\begin{table}%t1
\caption {\label{tab1}Frequency and amplitude of identified modes.}
%\centerline
 {\begin{tabular}{ccccc}
\hline
\hline
\noalign{\smallskip}
Degree  & Frequency & Mode height & $S/N$ & Amplitude \\
$\ell$ & $\mu$Hz &ppm$^2$ * 1000/$\mu$Hz& & ppm \\
\hline
0  & 20.94 (7)& 7.8&  10.8&79~$\pm$~15\\
0  & 24.20 (7)& 10.0& 17.6&89~$\pm$~15\\
0 & 27.65  (6)& 11.3& 24.8&94~$\pm$~16\\
0 & 31.08  (6)& 9.0&  23.7&84~$\pm$~14\\
0 & 34.59  (7)& 4.6&  14.0&60~$\pm$~11\\
0 & 38.17  (9)& 1.6 & 5.6&35 ~$\pm$~8\\
1  & 19.16 (7)& 5.3&  6.2&65~$\pm$~14\\
1  & 22.59 (7)& 5.5&  8.6&66~$\pm$~13\\
1  & 25.94 (5)& 16.8& 33.1&115~$\pm$~19\\
1 & 29.45  (5)& 16.0& 38.8&112~$\pm$~18\\
1 & 32.88  (5)& 9.1&  26.0&85~$\pm$~14\\
1 & 36.41  (6)& 4.4&  14.6&59~$\pm$~11\\
1 & 39.93  (6)& 2.3 & 8.8&43 ~$\pm$~9\\
2  & 20.19 (8)& 6.5&  8.4&71~$\pm$~14\\
2  & 23.58 (7)& 6.5&  10.9&71~$\pm$~13\\
2  & 26.88 (7)& 6.5&  13.7&72~$\pm$~13\\
2 & 30.48  (6)& 9.5&  24.1&86~$\pm$~15\\
2 & 33.91  (8)&  2.3& 7.0&43~$\pm$~9\\
2 & 37.68  (8)&  2.1& 7.3&41~$\pm$~8\\
\hline
\end{tabular}}
\smallskip
\tablefoot{The uncertainties in the last given digit of the frequencies are noted in parentheses. For the $S/N$~estimates
(see Barban et~al. \cite{barban2}), the signal is
taken to be the height of the fitted Lorentzian profile and the noise is determined according to the procedure described in Sect.~\ref{nb}.}
\end{table}