\begin{table}%t2
\par
\caption{\label{tab:prop}Derived properties for SMMJ163555 and SMMJ163541. }
%\centerline
 {\begin{tabular}{lcccccc}
\hline
\hline
& $D_{\rm A}$ [Gpc] & $\mu$$^{a}$ & $D=1\arcsec$ [kpc] & $L{\rm '_{CO}}$ [K km~s$^{-1}$ pc$^2$] & $M_{\rm gas}$ [$M_\odot$] & $L_{\rm FIR}$ [$L_\odot$] \\
\hline
SMMJ163555 & 1.66 & 7.1 & 1.1 & $2.3\times10^{9}$   & $1.8\times10^{9}$  &
$4.5\times10^{11}$  \\
SMMJ163541 & 1.57 & 1.7 & 4.4 & $2.8\times10^{10}$  & $2.2\times10^{10}$ &
$1.5\times10^{13}$ \\
\ \ \ \ \ --\ \  two comp. & & &     & $3.6\times10^{10}$ & 
$2.9\times10^{10}$ &  \\
SMMJ163556 & 1.42 & 4.2 & 1.6 & $<$$0.4\times10^{10}$$^{b}$ & $<$$0.3\times10^{10}$ &
$8.0\times10^{12}$ \\
\hline
\end{tabular}}
\par
\smallskip
$^{a}$ Gravitational lensing magnification;
$^{b}$ based on the upper limit from Table~\ref{tab:res}
assuming a line width of 400~km~s$^{-1}$.
\end{table}