\begin{table}%t6
%\centering
\par
\caption{\label{t:abunao}Abundances of~O and~Na for the 1409~stars with only GIRAFFE spectra in 15~GCs. The complete table is available only in electronic form at CDS.}
\small \begin{tabular}{rrcccccccc}
\hline\hline
GC & Star     & $nr$ &[O/Fe]& rms  &  $nr$ &[Na/Fe] &rms &HR & lim \\    
\hline                                                           
 NGC~104 &  1389 & 2  &  0.395& 0.069	& 2  & +0.175 &0.011 & 1 & 1\\ 
 NGC~104 &  2608 & 1  & --0.207& 	& 4  & +0.615 &0.078 & 2 & 1\\ 
 NGC~104 &  2871 &    &       & 	& 2  & +0.440 &0.062 & 3 & 1\\ 
 NGC~104 &  4373 & 1  &  0.430& 	& 4  & +0.249 &0.135 & 2 & 1\\ 
 NGC~104 &  5172 & 2  &  0.189& 0.002	& 4  & +0.489 &0.072 & 2 & 1\\ 
\hline
\end{tabular}
\end{table}