\begin{table}%T1
\caption{\label{beam} Observational parameters and Gaussian line fits.}
%\centerline
 {\small
\begin{tabular}{lccccccc}
\hline\hline 
Line & $\nu$$^{a}$ [GHz]  & HPBW$^{b}$ [$''$] & $\eta_{\rm mb}$$^{c}$ &  $I$$^{d}=\int T_{\rm A}^*
{\rm d}V$ [K \kms]
&
$V_{\rm c}$$^{e}$ [\kms] & $\Delta V$$^{f}$ [\kms] & $T_{\rm A}^*$$^{h}$ [mK]\\[2pt] 
\hline
CO  1--0 & 115.271 & 21  & 0.74 & $14.6 \pm 0.7$ & 2110 & 120 & 114.0  \\
CO  2--1 & 230.538 & 10  & 0.53 & $20.2 \pm 0.9$ & 2114 & 107 & 157.0  \\
CN  1--0 & 113.491 & 22  & 0.74 & $1.50 \pm 0.25$ & 2081 & 154 & 8.5  \\
CN  2--1$^{i}$ & 226.875 & 11  & 0.53 & $2.46 \pm 0.2^{j}$ & 2115 & 150 & 7.8 \\
CN  2--1$^{k}$ & 226.659 & 11  & 0.53 &  \dots	   & \dots & 215 & 5.5  \\
HCO$^+$  1--0 & 89.188 & 28  & 0.77 & $1.74 \pm 0.12$ & 2110 & 150 & 9.9 \\
HCO$^+$ 3--2 & 267.558 & 9.2  & 0.45 & $4.1 \pm 0.6$ & 2120 & 190 & 21.5  \\
HCN 3--2 & 265.886 & 9.4  & 0.46 & $2.4 \pm 0.3$ & 2110 & 240 & 9.3  \\
HNC  1--0 & 90.664 & 27  & 0.77 &  $1.24 \pm 0.12$ & 2120 & 156 & 7.5 \\
HNC 3--2 & 271.981 & 9  & 0.44 & $4.97 \pm 0.6$ & 2120 & 150 & 29.3  \\
HC$_3$N  10--9 & 90.979 & 27  & 0.77 & $0.8 \pm 0.08$ & 2110 & 122 & 6.4 \\
HC$_3$N  16--15$^{l}$ & 145.561 & 17  & 0.70 & $1.7 \pm 0.08$ & 2120 & 130 & 8.6 \\
HC$_3$N  25--24 & 227.419 & 11  & 0.53 & $1.6 \pm 0.2$ & 2130 & 140 & 10.0  \\
HNCO 4--3 & 87.925 & 28  & 0.77 & $<$0.36 (3$\sigma$) & \dots & \dots & \dots\\
H$_2$CO 2--1 & 140.839 & 17  & 0.70 & $1.05 \pm 0.2$ & 2156 & 145 & 5.7  \\
H$_2$CO 3--2 & 225.698 & 11  & 0.53 & $0.6 \pm 0.3$ & 2140 & 145 & 3.6 \\
OCS 12--11 & 145.947 & 17 & 0.70 &  $0.8 \pm 0.14$ & \dots & 174 & 4.8  \\
\hline 
\end{tabular}}
\smallskip
$^a$ Rest frequency.
$^b$ Beam width.
$^c$ Main beam efficiency. 
$^d$ Integrated intensity. 
in $T_{\rm A}^*$, uncorrected for beam efficiency and beam size. 
$^e$ Centre velocity of the line. 
$^f$ Line width from Gaussian fit. 
$^h$ Peak intensity from Gaussian fit. 
$^i$ First spingroup. 
$^j$ Including both first and second spingroup. 
$^k$ Second spingroup. 
$^l$ HC$_3$N 16--15 is contaminated by para-H$_2$CO. Its contribution is
estimated to 20\%. Fitted Gaussians
and integrated intensities are only for the HC$_3$N component (see text).
\end{table}