\begin{table}%t6
\par
\caption{\label{freq_tab}Results of Fourier analysis.}       % title of Table
%\centerline
 {\begin{tabular}{llllll}
\hline\hline                 % inserts double horizontal lines
F$n$&Frequency  &Amplitude& Phase& $S/N$ & Remark\\ 
& (d$^{-1}$) &  ($10^{-3})$ & \\
\hline
F1&	0.273444                    &    $0.452    \pm 0.002$$^a$  &   $0.3848 \pm 0.0006$ & & $f_{\rm orb}$, fixed \\
F2&	$0.5470  \pm 0.0002$&	 $0.284   \pm 0.002$ &	$0.840 \pm 0.001$	&14.2 &  $\simeq$$ 2 f_{\rm orb}$\\
F3&	$2.1858 \pm 0.0004$&	 $0.120   \pm 0.002$ &	$0.349 \pm 0.002 $	&12.0 & $\simeq$$ 8 f_{\rm orb}$\\
F4&	$3.5534 \pm 0.0004$&	 $0.111   \pm 0.002$ &	$0.822 \pm 0.003 $	&11.2   & $\simeq$$ 13 f_{\rm orb}$\\
F5&	$1.0894 \pm 0.0004$&	 $0.097   \pm 0.002$ &	$0.840 \pm 0.003 $	& 6.2 & $\simeq $$4 f_{\rm orb}$\\
F6&	$0.0631 \pm 0.0004$&	 $0.116   \pm 0.002$ &	$0.931 \pm 0.003 $	&7.2   &   long term trend\\
F7&	$0.8206 \pm 0.0005$&	 $0.091   \pm 0.002$ &	$0.570 \pm 0.003 $	&7.8   & $\simeq $$3 f_{\rm orb}$\\
\hline 
\end{tabular}}
\par
\smallskip
$^a$ {All uncertainties are the fit formal  errors from Period04.}
\end{table}