\begin{table}%t7
\caption{\label{tab7}Frequencies found in the bisector data using a pre-whitening 
procedure. }
%\centering
\begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
Frequency   &  Amplitude &   Comment  \\
(c~d$^{-1}$)        &       (m~s$^{-1}$)&  \\
\hline
0.0432   &  4.21 & $f_{\rm rot}$ \\
0.0905   &  2.81 & $f_4$   \\
0.0667   &  3.00 &  \\
\hline
\end{tabular}
\end{table}