NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 200325d04h05m56s833768usUT
NOTE: Source region spec. is: 222.67375 35.94172 4"
NOTE: Used archived XRT position of 222.67375  35.94172  4.00
NOTE: position reference is GCN_Circulars-27430
WARNING: t_start for light curve (215) and t_start from the exposure report (195) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 200324A: Swift/UVOT Upper Limits

A. A. Breeveld (UCL-MSSL) and S. Dichiara (NASA/GSFC/UMCP)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 200324A
***???*** s after the BAT trigger (Dichiara et al., GCN Circ. 27428).
No optical afterglow consistent with the XRT position
(Beardmore et al. GCN Circ. 27430)
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           215          365          147         >21.0
u_FC               374          624          246         >20.6
white              215         1376          373         >21.7
v                  704         1427           78         >18.9
b                  630         1527           97         >19.8
u                  374         1327          304         >20.2
w1                 754         1477           78         >19.1
w2                1381         1401           19         >19.1

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).