NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 191102d18h30m03s779055usUT
NOTE: Source region spec. is: 251.83725 43.74097 4"
NOTE: Used archived XRT position of 251.83725  43.74097  4.00
NOTE: position reference is GCN_Circulars-26140

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

GRB 191101A: Swift/UVOT Upper Limits

S. J. LaPorte (PSU) and A. D'Ai (INAF-IASFPA)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 191101A
110 s after the BAT trigger (D'Ai et al., GCN Circ. 26135).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 26140)
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           110          259          147         >21.1
u_FC               268          517          246         >20.3
white              110         7300          785         >21.9
v                  597        12392         1192         >20.4
b                  523        18806         1144         >21.5
u                  268        24541         2344         >21.9
w1                 646        23793         2262         >21.3
m2                 622        22886         2045         >21.3
w2                 573        11479         1228         >21.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).