TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5445
SUBJECT: GRB060813: Swift/UVOT upper limits
DATE:    06/08/14 15:13:57 GMT
FROM:    Antonino Cucchiara at PSU  <cucchiara@astro.psu.edu>

A. Cucchiara, P. Brown, A. Moretti report on behalf of the
Swift/UVOT team:

The Swift UVOT began observing GRB 060813 (trigger #224364,
A. Moretti et al., GCN Circ. 5442) 83 seconds after the BAT
trigger. No optical afterglow is detected in the XRT refined error
circle (A. Moretti et al., GCN Circ. 5444).

The 3-sigma limiting magnitudes for the finding chart and the
coadded images for the UVOT filters are listed below:

Finding chart:

Filter        T_range (s)    Exposure (s)    3sigma UL
White         83-181         98              19.46

Coadded images:

Filter          T_range (s)      Exposure (s)   3sigma UL
WHITE           83-12239         1394           20.89
V               183-29590        1235           19.66
B               391-18023        1822           21.03
U               366-23807        2203           20.76
W1              343-23609        2200           20.82
M2              300-22702        1613           20.86
W2              419-28770        1279           20.93

T_range is calculated from the time of the burst. No correction has
been made for the Galactic reddening of E(B-V) = 0.33 mag
(Schlegel et al. 1998) along the line of sight to the burst.