TITLE:   GCN CIRCULAR
NUMBER:  14728
SUBJECT: GRB 130529A: Swift/UVOT Upper Limits
DATE:    13/05/30 12:45:32 GMT
FROM:    Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>

S. R. Oates (MSSL-UCL) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 130529A
123 s after the BAT trigger (D'Elia et al., GCN Circ. 14717).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 14723)
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           123          272          147         >21.6
u_FC               281          530          246         >20.8
white              123         7633          824         >22.1
v                  611        12979         1237         >20.8
b                  536        19245         1031         >21.1
u                  281        18726         1641         >21.5
w1                 660        17812         1415         >21.6
m2                 635        13481          822         >21.0
w2                 587        12064         1275         >21.8

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).