NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220108d16h52m34s564218usUT
NOTE: Source region spec. is: 169.761 +34.139 3"
NOTE: Used archived BAT position of 169.76100  34.13900
NOTE: position reference is GCN_Circ-31402
WARNING: t_start for light curve (26716) and t_start from the exposure report (0) do not agree.
  Replace ??? in draft Circular with correct value.

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

GRB 220107A: Swift/UVOT Upper Limits

M. A. Baer (PSU) and S. L. Laha (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 220107A
***???*** s after the GUANO trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the GUANO position
*** POSITION REFERENCE is GCN_Circ-31402 ***
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

white            26716        39581         4789         >22.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.019 in the direction of the burst
(Schlegel et al. 1998).