\begin{table}%t2
\caption{\label{periods}Possible solutions for periodicity and their properties.}
\small%\centerline
 {
\begin{tabular}{c|cccc|ccc|cc}
\hline \hline
&&&&&&&&& \\[-8pt]
Solution & $f_{\rm WPDM}$$^a$ & $f_{\rm HF}$$^b$ & $f$$^c$ & $P$$^d$ & $M$$^e$ & $f_{\rm fit}$$^f$ & $\sigma$$^g$ & $A$$^h$ & $S/N^i$
\\
 & [h$^{-1}$] & [h$^{-1}$] & [h$^{-1}$] & [h] &   & [h$^{-1}$] &  &  & \\
\hline
A  & $0.07372 \pm 0.00004$ & $0.07370 \pm 0.00003$ & $0.07371 \pm 0.00004$ &  $13.567 \pm 0.007$ & 4 & 0.07372 & 0.19 & 2.164 & 3.524 \\
B & $0.08428 \pm 0.00008$ & $0.08424 \pm 0.00004$ & $0.08426 \pm 0.00006$ &  $11.868 \pm 0.009$ &   &         &      & 2.132 & 3.188 \\
C & $0.08512 \pm 0.00008$ & $0.08504 \pm 0.00005$ & $0.08508 \pm 0.00007$ &  $11.754 \pm 0.009$ &   &         &      & 2.389 & 3.706 \\
D  & $0.09832 \pm 0.00007$ & $0.09826 \pm 0.00005$ & $0.09829 \pm 0.00006$ &  $10.174 \pm 0.006$ & 3 & 0.09829 & 0.01 & 1.921 & 2.707 \\
E  & $0.14742 \pm 0.00016$ & $0.14758 \pm 0.00012$ & $0.14750 \pm 0.00014$ & $~~6.780 \pm 0.006$ & 2 & 0.14743 & 0.48 & 1.694 & 1.975 \\
F  & $0.29474 \pm 0.00024$ & $0.29480 \pm 0.00019$ & $0.29477 \pm 0.00021$ & $~~3.392 \pm 0.002$ & 1 & 0.29487 & 0.46 & 1.644 & 1.953 \\
G & $0.29862 \pm 0.00022$ & $0.29860 \pm 0.00020$ & $0.29861 \pm 0.00021$ & $~~3.349 \pm 0.002$ &   &         &      & 1.560 & 1.669 \\
H & $0.33128 \pm 0.00015$ & $0.33112 \pm 0.00012$ & $0.33120 \pm 0.00014$ & $~~3.019 \pm 0.001$ &   &         &      & 1.626 & 1.930 \\
\hline
\end{tabular}}
\medskip
%$^a$ The red and blue fonts indicate the system and the other solutions respectively; 
$^a$~$N_{\rm b} = 25$, $N_{\rm c} = 5$;
$^b$~$N_{\rm f} = 5$; 
$^c$~unweighted-mean result from both methods with an effective error;
$^d$~corresponding period with an error;
$^e$~period multiple for the system, $M = 1$ indicates the base of the system;
$^f$~frequency expected for an ideal system, given by an unweighted linear fit to the dependence
of~$f$ on~$M$; 
$^g$~deviation of frequency~$f_{\rm fit}$ from~$f$, given as a fraction of the error on~$f$;
$^h$~amplitude (see Sect.~\ref{rotcon} and Fig.~\ref{Fig8});
$^i$~signal-to-noise ratio (see Sect.~\ref{rotmet} and Fig.~\ref{Fig8}). 
\vspace*{5mm}
\end{table}