NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220402d11h27m20s020997usUT
NOTE: Source region spec. is: 30.692 -61.376 3"
NOTE: Used archived BAT position of  30.69200 -61.37600
NOTE: position reference is GCN_Position_Notice
WARNING: Did not recognize UBS name.

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

GRB 220402: Swift/UVOT Upper Limits

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

The Swift/UVOT began settled observations of the field of GRB 220402
107 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           107          257          147         >20.3
u_FC               319          569          246         >19.6
white              107         1718          410         >21.0
v                  649         1768          136         >18.8
b                  574         1693          117         >19.6
u                  319         1837          339         >19.8
w1                 699         1817          117         >19.1
w2                 624          644           19         >18.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.035 in the direction of the burst
(Schlegel et al. 1998).