\begin{table}%t5
\caption{\label{n4441chap_13cotab}Parameters of $\rm ^{12}$CO and $\rm ^{13}$CO at the central   position.}            
\small%\centerline
 {
\begin{tabular}{lccccccccc}       
\hline\hline \noalign{\smallskip}          
Line & \multicolumn{2}{c}{Central velocity (lsr)} &
\multicolumn{2}{c}{Linewidth}  & \multicolumn{2}{c}{Peak} & int. Intensity \\ 
& \multicolumn{2}{c}{(km~s$^{-1}$)} & \multicolumn{2}{c}{(km~s$^{-1}$)} & \multicolumn{2}{c}{(K)}  & (K~km~s$^{-1}$)\\
  \hline                  
$\rm ^{12}$CO(1--0)&  2698 & 2796 &125 & 147 & 0.02 & 0.036& 7.52 $\pm$
0.22\\
$\rm ^{12}$CO(2--1)& 2655 & 2802&93 & 114& 0.016, & 0.039& 6.10 $\pm$ 0.73\\
$\rm ^{13}$CO(1--0)& \multicolumn{2}{c}{2725}&
  \multicolumn{2}{c}{208} & \multicolumn{2}{c}{0.0018}&
      0.37 $\pm$ 0.06\\ 
$\rm ^{13}$CO(2--1)&  \multicolumn{2}{c}{2785}&\multicolumn{2}{c}{61}&
\multicolumn{2}{c}{0.0033} & 0.25 $\pm$ 0.09\\
\hline                                   
\end{tabular}}
\medskip
Gaussians were fitted to determine linewidths, peak intensity, and central velocity. For~$\rm ^{12}$CO, we fitted two components to the measured line, whereas for $\rm ^{13}$CO only one   component was fitted. The given intensity is integrated over both components. Temperatures are given in~$T_{\rm MB}$.
\end{table}