\begin{table}%t1
       \caption{Sample of galaxies$^{a}$.}
         \label{tab:galaxies}
\small%\centerline
{
         \begin{tabular}{lccccccc}
            \hline\hline
            \noalign{\smallskip}
            Galaxy & Seyfert  & RA & Dec & $v_{\rm sys}$ & Distance$^{b}$ & $\Omega_{\rm S}$(CO)$^{c}$ & $\Omega_{\rm S}$(HCN)$^{d}$\\
                   &     & [hh mm ss] & [$^{\circ}~{}'~{}''$] & [\kms] & [Mpc] & [$''~^2$] & [$''~^2$]\\  
            \noalign{\smallskip}
            \hline
            \noalign{\smallskip}
            NGC~3079 & 2   & 10 01 57.805 & +55 40 47.20 &$1116 \pm 1$&$15.0 \pm 1.1$& $15\times 7.5$ & $5\times 5$ \\
            NGC~1068 & 2   & 02 42 40.711 & --00 00 47.81 &$1137 \pm 3$&$15.3 \pm 1.1$& $30\times 30$ & $10\times 10$ \\
            NGC~2623 & 2   & 08 38 24.090 & +25 45 16.80 &$5549 \pm 1$&$74.6 \pm 5.4$& $8\times 8$ & $2.6\times 2.6$ \\
            NGC~1365 & 1.8 & 03 33 36.371 & --36 08 25.45 &$1636 \pm 1$&$22.0 \pm 1.6$& $50\times 50$ & $16.5\times 16.5$ \\
            NGC~7469 & 1.2 & 23 03 15.623 & +08 52 26.39 &$4892 \pm 2$&$65.8 \pm 4.8$& $8\times 8$ & $4\times 6$ \\
                       \hline
         \end{tabular}}
         \smallskip
\begin{list}{}{}
\item[$^{{a}}$] The Seyfert classification, positions (in equatorial 
J2000 coordinates) and heliocentric radial velocities were taken from NED.
\par
\item[$^{{b}}$] The distances were calculated using the Hubble constant 
($H_0 \approx 74.37$~\kms~Mpc$^{-1}$) estimated by Ngeow \& Kanbur (\cite{ngeow06}).
\par
\item[$^{{c}}$] The source sizes of the CO~1$-$0 transition line were 
estimated from the maps presented in Koda et~al. (\cite{koda02}) for NGC~3079, 
Schinnerer et~al. (\cite{schinnerer00}) for NGC~1068, Bryant et~al. (\cite{bryant99}) 
for NGC~2623, Sandqvist (\cite{sandqvist99})
 for NGC~1365, and Papadopoulos \& 
Allen (\cite{papadopoulos00}) for NGC~7469. The source sizes for the $J = 2{-}1$ 
transition line were assumed equal to that of the $J = 1{-}0$ line. For NGC~7469, 
the source size of the CO~2$-$1~emission estimated from the corresponding map 
presented by Davies et~al. (\cite{davies04}) agrees well with the source size
estimated for the CO~1$-$0~line.
\par
\item[$^{{d}}$] Source sizes of HCN~1$-$0 were estimated from the corresponding 
maps published in Kohno et~al. (\cite{kohno00}) for NGC~3079, Kohno et~al. 
(\cite{kohno01}); and Helfer \& Blitz (\cite{helfer95}) for NGC~1068, Davies 
et~al. (\cite{davies04}) for NGC~7469. The source sizes of NGC~2623 and NGC~1365 
were estimated using proportions found in NGC~1068 (read text in Sect.~3.5). 
Because of their chemical link, the source sizes of the CN and HNC molecules 
were assumed the same as that of HCN. Due to the lack of high resolution maps, 
the source sizes corresponding to the emission of the higher transition lines 
were assumed equal to that of the $J = 1{-}0$~line.
\end{list}
\end{table}