\begin{table}%t2
\caption{Line parameters of CO isotopomers at the peak position (IRAM-30~m
observations). 
All line parameters have been obtained from
a two-Gaussian fit, except for the \CIII\ (1--0) line, for which we have used
METHOD HFS of the CLASS program to take into account the hyperfine structure 
(see text).}
\label{linepar}
%\centering
\par
\begin{tabular}{ccccc}
\hline \hline\\[-3mm]
Line  &  rms  &  $V_{\rm lsr}$ & $\Delta v_{1/2}$ & $\int T_{\rm MB}{\rm d}v$  \\
     & (K)  &  (\kms\ )  &   (\kms\ )   & (K \kms\ )   \\
\hline
\CII\ (1--0) &  0.065  &  $-50.0$  & 2.38  & 3.73 \\
             &         &  $-47.8$  & 1.20  & 2.59 \\
\CIII\ (1--0) &  0.064  &  $-49.9$  &  2.08 &  1.18  \\
              &         &  $-47.5$  &  1.12 &  0.41  \\ 
\CIII\ (2--1) & 0.18  & $-49.8$ & 2.93  & 5.06 \\
              &       & $-47.3$ & 0.90  & 0.69 \\
\hline
\end{tabular}
\end{table}