NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 181223d00h13m49s618245usUT
NOTE: Source region spec. is: 131.375 -5.488 3"
NOTE: Used archived BAT position of 131.37500  -5.48800
NOTE: position reference is GCN_Position_Notice

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

GRB 181222: Swift/UVOT Upper Limits

N. P. M. Kuin (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 181222
147 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           147          297          147         >20.7
u_FC               306          556          246         >20.0
white              147         1183          353         >20.9
v                  636         1233           78         >18.2
b                  562         1159           58         >19.1
u                  306         1134          285         >20.0
w1                 686         1272           48         >18.4
m2                 661         1257           78         >18.9
w2                 612         1209           78         >19.1

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).