\begin{table}%t3
%\centering
\par
\caption{Compatibility, as obtained  using the $Z^2$ statistical test, of the observed MACHO distribution of Einstein crossing times and those of the different simulated populations.}\label{tab3}
\small \begin{tabular}{lccccc}
&\multicolumn{3}{c}{$Z ^2$ Compatibility test}&&\\
\hline \hline  
Magnitude        & $ 17.5^{\rm  mag}$ & $ 22.5^{\rm  mag}$ & $ 25.0^{\rm mag}$ & $ 27.5^{\rm mag}$ & $ 30.0^{\rm mag}$ \\ 
\cline{2-6}
Red dwarfs       & 0.58             & 0.67               & 0.65                & 0.55              & 0.40              \\
CO white dwarfs  & 0.61             & 0.70               & 0.80                & 0.87              & 0.90              \\
ONe white dwarfs & 0.76             & 0.55               & 0.68                & 0.68              & 0.72              \\
Whole population & 0.59             & 0.69               & 0.75                & 0.82              & 0.89              \\
\hline
\end{tabular}
\end{table}