\begin{table}%t1
\caption{Observation parameters for the SCUBA jiggle-maps.}\label{tbl:obs}
%\centerline
{
\begin{tabular}{lccccccc} 
\hline  \hline
Map name & Night & Chop throw & Integrations$^{\rm a}$ &
\multicolumn{2}{c}{Average
$\tau$} & \multicolumn{2}{c}{rms~noise (Jy/14\arcsec~beam)$^{\rm b}$} \\
 & & & & 450 $\mu$m & 850 $\mu$m & 450 $\mu$m & 850 $\mu$m \\
 \hline
SFO 11 & 7th Jan. 2002 & 120\arcsec & 20 & 1.82 & 0.33 & 0.2 & 0.013 \\
SFO 11NE & 5th June 2002 & 180\arcsec & 6 & 1.94 & 0.34 & 0.1 & 0.020 \\
SFO 11E & 7th Jan. 2002 & 120\arcsec & 10 & 1.82 & 0.33 &  0.3& 0.018 \\ \hline
\end{tabular}}
\medskip
$^a$ One SCUBA "integration'' is equivalent to 64 s of integration. \\
$^b$ 450 $\mu$m data smoothed to 14\arcsec~resolution.
\end{table}