\begin{table}%t3
\caption{Summary of spectral type classification of stellar X-ray NEP sources.}
\protect{\label{tab:sp}}
%\centering
\small
\begin{tabular}{l r}
\hline \hline
Sp.Type & N. Obs.\\
\hline
A & 3\\
F-F5 & 10\\
F6-F9  & 8\\
G & 29\\
K & 53 \\
M & 41\\
\hline
Tot. & 144\\
\hline
\end{tabular}
\end{table}