\begin{table}%T2
\caption{\label{sample}H$_2$O-megamaser sample properties.}
\par
%\centerline
 {
\begin{tabular}{lccc}
\hline
\hline
 & \rm{ESO~103-G035} & \rm{TXS~2226-184} & \rm{\object{IC~1481}}\\
\hline
& \multicolumn{3}{c}{\rm literature}\\
\hline
{\rm coordinates}$^a$ & 18\h 38\m 20\s~$-65^\circ$25\arcmin 39\arcsec 
& 22\h 29\m 13\s~$-18^\circ$10\arcmin 47\arcsec & 23\h 19\m 25\s~+05$^\circ$54\arcmin 22\arcsec\\
%\hline
\rm{incl.$^b$(\degr)} & 67\degr 
& 70\degr & 62\degr\\
%\hline
\rm{m.a.}$^c$(\degr) & 44\degr & 51\degr & 70\degr
(30\degr$^d$)\\
%\hline
$v_{\rm
opt}$$^e$ (\rm{km} \rm{s}$^{-1}$)
& 3983 $\pm$ 34
& -- & 6118$^f$ $\pm$ 50 \\
%\hline
\rm{Type}$^{g}$ & \rm{Sy~1.9/2, Sa0} &
\rm{?, S0?} & \rm{LINER, 
Sb pec$^{f}$}\\
\hline
& \multicolumn{3}{c}{\rm this work}\\
\hline
$v_{\rm hel}^h$ 
(\rm{km} \rm{s}$^{-1}$) & 4040 $\pm$ 20 & 7520 $\pm$ 30 & 6120 $\pm$ 30\\
%\hline
\rm{dist.}$^i$ (\rm{Mpc})
& 61.9 & 110.6 & 88.5 \\
\rm{lin. sc.} (\rm{pc/\arcsec}) & 300.2 & 536.3 & 428.8\\
%\hline
$M_{\alpha}$${}^j$ (10$^9$~$M_{\odot}$) 
& 1.2 & -- & --\\
\rm{Type} & Sy~2 & LINER & LINER\\
\hline
\end{tabular}}
\medskip
$^a$ J2000, NED.\\
$^b$ Inclination angle from face--on (RC3).\\
$^c$ Position angle of major axis (RC3).\\
$^d$ Taken from \citet{bra97}.\\
$^e$ Heliocentric velocity from RC3.\\
$^f$ Taken from \citet{van02}.\\
$^g$ AGN classification and Hubble type (NED).\\
$^h$ Heliocentric velocity as derived from our rotation curves.\\
$^i$ Distance via direct application
of $v = H_0 \cdot d$ ($H_0 = 65$~km~s$^{-1}$~Mpc$^{-1}$) using velocities
relative to the 3K background as derived from $v_{\rm hel}$ with the velocity calculator
provided by NED.\\
$^j$ Estimated lower limit of mass
with $\alpha=0.6$ \citep{leq83}
within the central 2.8~kpc (diameter).
%\vspace*{2mm}
\end{table}