\begin{table}%t5
\caption{\label{tab5}Frequencies found in data Subset~3.}
%\centering
\begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
Frequency   &  Amplitude   \\
(c~d$^{-1}$)    &  (m~s$^{-1}$)    & \\
\hline 
0.0447   & 12.80 $\pm$ 0.61 & $f_{\rm rot}$  \\
0.1108   &  5.08 $\pm$ 0.57  & $f_{3}$  \\
0.2707   &  5.87 $\pm$ 0.44 & $f_{2}$   \\
1.1716   &  6.10 $\pm$ 0.41 & $f_{1}$    \\
0.080    &  4.02 $\pm$ 0.70&  \\
\noalign{\smallskip}
$\sigma$ = 1.99~m~s$^{-1}$ & \\
\hline
\end{tabular}
\end{table}