\begin{table}%t1
\par
  \caption{\label{obspar}Line parameters.}
  \small%\centering
\par
  \begin{tabular}{c c c c c c c c c}
    \hline  \hline\noalign{\smallskip}
    Line             & Transition          & Frequency   & Observed Area               & $T_{{\rm peak}}$ & $\int  T  {\rm d}v$ & $V_{{\rm peak}}$ & $\Delta V$ \\      
    &            &   [GHz]   &  [arcsec$^2$] & [K] & [K~\kms\ ] & [\kms\ ] & [\kms\ ] \\
    \hline                          
    HCO$^{+}$        & $(J=4\rightarrow3)$ & 356.7342880 & $200^{\prime \prime} \times 150^{\prime \prime}$ & $5.7 \pm 0.1$  & $42.6 \pm 1.8$ & 94.8 & 8.4\\   % inserting body of the table
    H$^{13}$CO$^{+}$ & $(J=4\rightarrow3)$ & 346.9983381 & $90^{\prime \prime} \times 90^{\prime \prime}$ & $1.2 \pm 0.02$ & $5.5  \pm 0.6$ & 98.1 & 3.0\\
    HCN              & $(J=4\rightarrow3)$ & 354.5054779 & $200^{\prime \prime} \times 150^{\prime \prime}$ & $3.8 \pm 0.1$ & $73.5 \pm 13.8$ & 93.8 & 9.5     \\   % inserting body of the table
    H$^{13}$CN       & $(J=4\rightarrow3)$ & 345.3397750 & $30^{\prime \prime} \times 30^{\prime \prime}$ & $1.4 \pm 0.1$ & $14.8  \pm 0.4$ & 99.1 & 4.8 \\
    CS               & $(J=7\rightarrow6)$ & 342.8828503 & $90^{\prime \prime} \times 90^{\prime \prime}$ & $3.6 \pm 0.2$ & $38.7 \pm 0.9$ & 98.5 & 3.8\\
    $^{12}$C$^{16}$O & $(J=3\rightarrow2)$ & 345.7959899 & $200^{\prime \prime} \times 150^{\prime \prime}$ & $16 \pm 2.2$& $317 \pm 21.1$ & 98.8 & 9.6 \\
    $^{13}$C$^{16}$O & $(J=3\rightarrow2)$ & 330.5879652 & $90^{\prime \prime} \times 90^{\prime \prime}$ & $8.5 \pm 1.2$ & $125 \pm 7.6$  & 97.4 & 6.3 \\
    $^{12}$C$^{18}$O & $(J=3\rightarrow2)$ & 329.3305525 & $30^{\prime \prime} \times 30^{\prime \prime}$ & $3.1 \pm 0.2$ & $42.9 \pm 10.0$    & 98.8 & 4.7 \\
    \hline
  \end{tabular}
  \tablefoot{Parameters for all molecular line observations. 
    The values for $T_{{\rm peak}}$ and $\Delta V$ are
    calculated from Gaussian fits  to the central pointing
    or $(18^{{\rm h}}47^{{\rm m}}46.9^{{\rm s}},
-1^{\circ}54^{\prime}29.1^{\prime \prime})$. For HCN and HCO$^{+}$,
   the V$_{{\rm peak}}$ was taken from
   Gaussian fits done to the most intense component, while the line-width corresponds to
   the whole line. For $^{12}$CO and 
   $^{13}$CO the fit was done over the whole spectrum.}
\end{table}