\begin{table}%T1
\caption{\label{tab:1}Parameters of the observing run with IRAM 
30~m single dish. 
%The main beam efficiency is based on a fit of measured data to the Ruze formula: 
%$\eta_{\rm mb}=1.2\epsilon \exp(-(4\pi R \sigma/\lambda)^2)$ with $\epsilon=0.69$ and $R\sigma=0.07$. 
%The forward efficiency is a coupling efficiency to the sky.
}
\small
%\centering
\par
\begin{tabular}{lcc}
\hline
\hline
Parameters & CO(1$-$0) & CO(2$-$1) \\
\hline\noalign{\smallskip}
central coordinates & \multicolumn{2}{c}{$\rm RA = 18^{h}11^{m}51.3^{s}$, $\rm Dec = +14^{\circ}58\arcmin 52.1\arcsec$} \\
backends & \multicolumn{2}{c}{4~MHz filter bank/autocorrelator}\\
redshift $z$ & \multicolumn{2}{c}{0.007662}\\
sky frequency [MHz] & 114.400 & 228.798\\
beam size [arcsec] & 21.50 & 10.75\\
beam efficiency $B_{\rm eff}$ & 0.739 & 0.527\\
forward efficiency $F_{\rm eff}$ & 0.95 & 0.91\\
total obs. time [s] & 14~994 & 14~994\\
Nr. of positions & 49 & 49\\
Nr. of scans &  294 & 294\\
\hline
\end{tabular}
\end{table}