\begin{table}%t1
\par
     \caption{\label{tab:obs:maps}Observation parameters for the maps shown in Figs.~\ref{fig:maps-pdbi}
      and~\ref{fig:maps-30m}. The projection center of all the maps is
      $\alpha_{2000} = \rm 05^h40^m54.27^s$, $\delta_{2000} = -02\deg 28'
      00''$.}
    %\centerline
 {
       \begin{tabular}{ccrclccccccr}
          \hline \hline 
          Molecule & Transition & Frequency  & Instrument & Config. & Beam   & PA     & Vel. Resol. & Int. Time$^{a}$ & $T_{\rm sys}$ & Noise$^{b}$ & \multicolumn{1}{c}{Obs. date} \\
                   &            & GHz        &            &         & arcsec & $\deg$ & \kms{}      & h         & K       & K           & \\
          \hline
          \HthCOp{} &  1--0                          & 86.754288 & PdBI & C \& D & $ 6.76 \times 4.65$ & 13 & 0.2 & 6.5 & 150 & 0.10 & 2006--2007 \\
          HCO     & $1_{0,1}~3/2$, 2--0$_{0,0}~1/2,1$ & 86.670760 & PdBI & C \& D & $ 6.69 \times 4.39$ & 16 & 0.2 & 6.5 & 150 & 0.09 & 2006--2007 \\
          CCH     &  $1,3/2~(2)$--$0,1/2~(1)$         & 87.316925 & PdBI & C \& D & $ 7.24 \times 4.99$ & 54 & 0.2 & 6.9 & 130 & 0.07 & 2002--2003 \\
         \hline
        \end{tabular}}
    \medskip
    $^{a}$ On-source time computed as if the source were always observed with 6 antennae.
    $^{b}$ The noise values quoted here are the values at the mosaic phase center
    (Mosaic noise is inhomogeneous due to primary beam correction; it 
    steeply increases at the mosaic edges).
\par
\medskip
%\centerline
 {
      \begin{tabular}{ccrlcccrclccr}
          \hline \hline
          Molecule & Transition & Frequency  & Instrument & \# Pix. & \Feff{} & \Beff{} & Resol. & Resol. & Int. Time$^{a}$ & $T_{\rm sys}$ & Noise   & Obs. date \\
                   &            & GHz        &            &         &         &         & arcsec & \kms{} & h          &    K    &  mK       &   \\
          \hline\\[-3.2mm]
          \HthCOp{} & \Jone{}                      & 86.754288 & 30~m/AB100 & 2 & 0.95 & 0.78 & 28.4 & 0.2 & 2.6/5.0  & 133 & 69 & 2006--2007 \\
          HCO & $1_{0,1}~3/2,2 {-} 0_{0,0}~1/2,1 $ & 86.670760 & 30~m/AB100 & 2 & 0.95 & 0.78 & 29.9 & 0.2 & 2.6/5.0  & 133 & 63 & 2006--2007 \\
          HCO & $1_{0,1}~3/2,1 {-} 0_{0,0}~1/2,0 $ & 86.708360 & 30~m/AB100 & 2 & 0.95 & 0.78 & 29.9 & 0.2 & 2.6/5.0  & 133 & 63 & 2006--2007 \\
          HCO & $1_{0,1}~1/2,1 {-} 0_{0,0}~1/2,1 $ & 86.777460 & 30~m/AB100 & 2 & 0.95 & 0.78 & 29.9 & 0.2 & 2.6/5.0  & 133 & 66 & 2006--2007 \\
          HCO & $1_{0,1}~1/2,0 {-} 0_{0,0}~1/2,1 $ & 86.805780 & 30~m/AB100 & 2 & 0.95 & 0.78 & 29.9 & 0.2 & 2.6/5.0  & 133 & 66 & 2006--2007 \\
          \hline
        \end{tabular}}
        \medskip
 $^{a}$ Two values are given for the integration time: the on-source
    time and the telescope time.
    \end{table}