NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 220708d20h01m48s136337usUT
NOTE: Source region spec. is: 248.5790 36.3478 4"
NOTE: Used archived XRT position of 248.57900  36.34780  4.00
NOTE: position reference is GCN_Circulars-32350

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

GRB 220708B: 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 220708B
35059 s after the CALET/GUANO trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 32350)
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            35059        54237         4805         >23.1

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.017 in the direction of the burst
(Schlegel et al. 1998).