\begin{table}%t1
\caption{\label{5:tab:lines}Overview of the observations.}
\par
%\centerline
{\small
\begin{tabular}{l l l l l r l l}
\hline \hline
Mol. & Trans.& $E_{\rm u}$ & Freq. & Instrument & Beam & Map & Map size\\ 
 & $J_{\rm{u}}$--$J_{\rm{l}}$ & (K) & (GHz) &  &($''$)& \\ 
 \hline
CO & 2--1 & 16.6 &230.538 & APEX-1 & 28 & y & $200''\times170''$ \\
   & 3--2 & 33.2 &345.796 & APEX-2a & 18&  y & $80''\times80''$\\
   & 4--3 & 55.3 & 461.041 & FLASH-I & 14 &y & $40''\times40''$ \\
   & 6--5 & 116.2 & 691.473 & CHAMP$^+$-I & 9 &y & $80''\times80''$$^a$\\
   & 7--6 & 154.8 & 806.651 & CHAMP$^+$-II & 8 &y &$80''\times80''$\\
 $^{13}$CO & 3--2 & 31.7 &330.588 & APEX-2a & 18 & n & --\\
  & 4--3 & 52.9 & 440.765 &FLASH-I & 14 &n  & --\\
  & 6--5 & 111.1 & 661.067 &CHAMP$^+$-I & 9 & y & $50''\times50''$\\
  & 8--7 & 190.4 & 881.273 &CHAMP$^+$-II & 8 & n & -- \\
 C$^{18}$O & 3--2 & 31.6 & 329.331 &APEX-2a & 18 &n & --\\
 & 6--5 & 110.6 & 658.553 & CHAMP$^+$-I & 9 &n & -- \\
$[$C I$]$ & 2--1 &  62.3 & 809.342 & CHAMP$^+$-II & 8 & y & $50''\times50''$$^a$\\
HCO$^+$ & 4--3 & 42.8 & 356.724 & APEX-2a& 18 & y &$80''\times80''$\\\
H$^{13}$CO$^+$ & 4--3 & 41.6 &346.998 & APEX-2a  & 18 &n & --\\ \hline
\multicolumn{4}{c}{870 $\mu$m continuum} & LABOCA & 18 & y & $6'\times6'$ \\ \hline
\end{tabular}}
\par
\medskip
$^a$ Additional mapping was performed in these lines around the bow shock position.
\end{table}