\begin{table}%t4
\caption{\label{table:extinction}The observed 8~$\mu$m intensity, the peak optical 
thickness, and the dust temperature toward the submm peak positions.}
\small%\centering
 
\begin{tabular}{c c c c}
\hline\hline \noalign{\smallskip}
   & $I_{\rm IRDC}^{\rm obs}$ & $\tau_{\rm 8~\mu m}^{\rm peak}$ & $T_{\rm d}$\\
Name & [$10^{-7}$~W~m$^{-2}$~sr$^{-1}$] & & [K]\\
\hline
SMM~1 & 9.89 & $0.52\pm0.21$ & $30.6\pm17.0$\\
SMM~2 & 10.39 & $0.38\pm0.19$ & $28.0\pm19.6$\\
SMM~3 & 11.73 & 0.10\tablefootmark{a} & --\tablefootmark{b}\\
SMM~4 & 10.97 & $0.25\pm0.17$ & --\tablefootmark{b}\\
SMM~5 & 8.03 & $1.25\pm0.40$ & $10.1\pm2.8$\\
SMM~7 & 8.08 & $1.22\pm0.39$ & $12.0\pm3.7$\\
SMM~8 & 7.58 & $1.56\pm0.53$ & $11.5\pm3.7$\\
SMM~9 & 6.99 & $2.19\pm0.98$ & $10.8\pm4.3$\\
\hline 
\end{tabular} 
\tablefoot{
\tablefoottext{a}{No error given because it is greater than the
actual value.}\\
\tablefoottext{b}{The value of $T_{\rm d}$ could not be 
reasonably estimated.}}
\end{table}