\begin{table}%t3
\caption{\label{tablerv}Radial velocity parameters (errors at 1$\sigma$). \label{tab-rvfits}}
%\centerline
 {\small 
\begin{tabular}{ccccccc}
\hline \hline \noalign{\smallskip}
Template &Spectral &$\gamma$ &$\gamma_{2}^{a}$  &$K_{_2}$ &$T_0$ & $\chi^2_{\nu}$\\
&type &(km s$^{-1}$) &(km~s$^{-1}$) &(km~s$^{-1}$) & $({\rm HJD}-2452576)$ & (d.o.f.~=~53)\\
\hline  \noalign{\smallskip}
HD~10780 & K0~V & $-56.2 \pm 1.1$ & $ -53.5 \pm 1.2$ & $161.6 \pm 1.5$  & $0.4457 \pm 5\times10^{-4}$ & 9.1  \\
HR~10476 & K1~V & $-20.9 \pm 1.1$ & $ -54.7 \pm 1.1$ & $161.7 \pm 1.5$ & $0.4455 \pm 5\times10^{-4}$ & 9.4  \\
HR~16160 & K3~V & $-76.4 \pm 1.0$ & $ -50.7 \pm 1.2$ & $162.3 \pm 1.4$  & $0.4457 \pm 4\times 10 ^{-4}$ & 10.1 \\
HD~6660 & K4~V & $-59.7 \pm 1.0$ & $ -54.9 \pm 1.6$ & $162.2 \pm 1.4$  & $0.4456 \pm 4\times 10^{-4}$ & 13.5  \\
HD~10436& K5~V & $ -2.8 \pm 1.0$ & $ -54.2 \pm 2.9$ & $162.4  \pm  1.4$  & $0.4457 \pm 4\times10^{-4}$ & 11.9  \\
\hline
\end{tabular}}
\medskip
$^a~\gamma_{_2}$: Systemic velocity after adding the radial velocity of the template star as found in Gontcharov (2006).
\par
\end{table}