\begin{table}%T8
%\centering
\small
\caption{Results from the Fourier analysis applied to the four {$uvby$} 
filters.\label{t8}}
\begin{tabular}{lrrrrrrrrrrrr}  \hline\hline
~ & \multicolumn{3}{c}{{\em ~~~~u}} & \multicolumn{3}{c}{{$v$}} &
\multicolumn{3}{c}{{\em b}} & \multicolumn{3}{c}{{$y$}} \\ \hline 
Frequency & $A$~~~ & $\varphi$~~ & {\it S/N} &$A$~~~ & $\varphi$~~ & {\it S/N} &
$A$~~~ & $\varphi$~~ & {\it S/N} &$A$~~~ & $\varphi$~~ & {\it S/N} \\
~~~(cd$^{-1}$)& (mmag) & (rad) & ~&(mmag) & (rad) & ~&
(mmag) & (rad) &~&(mmag) & (rad) &~\\ \hline
~ & $\pm$0.76 &~&~& $\pm$0.84 &~&~& $\pm$0.72 &~&~& $\pm$0.63 &~&~\\
$f_1$ =~2.1066 &11.64 &1.442 &7.3  &18.68 &1.565 &8.1 &16.56 &1.560 &8.5 &13.62&1.641 &9.4\\
~& ~&58&~& ~& 40&~& ~& 38&~& ~& 41&~\\ 
$f_2$ =~1.8694 &10.90 &1.645 &6.8  &16.27 &1.533 &7.1 &14.82 &1.586 &7.6 &11.67&1.631 &8.0\\
~& ~&66&~& ~& 49&~& ~& 46&~& ~& 51&~\\ 
$f_3$ =~2.2124 & 8.07 &4.478 &5.0  &12.60 &4.355 &5.5 &11.21 &4.342 &5.7 & 8.03&4.210 &5.5\\
~& ~&87&~& ~& 61&~& ~& 59&~& ~& 72&~\\ 
~&~&~&~&~&~&~&~&~&~&~&~&~\\
residuals & 10.5 & ~ &~& 11.5 & ~ &~& 9.8 & ~ &~& 8.6 & ~ &~\\
(mmag)&~&~&~&~&~&~&~&~&~&~&~&~\\
\hline
\end{tabular}
\end{table}