\begin{table}%t2
\caption{\label{n4441chap_iramobs}Parameters for the CO observations of NGC~4441 with the OSO~20~m and IRAM~30~m telescopes as well as the Plateau de~Bure interferometer.}
\par
\small%\centerline
 {
\begin{tabular}{lccc}
\hline\hline \noalign{\smallskip}
 obs. parameters & IRAM 30 m & OSO 20 m & PdB\\
\hline\noalign{\smallskip}
$T_{\rm sys}$ (K)& 200$-$340 ($^{12}$CO) & $\sim$350 & 180\\ 
 & $\sim$145 ($^{13}$CO) & -- & --\\
$\theta_{\rm beam}$ CO(1--0) &  22\arcsec& 33\arcsec & 3.25\arcsec\\
$\theta_{\rm beam}$ CO(2--1) & 11\arcsec&--&--\\
$\Delta v$  CO(1--0) & 21.0~km~s$^{-1}$ & 33.8~km~s$^{-1}$ & 6.6\\  
$\Delta v$  CO(2--1) & 21.0~km~s$^{-1}$ &-- & --\\   
$\eta$ &0.75 (1--0) / 0.52 (2--1) & 0.43& 0.6--0.9\\
\hline
\end{tabular}}
\medskip
The velocity resolution given is a smoothed one, which is used throughout this~paper.
\end{table}