NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 230320d14h15m38s662300usUT
NOTE: Source region spec. is: 248.5015 -47.3926 4"
NOTE: Used archived XRT position of 248.50150 -47.39260  4.00
NOTE: position reference is GCN_Notice
WARNING: t_start for light curve (700992147) and t_start from the exposure report (0) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 230320: Swift/UVOT Upper Limits

***UBS*** (***INSTITUTION***) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 230320
***???*** s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_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     700992147    700992296          147         >20.4
white        700992147    700994308          373         >21.1
v            700992303    700994466          204         >18.7
b            700992402    700994284           78         >19.1
u            700992377    700999806          222         >19.1
w1           700992352    700999655          274         >19.7
m2           700992328    700999450          274         >20.0
w2           700992452    700994333           97         >19.2

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 20.618 in the direction of the burst
(Schlegel et al. 1998).