GCN Circular 14950

N. P. M. Kuin and S. R. Oates (UCL-MSSL) report on behalf of
the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of
GRB 130627B  3755 s after the BAT trigger (Oates et al.,
GCN Circ. No. 14936 and 14939).

No optical afterglow consistent with the XRT position
Evans et al. GCN Circ. No. 14947 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 first
finding chart (FC) exposure and subsequent exposures are:

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

white_FC          3755         3905          147         >20.3
white             3755         5137          344         >20.9
v                 3911         5474          320         >19.5
b                 4733         4932          197         >20.1
u                 4526         4726          197         >19.7
w1                4321        11240          757         >20.3
m2                4116        10664         1082         >20.4
w2                5143         5343          197         >19.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.40 in the direction of the burst
(Schlegel et al. 1998).