\begin{table}%t2
%\centering
\par
\caption {The list of frequencies considered to be intrinsic to $\gamma$~Equ. {$\sigma_{\rm f}$:} 1$\sigma$-uncertainty in frequency, derived according to \citet{kallinger}; {$\sigma_{\rm a}$:} uncertainty in amplitude; {\sc sig}: spectral significance according to \citet{piet07}; {$\theta$:} phase in radians corresponding to $\cos(2\pi f_i t - \theta )$.\label{tab:freqlist}}
\begin{tabular}{c c c c c c c}
\hline 
\hline
\noalign{\smallskip}
      & {$f$}&{$\sigma_{\rm f} \times  10^6$} &{$a$} &{$\sigma_{\rm a}$} &{$\sc sig$}& {$\theta$} \\
      & mHz &  mHz & ppm & ppm & & \\
\hline 
$f_{\rm{1}}$ & 1.364594 &  6  & 362 & 2.9 & 963 & 2.7704 \\
$f_{\rm{2}}$ & 1.365411 & 13  & 124 & 2.4 & 175 & 2.6594 \\
$f_{\rm{3}}$ & 1.427102 & 34  &  43 & 2.1 &  25 & 1.8325 \\
$f_{\rm{4}}$ & 1.388872 & 44  &  32 & 2.1 &  15 & 1.3636 \\
$f_{\rm{5}}$ & 1.310914 & 51  &  27 & 2.1 &  11 & 2.7173 \\
$f_{\rm{6}}$ = 2$f_{\rm{1}}$ & 2.729148 & 32  &  44 & 2.1 &  27 & 2.0870 \\
$f_{\rm{7}}$ = 3$f_{\rm{1}}$ & 4.094687 & 70 &  18 & 3.7 &    6 &  3.1012 \\
\hline
\end{tabular}
\end{table}