[vsnet-grb-info 6312] Swift/UVOT observation of GRB080702A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7932
SUBJECT: Swift/UVOT observation of GRB080702A 
DATE:    08/07/03 11:42:40 GMT
FROM:    Massimiliano de Pasquale at MSSL-UCL  <mdp at mssl.ucl.ac.uk>

  M. De Pasquale (MSSL/UCL) on the behalf of the
Swift/UVOT team:


The Swift/UVOT began settled exposures of the field of
GRB080702A 73s after the BAT trigger (De Pasquale et al.,
GCN Circ. 7920). We do not find any newsource in any
of the exposures inside the enhanced XRT error circle
(Goad et al., GCN Circ. 7923).

The 3-sigma upper limits for detecting a source in the
first finding chart (FC) exposure and co-added frames are:

Filter        T_start(s)   T_stop(s)    Exp(s)  Mag (3-sigma UL)

white (FC)        73          172          98      >20.8
white            674         5688         314      >21.4
v                179          578         393      >20.0
v                713         6099         305      >19.8
b                659         6840         334      >20.8
u                634         6714         432      >20.6
uvw1             610         6509         432      >20.2
uvm2             585         6303         432      >20.3
uvw2             689         5894         235      >20.3

The values quoted above are not corrected for the expected
high Galactic extinction corresponding to a reddening of
E(B-V) = 0.67 mag in the direction of the burst (Schlegel et
al. 1998).