\begin{table}%T11
%%\centering
\par
\caption{\label{mainresults}Frequency search and mode identification. Summary of the main results for the dominant frequencies of each component.}
\small%\centerline
{
\begin{tabular}{cccc}
\hline\hline
\multicolumn{4}{c}{Primary component} \\ 
\noalign{\smallskip}
              & d$^{-1}$ & Identification FPF  & Identification$^{{b}}$ F2D \\
              \hline\noalign{\smallskip}
              &                 &     best$^{{a}}$ ($\ell$, $m$)    &   \\
 ~~~~~ $f_1$ ~~~~~~ &   21.11 & (11, 11), (11, 9), (10, 6) &  $\ell$ = 8$-$10\\ 
  $f_2$  & 30.38  &   (10, 6), (9, 5), (11, 7) & \\
  \hline 
  \multicolumn{4}{c}{Secondary component} \\ 
\noalign{\smallskip}
              & d$^{-1}$ & Identification FPF  & Identification$^{{b}}$ F2D \\\hline
                             &                 &     best$^{{a}}$ ($\ell$, $m$)    &   \\
  $f_1$  &  12.81  &  (2, 1), (2, 2) &  $\ell$ =  2 or 3\\ 
  $f_{2b}$  &  19.11  & (13, 5), (10, 5) &  $\ell$ = 0\\
  $f_3$  &  24.56  & (6, 3), (6, 5) & \\   \hline
\end{tabular}}
\smallskip
$^{{a}}$ The ($\ell$, $m$) couples indicated for the FPF method correspond to the best identification, in decreasing order. \\
$^{{b}}$ For each of the frequencies detected by the FPF method, we identified an $\ell$ value as detected by the F2D method.
\end{table}