NOTE: uvot_fluxes_wget.pl vrs. 2016-02-01 fem at 161010d23h02m51s253812usUT
NOTE: Used archived BAT position of 275.21780 -28.78670
NOTE: position reference is GCN_Notice

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

GRB 161010: 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 161010
12020 s after the INTEGRAL trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the INTEGRAL position
*** POSITION REFERENCE is GCN_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

white            13620        13899          274         >20.3
v                14100        20293          512         >18.8
u                12020        24299         2516         >20.4

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.54 in the direction of the burst
(Schlegel et al. 1998).