\begin{table}%t1
%\centering
\par
\caption{\label{tab_lines}Measured fluxes of detected emission lines. }
\label{table_lines}\vspace{-2mm}
\begin{tabular}{l r r r}
\hline\hline \noalign{\smallskip}
Transition name & Frequency & \multicolumn{2}{c}{Flux}   \\
& (rest, GHz) & (10$^3$~Jy~km~s$^{-1}$) & (10$^{-16}$~W~m$^{-2}$) \\
\hline  \noalign{\smallskip}
$^{12}$CO $J = 4$--3   &   461.041 &  74.1 $\pm$ 2.2 & 11.32 $\pm$ 0.33 \\
$^{12}$CO $J = 5$--4   &   576.268 &  80.9 $\pm$ 2.3 & 15.53 $\pm$ 0.45 \\
$^{12}$CO $J = 6$--5   &   691.473 &  74.0 $\pm$ 2.0 & 17.04 $\pm$ 0.46 \\
$^{12}$CO $J = 7$--6   &   806.652 &  77.7 $\pm$ 3.1 & 20.89 $\pm$ 0.84 \\
$^{12}$CO $J = 8$--7   &   921.800 &  60.7 $\pm$ 2.1 & 18.64 $\pm$ 0.65 \\
$^{12}$CO $J = 9$--8   &  1036.912 &  50.5 $\pm$ 2.3 & 17.44 $\pm$ 0.79 \\
$^{12}$CO $J = 10$--9  &  1151.985 &  32.6 $\pm$ 1.3 & 12.51 $\pm$ 0.50 \\
$^{12}$CO $J = 11$--10 &  1267.014 &  21.9 $\pm$ 1.5 &  9.28 $\pm$ 0.63 \\
$^{12}$CO $J = 12$--11 &  1381.995 &  14.0 $\pm$ 1.2 &  6.44 $\pm$ 0.57 \\
$^{12}$CO $J = 13$--12 &  1496.922 &   7.1 $\pm$ 1.9 &  3.53 $\pm$ 0.93 \\
$^{13}$CO $J = 5$--4   &   550.926 &   5.3 $\pm$ 0.7 &  0.98 $\pm$ 0.12 \\
$^{13}$CO $J = 7$--6   &   771.184 &   3.2 $\pm$ 0.6 &  0.81 $\pm$ 0.16 \\
$^{13}$CO $J = 8$--7   &   881.273 &   2.3 $\pm$ 0.7 &  0.68 $\pm$ 0.22 \\
HCN $J = 6$--5         &   531.716 &   2.9 $\pm$ 0.7 &  0.52 $\pm$ 0.12 \\
$[$\ion{C}{i}$]~^3P_1\rightarrow\ ^3P_0$  &  492.161 &  20.6 $\pm$ 1.6 & 3.38 $\pm$ 0.26\\
$[$\ion{C}{i}$]~^3P_2\rightarrow\ ^3P_1$  &  809.342 &  43.2 $\pm$ 0.9 &11.66 $\pm$ 0.25\\
$[$\ion{N}{ii}$]~^3P_1\rightarrow\ ^3P_0$ & 1462.000 & 124.1 $\pm$ 5.8 &60.51 $\pm$ 2.85\\      
\hline  
\end{tabular}
\tablefoot{Errors are 1$\sigma$ only from line fitting procedure, not including other uncertainties (see text). The $^{13}$CO $J = 6$--5 line is missing due to fringing. }
\vspace*{-5mm}
\end{table}