NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 191026d01h28m57s983477usUT
NOTE: Source region spec. is: 320.755 -48.330 3"
NOTE: Used archived BAT position of 320.75500 -48.33000
NOTE: position reference is GCN_Position_Notice

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

GRB 191025: Swift/UVOT Upper Limits

A. A. Breeveld (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 191025
86 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            86          235          147         >20.0
u_FC               298          547          246         >19.7
white               86         2052          438         >20.9
v                  627         1939          156         >19.0
b                  726         2040          136         >19.9
u                  298         2015          363         >20.0
w1                 677         1990          156         >19.4
m2                1426         1445           19         >18.4
w2                1377         1397           19         >18.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).