TITLE:   GCN CIRCULAR
NUMBER:  16588
SUBJECT: GRB 140713A: Swift/UVOT Upper Limits
DATE:    14/07/14 11:31:48 GMT
FROM:    Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>

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).
No optical afterglow consistent with the XRT position (Beardmore et al. 
GCN Circ. 16585) 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).