NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200217d00h00m48s437954usUT
NOTE: Source region spec. is: 160.43467 19.47517 4"
NOTE: Used archived XRT position of 160.43467  19.47517  4.00
NOTE: position reference is GCN_Circulars-27106

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

GRB 200216B: Swift/UVOT Upper Limits

N. P. M. Kuin (UCL-MSSL) and P. D'Avanzo (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200216B
124 s after the BAT trigger (D'Avanzo et al., GCN Circ. 27102).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 27106)
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           124          274          147         >21.0
white              124         1535          314         >21.4
w1                 714         1635           78         >19.6

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).