\begin{table}%t3
\caption{\label{contrib}Mean power densities.}
%\centerline
 {\small \begin{tabular}{lcccccc}
\hline\hline\noalign{\smallskip}
& $f\ind{max}$ &\multicolumn{4}{c}{Mean power density at maximum $\Big($ppm$^2$\muHz$^{-1}\Big)$} & \\
Star  & (mHz)   & Total & Granulation & Noise & p~modes   & $\langle SNR \rangle$ \\
\hline
HD~49933 & 1.8 & 0.44 & 0.11 & 0.14 & 0.19 & 1.18 \\
HD~181420& 1.6 & 0.65 & 0.20 & 0.28 & 0.17 & 0.79 \\
HD~181906& 1.8 & 1.01 & 0.10 & 0.79 & 0.12 & 0.39 \\
%\hline
HD~175726& 2.0 & 0.41 & 0.05 & 0.31 & 0.05 & 0.37 \\ 
\hline
\end{tabular}}
\medskip
Contributions to the power density at the frequency where the seismic signal is maximum, and mean seismic signal-to-noise ratio for \cible, compared to other \corot\ targets.
\end{table}