NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200816d14h15m20s259738usUT
NOTE: Source region spec. is: 202.461 -22.590 3"
NOTE: Used archived BAT position of 202.46100 -22.59000
NOTE: position reference is GCN_Position_Notice

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

GRB 200816: 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 200816
99 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            99          249          147         >20.2
u_FC               257          476          216         >19.5
white               99          249          147         >20.2
u                  257          476          216         >19.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.10 in the direction of the burst
(Schlegel et al. 1998).