734           91         >18.1
u                31326        31478          149         >18.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.066 in the direction of the burst
(Schlegel et al. 1998).