\begin{table} %t1
\caption{\label{tab:co1}CO(1--0) line-fit parameters.}
\small
%\centering
\par
\begin{tabular}{lccc} 
\hline 
\hline \noalign{\smallskip}
Aperture    & $\nu_{\rm obs}$ & Peak   &  Width \\ 
         & [GHz]     & [mJy]  &   [km~s$^{-1}$] \\ 
\hline \noalign{\smallskip}
$2.5\arcsec\times2.1\arcsec$  & 105.744 & $1.1\pm0.2$&$351\pm98$\\
$5\arcsec\times5\arcsec$\tablefootmark{a}    & 105.744 & $1.5\pm0.3$&$351\pm$98
\\
\hline 
\end{tabular}
\tablefoot{\tablefoottext{a}{Aperture
  corresponds to the slit width of the IRS spectrum (solid line in
  Fig.~\ref{fig:CO_spectrum}).} }
\end{table}