\begin{table}%t2
\caption{\label{param}Line parameters of newly detected masers.}
%\centerline
 {
\begin{tabular}{l c c c c c c c c c l}
\hline
\hline
%\\
Source &\textit{D}$^{a}$&Epoch&Tel.&$\int S ~\rm{d} \textit{V}^{b}$&$V_{\rm{LSR,opt}}^{b}$ &$\Delta V_{1/2}^{b}$&\textit{V}-range&Channel&rms&$L_{\rm{H_{2}O}}^c$ \\ 
       &      &     &    &                &                &                  &        & Width  &   &  \\
       &(Mpc) &     &    & (mJy km s$^{-1}$)& (km s$^{-1}$)    & (km s$^{-1}$)      &(km s$^{-1}$)& (km s$^{-1}$)& (mJy)&(\solum)
\\
\hline
NGC~3256 & 37.4& Aug. 2007      & Tid &315  & $2827\pm6$      &    $63\pm14$       & 2065, 3407& 0.5 & 3 & 10.9\\
          &     & Apr. 2008      & ATCA&27.0 & $2822.1\pm0.9$  &    $7.7\pm2.3$     & 2611, 2878& 3.7 & 4 & 1.0\\
          &     &               &     &32.8 & $2840.2\pm2.4$  &    $15.6\pm6.3$    &           &     & 7 & 2.4\\
          &     & Apr. 2008      & Tid &400  & $2797\pm2$      &    $40.0^{d}$      & 2067, 3409& 0.5 & 3 & 12.9\\ 
          &     &               &     &         &           &                  &           &     &   & \\
NGC~3620 & 22.4& Feb.--March 2005& Tid &150      & $1823^{d}$&    $10.0^{d}$    & 1000, 2346& 0.5 & 7& 4.7$^{e}$ \\
          &     &               &     &255.2    & $1833^{d}$&   $4.4\pm0.5$     &           &     &   & \\
          &     & Apr. 2006      &ATCA & 71.3 & $1821.1\pm0.1$ & $2.5\pm0.2$    & 1777, 1854& 0.2 & 3 & 2.1$^{f}$\\
          &     &               &     & 12.7 & $1825.1\pm0.1$ &   $1.4\pm0.4$  &           &     &   & \\
          &     &               &     & 97.2 & $1827.4\pm0.8$ &  $12.3\pm1.4$  &           &     &   & \\
          &     & Aug. 2007      & Tid & 376  & $1826.1\pm0.8$ & $20.0^{d}$     & 952, 2298 & 0.5 & 3 & 4.3\\
          &     & Mar. 2008      & Tid & 103.7&  $1820^{d}$  &  $6.1\pm1.7$    & 1385, 2245 & 0.5 & 5 & 3.2$^{e}$ \\
          &     &               &     & 124.7&  $1828^{d}$  &  $4.3\pm0.8$    &            &     &   &  \\
          &     & Apr. 2008      & Tid & 114.4& $1817.5\pm3.4$ & $10.4\pm6.8$  &  994, 2339 & 0.5 & 5 & 2.5$^{e}$\\
          &     &               &     & 98.8 & $1824.7\pm0.8$ & $3.8\pm2.6$   &            &     &   & \\
\hline 
\end{tabular}}
\par
\medskip
$^a$ Distances have been estimated by using velocities taken from the NASA/IPAC Extragalactic Database (NED) and adopting a Hubble constant of $H_{\rm{0}}= \rm{75 ~ km~ s^{-1}~ Mpc^{-1}}$.\\
$^b$ Integrated flux densities, centre velocities, and full width to half maximum ({\it FWHM}) linewidths of the observed features are obtained from Gaussian fits.\\
$^c$ Isotropic luminosities are derived from $L_{\rm{H_{2}O}}/[\solum]=0.023 \times \int S ~ \rm{d}\textit{V}/[\rm{Jy \ km \ s^{-1}}] \times \textit{D}^{2}/[\rm{Mpc^{2}}]$.\\
$^{d}$ Values obtained by forcing the fit.\\
$^e$ The water maser emission consists of two features.\\
$^{f}$ The water maser emission consists of three features.
\end{table}