NOTE: uvot_fluxes_wget.pl vrs. 2016-02-01 fem at 170223d05h26m22s356763usUT
NOTE: Used archived BAT position of 292.95600  28.21100
NOTE: position reference is GCN_Circ-20722

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

GRB 170222A: 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 170222A
33738 s after the IPN trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the IPN position
*** POSITION REFERENCE is GCN_Circ-20722 ***
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

m2               33738        38892         1759         >20.5

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.456 in the direction of the burst
(Schlegel et al. 1998).