\begin{table} %T2
\caption{\label{tab:co2}Intensity of the CO(1--0) emission line after
  continuum \mbox{subtraction}.}
%\centering
\par
\begin{tabular}{lcccc} 
\hline 
\hline \noalign{\smallskip}
Aperture     & redshift & $I_{\rm line}$          & $L^\prime$                    & $F_{\rm{cont}}$ \\ 
             &          & [Jy~km~s$^{-1}$]  &  [K~km~s$^{-1}$~pc$^{2}$]  &  [mJy] \\ 
\hline \noalign{\smallskip}
$2.5\arcsec\times2.1\arcsec$ & 0.0901 & $0.5\pm0.1$& $2\pm 1 \times 10^{8}$  &   0.99\\ 
$5\arcsec\times5\arcsec$\tablefootmark{a}      & 0.0901 & 1.0$\pm$0.2& 3.8$\pm$1$\times$10$^{8}$  &   0.99
\\ 
\hline 
\end{tabular}
\tablefoot{\tablefoottext{a}{Aperture
  corresponds to the slit width of the IRS spectrum.}} 
\end{table}