NOTE: uvot_fluxes_wget.pl vrs. 2024-08-27 fem at 250331d23h24m08s309747usUT
NOTE: Source region spec. is: 48.525 +62.306 3"
NOTE: Used archived BAT position of  48.52500  62.30600
NOTE: position reference is GCN_FOM_Notice

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

GRB ??????: 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 ??????
131716 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the BAT 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 initial exposures are:

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

white           131716       138056         1786         >21.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.386 in the direction of the burst
(Schlegel et al. 1998).