\begin{table}%t7
%\centering
\par
\caption {\label{tabres1R}Same as Table \ref{tabres2R} for a frequency accuracy of 
0.3~$\mu$Hz.}
\begin{tabular}{cccc} \hline\hline
Nf of modes  & 20 & 40 & 60 \\
\hline
 $\delta R /R$  with $\delta \nu$ & 0.01 & $<$0.01 & $<$0.01\\
 $\delta R /R$  with $\delta_{\rm sls}$ & 0.025 & 0.015 & 0.01\\
\hline
\end{tabular}
%\vspace*{2mm}
 \end{table}