NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 181119d04h06m09s992118usUT
NOTE: Source region spec. is: 299.270 -15.665 3"
NOTE: Used archived BAT position of 299.27000 -15.66500
NOTE: position reference is GCN_Position_Notice

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

GRB 181118: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 181118
1074 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          1074         1224          147         >20.0
white             1074         5721          339         >20.4
v                 1231         1597           58         >17.9
b                 1330         5560          236         >19.6
u                 1305         5355          236         >19.2
w1                1281        11654          498         >19.5
m2                1255        11381         1102         >20.4
w2                1380         7336          146         >19.3

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.16 in the direction of the burst
(Schlegel et al. 1998).