GCN Circular 11936

T.A. Pritchard (PSU) and R. L. C. Starling (U Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 110414A
151 s after the BAT trigger (Starling et al., GCN Circ. 11931
Not found
 
 
).
No optical afterglow consistent with the XRT position
(Starling et al., GCN Circ. 11931
Not found
 
 
) 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

white_FC           150          300          147        >20.6
u_FC               308          558          246        >19.4
white              150         1013          334        >21.3
v                  639          831           39        >18.4
b                  565          758           39        >18.9
u                  308          733          265        >19.5
w1                 689          709           19        >18.5
m2                 664          856           39        >18.8
w2                 615          807           39        >19.2

The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.33 in the direction of the burst
(Schlegel et al. 1998).