GCN Circular 16588

A. A. Breeveld (UCL-MSSL) and V. Mangano (PSU) report on behalf of the 
Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 140713A 76 
s after the BAT trigger (Mangano et al., GCN Circ. 16581
Not found
 
 
).
No optical afterglow consistent with the XRT position (Beardmore et al. 
GCN Circ. 16585
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) exposure and subsequent exposures are:

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

white_FC            76          226          147         >21.8
u_FC               288          538          246         >20.8
white               76         7155          608         >22.9
v                  618         7547          313         >20.9
b                  544        29522          422         >21.5
u                  288        29406         2244         >21.8
w1                 669        17514         1084         >21.3
m2                 644        11576          357         >20.5
w2                 594         7361          333         >20.7

The magnitudes in the table are not corrected for the Galactic 
extinction due to the reddening of E(B-V) = 0.05 in the direction of the 
burst (Schlegel et al. 1998).