WARNING: t_start for light curve (318735438) and t_start from the exposure report (26939) do not agree.
  Replace ??? in draft Circular with correct value.

GRB 110206: 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 110206
***???*** s after the BAT trigger (***BA*** et al., GCN Circ. ????).
No optical afterglow consistent with the INTEGRAL position
*** POSITION REFERENCE is GCN_FOM_Notice ***
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Poole et al. 2008, MNRAS, 383, 627) for the initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

b            318737259    318737751          481         >21.1
u            318736345    318743449         1045         >21.1
w1           318735438    318743281         1771         >20.9
m2           318741474    318742374          886         >20.7

The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.04 in the direction of the burst
(Schlegel et al. 1998).