NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200208d01h43m45s929531usUT
NOTE: Source region spec. is: 163.623 -49.581 3"
NOTE: Used archived BAT position of 163.62300 -49.58100
NOTE: position reference is GCN_Position_Notice

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

GRB 200207: Swift/UVOT Upper Limits

A. Belles (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200207
1628 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          1628         1778          147         >20.5
white             1628         6199          396         >21.0
v                 1912         2280           58         >18.4
b                 1836         6000          255         >20.2
u                 1811         5795          255         >19.9
w1                1786         2320           69         >18.6
m2                1937         2131           39         >18.2
w2                1887         2256           58         >18.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.38 in the direction of the burst
(Schlegel et al. 1998).