NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 251024d22h21m48s571099usUT
NOTE: Source region spec. is: 306.59783 -68.57239 4"
NOTE: Used archived XRT position of 306.59783 -68.57239  4.00
NOTE: position reference is GCN_Circulars-42430

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

GRB 251024A: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and M. J. Moss (GSFC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 251024A
132 s after the BAT trigger (Moss et al., GCN Circ. 42426).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Circulars-42430 ***
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           132          282          147         >21.0
u_FC               290          540          246         >19.9
white              132          591          167         >21.0
v                  622          641           19         >18.0
b                  547          567           20         >19.8
u                  290          540          246         >19.9
w2                 597          617           20         >19.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.044 in the direction of the burst
(Schlegel et al. 1998).