\begin{table}%t1
%\centering
\par
\caption{\label{table_results}Lines observed by {\it Herschel}{\rm-PACS}.}
\begin{tabular}{lllll}   
\hline \hline \noalign{\smallskip}   
\multicolumn{1}{c}{Line} & \multicolumn{1}{c}{Cont. flux} & \multicolumn{1}{c}{Obs.}&\multicolumn{1}{c}{GH08}&\multicolumn{1}{c}{M08}\\
&  \multicolumn{1}{c}{(Jy)}& \multicolumn{3}{c}{(10$^{-18}$ W m$^{-2}$)}\\  
\hline\noalign{\smallskip} 
O{\sc i}\ $^3$P$_1 \rightarrow ^3$P$_2$ & 2.99~$\pm$~0.14 & \phantom{$<$}36.5~$\pm$~12.1 & 124--161 & 412\\
O{\sc i}\ $^3$P$_0 \rightarrow ^3$P$_1$ & 7.00~$\pm$~0.05 &       $<$5.5 & 25--41 & 11\\
C{\sc ii}\ $^2$P$_{3/2} \rightarrow ^2$P$_{1/2}$ & 8.79~$\pm$~0.08  &       $<$6.6& 0.8--12 & 0.06\\
CO 3--2 & \multicolumn{1}{c}{n.a.} & \phantom{$<$}0.43 & 0.3--0.6 & n.a.\\
$^{13}$CO 3--2 & \multicolumn{1}{c}{n.a.} & \phantom{$<$}$4.4 \times 10^{-2}$& n.a.& n.a.\\
\hline
\end{tabular}
\tablefoot{The errors and upper limits are 3$\sigma$. The calibration error adds an extra $\sim$40\% uncertainty. The CO data also have uncertainties of 30\%.}
\end{table}