\begin{table}%t2
\caption{Frequencies and amplitudes in the Str\"{o}mgren $v$ and $y$~filters. The corresponding empirically derived pulsational constants~$Q$. The formal errors of the observed frequencies are between 1.82~$\times$ 10$^{-6}$ and 1.84~$\times$ 10$^{-4}$~cd$^{-1}$. }
\label{table2}
%\centering
\small
\begin{tabular}{ccc|cccccc|ccc}
\hline\hline
 \multicolumn{2}{c}{Frequency}& $Q$& \multicolumn{6}{c|}{Amplitude [mmag]}& \multicolumn{3}{c}{Phase differences in degrees}\\
  \multicolumn{2}{c}{[cd$^{-1}$]} &[days]& \multicolumn{2}{c}{2000/01} & \multicolumn{2}{c}{2001/02} & \multicolumn{2}{c|}{2002/03}& \multicolumn{3}{c}{$\Phi_v -\Phi_y$}\\
\cline{4-9}
   &        &         & $v$&$y$&$v$&$y$&$v$&$y$& 2000/01 & 2001/02 & 2002/03\\
   &        &        & $\pm$0.06&$\pm$0.07&$\pm$0.15&$\pm$0.12&$\pm$0.17&$\pm$0.13&&&\\
\cline{1-12}
$f_1$	&	6.8980	& 0.0338 &	39.63	&	27.16	&	39.51	&	27.27	&	39.52	&	27.05	&	2.90	$\pm$	0.19	&	3.63	$\pm$	0.34	&	2.98	$\pm$	0.38	\\
$f_2$	&	7.0060	& 0.0332 &	19.12	&	13.23	&	17.20	&	12.15	&	14.01	&	9.01	&	--1.6	$\pm$	0.4	&	--1.9	$\pm$	0.8	&	--2.0	$\pm$	1.1	\\
$f_3$	&	9.1175	& 0.0255 &	16.82	&	11.49	&	21.02	&	14.57	&	17.85	&	11.99	&	--2.1	$\pm$	0.4	&	--2.5	$\pm$	0.6	&	--1.1	$\pm$	0.8	\\
$f_4$	&	11.5196	& 0.0202 &	18.08	&	12.62	&	16.56	&	11.79	&	16.43	&	11.4	&	--2.0	$\pm$	0.4	&	--1.7	$\pm$	0.8	&	--2.2	$\pm$	0.9	\\
$f_5$	&	8.9606	& 0.0260 &	13.82	&	9.57	&	13.73	&	9.32	&	13.12	&	8.85	&	2.1	$\pm$	0.5	&	2.3	$\pm$	1.0	&	0.2	$\pm$	1.1	\\
$f_6$	&	9.5613	& 0.0244 &	10.91	&	7.47	&	18.62	&	12.92	&	20.56	&	13.67	&	--0.7	$\pm$	0.8	&	0.5	$\pm$	0.7	&	--2.3	$\pm$	1.1	\\
$f_7$	&	7.3034	& 0.0319 &	6.82	&	4.66	&	5.46	&	3.76	&	7.50	&	5.38	&	--8.1	$\pm$	1.1	&	--6.8	$\pm$	2.6	&	--13.7	$\pm$	1.9	\\
$f_8$	&	6.7953	& 0.0343 &	3.65	&	2.58	&	4.83	&	3.27	&	3.76	&	2.83	&	--7.9	$\pm$	2.0	&	--9.9	$\pm$	2.7	&	--10.8	$\pm$	3.7	\\
$f_9$	&	9.5801	& 0.0243 &	2.02	&	1.36	&	3.64	&	2.25	&	4.65	&	3.12	&	--8	$\pm$	4	&	--3	$\pm$	4	&	--12	$\pm$	4	\\
$f_{10}$	&	6.3390	& 0.0367 &	2.45	&	1.81	&	2.08	&	1.62	&	3.11	&	1.99	&	--1	$\pm$	3	&	4	$\pm$	6	&	--28	$\pm$	5	\\
$f_{11}$	&	8.6394	& 0.0270 &	2.14	&	1.60	&	1.71	&	1.45	&	1.61	&	1.38	&	--7	$\pm$	3	&	--6	$\pm$	7	&	1	$\pm$	8	\\
$f_{12}$	&	11.2946	& 0.0206 &	0.88	&	0.56	&	1.35	&	0.92	&	1.28	&	1.18	&	--4	$\pm$	9	&	--3	$\pm$	10	&	12	$\pm$	10	\\
$f_{13}$	&	12.6967	& 0.0183 &	0.58	&	0.39	&	0.24	&	0.52	&	0.66	&	0.31	&	13	$\pm$	9	&	28	$\pm$	27	&	31	$\pm$	28	\\
2$f_1$	&	13.7962	& &	1.68	&	1.28	&	1.58	&	1.18	&	1.02	&	0.61	&	&	\\
$f_1$+$f_2$	&	13.9040	& &	1.33	&	0.93	&	1.45	&	1.02	&	1.46	&	0.98	&	&	\\
2$f_2$	&	14.0120	& &	1.07	&	0.68	&	0.40	&	0.50	&	0.91	&	1.04	&	&	\\
$f_1$+$f_5$	&	15.8586	& &	1.23	&	0.78	&	1.16	&	1.02	&	1.01	&	0.91	&	&	\\
$f_1$+$f_3$	&	16.0155	& &	1.35	&	0.88	&	1.63	&	1.29	&	0.85	&	0.79	&	&	\\
$f_2$+$f_3$	&	16.1235	& &	0.37	&	0.27	&	0.79	&	0.85	&	0.38	&	0.19	&	&	\\
$f_1$+$f_6$	&	16.4593	& &	0.47	&	0.39	&	1.25	&	0.66	&	0.91	&	1.12	&	&	\\
$f_2$+$f_6$	&	16.5673	& &	0.53	&	0.39	&	0.65	&	0.32	&	0.59	&	0.31	&	&	\\
$f_4$+$f_8$	&	18.3149	& &	0.74	&	0.65	&	1.11	&	0.48	&	0.75	&	0.48	&	&	\\
$f_1$+$f_4$	&	18.4177	& &	1.67	&	1.12	&	1.69	&	1.10	&	1.18	&	1.11	&	&	\\
$f_2$+$f_4$	&	18.5256	& &	0.89	&	0.60	&	1.14	&	0.96	&	0.40	&	0.43	&	&	\\
$f_4$+$f_5$	&	20.4802	& &	1.50	&	1.33	&	1.22	&	0.94	&	1.67	&	0.89	&	&	\\
$f_3$+$f_4$	&	20.6371	& &	0.49	&	0.36	&	0.91	&	0.81	&	1.01	&	0.43	&	&	\\
$f_4$+$f_6$	&	21.0809	& &	0.70	&	0.57	&	0.77	&	0.46	&	0.74	&	0.55	&	&	\\
2$f_4$	&	23.0392	& &	1.07	&	0.78	&	1.12	&	0.78	&	0.86	&	0.69	&	&	\\
2$f_4$+$f_1$	&	29.9373	& &	0.58	&	0.43	&	0.57	&	0.35	&	0.36	&	0.25	&	&	\\
\hline
\end{tabular}
\end{table}