GCN Circular 14715

M. M. Chester (PSU) and B. P. Gompertz (U Leicester)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 130527A
113 s after the BAT trigger (Gompertz et al., GCN Circ. 14703
Not found
 
 
).
No optical afterglow consistent with the XRT position (Evans et al. 
GCN Circ. 14705
Not found
 
 
) 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) exposures and subsequent exposures are:

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

white_FC           113          263          147         >21.2
white              113         1547          392         >21.1
white             4949        12020          623         >21.8

v                  655         1596          117         >18.7
v                 5359         5559          197         >19.5

b                  581         1693          114         >20.2
b                 6179        11579          906         >21.3

u_FC               325          575          246         >20.3
u                  325         1671          343         >20.2
u                 5974        18261         1072         >21.1

w1                 704         1646           97         >19.8
w1                5769        17356         1082         >21.1

m2                 680         1621          117         >20.0
m2                5564         5764          197         >19.8

w2                 630         1572          117         >20.6
w2                5154         5354          197         >20.2

The magnitudes in the table 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).