\begin{table}%T6
\caption{\label{tablefreq}Frequencies detected from the analysis of 
different lines using the RLC method for the 2001~data.
The frequencies obtained with the LS method are shown in boldface.}
%\centering
\par
\begin{tabular}{@{\ }l l@{\ \ }l@{\ \ }l@{\ \ }l@{\ }}
\hline           
\hline
Line                 & \multicolumn{4}{l}{Frequencies (c~d$^{-1}$)}    \\
                     & $f_1$ & $f_2$ & $f_3 \sim 2f_{\rm rot}$  & $f_4 \sim f_{\rm rot}$ \\
\hline
$\ion{He}{i}$ 4713   & 7.15/\bf{7.15}&6.86/\bf{6.83}&0.50/\bf{0.55}&0.27/\bf{0.29}\\
$\ion{He}{i}$ 4921   & 7.14/\bf{7.15}&     \bf{6.83}&0.50/\bf{0.55}&0.28/\bf{0.28}\\
$\ion{He}{i}$ 5016   & 7.14/\bf{7.15}&6.82/\bf{6.83}&0.51/\bf{0.55}&0.27/\bf{0.29}\\
$\ion{He}{i}$ 5876   & 7.14/\bf{7.15}& 6.84         &0.50/\bf{0.55}&0.27/\bf{0.22}\\
$\ion{Si}{iii}$ 4553 & 7.14/\bf{7.15}& 6.81         &0.50/\bf{0.55}&0.25/\bf{0.29}\\
\hline
\end{tabular}
\end{table}