\begin{table}%t3
%\centering
\par
\caption{Results of the Fourier analysis performed on the 1993 and 1995 data. 
The frequencies $f_i$ are in~d$^{-1}$, the amplitude $K_i$ in~km~s$^{-1}$ and the 
phases $\varphi_i$\ in fractions of a day. 
The zero points are HJD~2~449~201.4558 for the~1993 data and HJD~2~449~969.3337 in 1995. 
The residuals are respectively~0.47 and 0.40~km~s$^{-1}$.\label{frequencies}}
\begin{tabular}{crrr|rrr}
\hline
\hline
\multicolumn{1}{c}{} &
\multicolumn{3}{c|}{1993} &
\multicolumn{3}{c}{1995} \\
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{$f_i$} &
\multicolumn{1}{c}{$K_i$} &
\multicolumn{1}{c|}{$\varphi_i$} &
\multicolumn{1}{c}{$f_i$} &
\multicolumn{1}{c}{$K_i$} &
\multicolumn{1}{c}{$\varphi_i$} \\
\hline
 $f_1$ & 6.591 & 3.57 & 0.896 & 6.589 & 3.31 & 0.059 \\
 &$\pm3$&$\pm11$&$\pm5$&$\pm1$&$\pm9$&$\pm4$\\
 $f_2$ & 0.659 & 1.60 & 0.452 & 0.670 & 1.37 & 0.231 \\
 &$\pm6$&$\pm11$&$\pm11$&$\pm3$&$\pm9$&$\pm10$\\
 $f_3$ & 0.840 & 0.80 & 0.213 & 0.872 & 1.57 & 0.704 \\
 &$\pm11$&$\pm11$&$\pm22$&$\pm3$&$\pm9$&$\pm9$\\
 $f_4$ & 5.993 & 0.41 & 0.331 & 6.019 & 0.47 & 0.584 \\
 &$\pm21$&$\pm11$&$\pm44$&$\pm8$&$\pm9$&$\pm29$\\
 \noalign{\smallskip}
\hline
\end{tabular}
\end{table}