\begin{table}%t1
      \caption{\label{linepara}Observed line parameters.}
    %\centerline
{ \begin{tabular}{l c c c c c c c}
            \hline\hline
            \noalign{\smallskip}
            Line & $\nu_{\rm obs}$ & $S_\nu$ & $\Delta
      V_{\rm FWHM}$ & $I$& $V^{{a}}$ & $L'$/10$^{10}$ & Ref.
            \\
                 & [GHz] & [mJy] & [\kms] & [Jy \kms]&[\kms] & [K
      \kms~ pc$^2$] &\\
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
  \cco            & 97.1928     &  30.0 $ \pm$ 1.7     & 416 $\pm$  6   &
                   13.2 $\pm$ 0.2 &  $-5.6$ $\pm$ 2.4&18.0 $\pm$ 0.3 &
 this paper\\
 \ctwo           & 227.4376  &  13.2 $ \pm$ 2.9     & 368 $ \pm $ 25 
 & 5.2 $ \pm$ 0.3  & 53 $\pm$ 20 &1.30 $\pm$ 0.07 & this paper\\
\cone             & 138.351  &  7.7 $\pm$ 0.8  & 430 $ \pm $ 46 
 & 3.6 $ \pm$ 0.4  & $-47$ $\pm$ 24 &2.4 $\pm$ 0.3 & B97\\
            \noalign{\smallskip}
            \hline
           \end{tabular}}
\smallskip
 Quoted errors are statistical errors from Gaussian
            fits. Systematic calibration uncertainty is 10\%. \\ 
$^{{a}}$ The velocity is given relative to $z=2.5579$, the
      mean redshift of the CO lines determined by B97.\\
CO fluxes for 3--2, 4--3, 5--4, 7--6 are: 13.2, 21.1, 24.0, 47.3
[Jy \kms]; all values except for 3--2 are from B97.\\
CO line luminosities $L'$ are: 18.0, 16.1, 11.7, 10.9 [10$^{10}$~\lsol].
\end{table}