NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210410d23h33m54s737532usUT
NOTE: Source region spec. is: 269.754 +45.363 3"
NOTE: Used archived BAT position of 269.75400  45.36300
NOTE: position reference is GCN_FOM_Notice
WARNING: t_start for light curve (2972) and t_start from the exposure report (0) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 210410: 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 210410
***???*** s after the BAT trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the BAT position
*** POSITION REFERENCE is GCN_FOM_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 initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

b                 3590         3676          182         >19.8
u                 3384         3583          648         >20.2
w1                3179         3378          255         >19.5
m2                2972         3171          216         >19.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.050 in the direction of the burst
(Schlegel et al. 1998).