\begin{table}%t4
\caption{\label{rvpar_tab}Radial-velocity parameters: the adopted orbital period $P$, the
semi-amplitude $K_2$, the constant term $\gamma$, and the standard deviation of
the fit $\sigma$.}
%\centerline
{
\begin{tabular}{lllll}
\hline\hline\noalign{\smallskip}
Object & $P$ & $K_2$ & $\gamma$ & $\sigma$ \\
       & [d] & [km s$^{-1}$] & [km s$^{-1}$] & [km s$^{-1}$] \\
\hline\noalign{\smallskip}
EC~12477--1738 & 0.362(08)  & 79(04) & 29(03)    & 19 \\
EC~13349--3237 & 0.4695(01) & [29(06) & $-$6(04)  & 27] \\
                & 0.4757(01)$^1$ &      &           &    \\
                & [0.323(08) & 41(04) & $-$10(03) & 20]$^2$ \\
EC~14329--1625 & 0.3500(08) & 58(03) & $-$42(02) & 12 \\
                & 0.3457(08)$^1$ &        &           &    \\
\hline
\end{tabular}}
\medskip
\par
1) best alias period, yielding an equally acceptable light curve;
2) the ``spectroscopic'' period and the radial 
velocity parameters are formally included, but should be taken with great 
caution, due to the radial-velocity variation being not well understood
\end{table}