TITLE:   GCN CIRCULAR
NUMBER:  14780
SUBJECT: GRB 130605A: Swift/UVOT Detection
DATE:    13/06/06 19:00:31 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel@swift.psu.edu>

B. Porterfield (PSU) and S. T. Holland (STScI)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 
130605A 96 s after the BAT trigger (Holland et al., GCN Circ. 14773).
A source consistent with the optical position(Guelbenzu et al. GCN
Circ. 14774) is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) = 08:58:08.61 = 134.53587 (deg.)
    Dec (J2000) = -33:27:40.2 = -33.46118 (deg.)
with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).

Preliminary detections and 3-sigma upper limits using the
UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc.
1358, 373) for the early exposures are: 

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

white fc       95          202         105     16.40+-0.07
wh           5498         5698         196     21.04+-0.29
v            4474         6109         393     19.90+-0.36
b            5294        30053        1355    >21.70
u            5089        35820        3306    >21.45
w1           4884        35150        3778    >21.57
m2           4679        34243        2860    >21.02
w2           5705        39258         421    >20.27

The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.36 in the direction
of the burst (Schlegel et al. 1998).