\begin{table}%t2
\caption{Statistics of the field-star decontamination discriminated by magnitude bins.}
\label{tab2}
%\small\centerline
 {
\begin{tabular}{ccccccccccc}
\hline\hline
$\Delta\jj$&\multicolumn{5}{c}{FSR~1716 ($R<3\arcmin$)}&\multicolumn{5}{c}{Cz~23 ($R<4\arcmin$)}\\
\hline%\cline{3-7}\cline{10-14}
 &\no&\nc&\ns&\sFS&\fsU& \no&\nc&\ns&\sFS&\fsU\\
(mag)&(stars)&(stars)&&(stars)&&(stars)&(stars)&&(stars)\\
\hline%\cline{1-14}
  7--8&$1\pm1.0$  &1 &1.0&0.20&0.36& ---&---&---&---&---    \\
    8--9&$1\pm1.0$  &1 &1.0&0.38&0.23& ---&---&---&---&---    \\
   9--10&$3\pm1.7$  &1 &0.6&0.37&0.08& $2\pm1.4$   &1 &0.7&0.47&0.63    \\
 10--11&$11\pm3.3$ &3 &0.9&0.81&0.07& $7\pm2.6$   &6 &2.3&0.91&0.38 \\
11--12&$37\pm6.1$ &9 &1.5&1.90&0.07& $1\pm1.0$   &0 &0.0&1.08&0.22 \\
12--13&$82\pm9.1$ &20&2.2&3.23&0.05&$10\pm3.2$  &2 &0.6&1.50&0.15  \\
13--14&$145\pm12.0$&36&3.0&6.33&0.05&$24\pm4.9$  &5 &1.0&2.33&0.11  \\
14--15&$248\pm15.7$&57&3.6&8.45&0.04&$66\pm8.1$  &22&2.7&3.77&0.08  \\
15--16&---&---&---&---&---&          $118\pm10.9$&30&2.8&5.61&0.07  \\
\hline%\cline{3-7}\cline{10-14}
All &$528\pm23.0$&128&5.0&19.2&0.04&$228\pm15.1$&66&4.4&15.6&0.07 \\
\hline
\end{tabular}}
\medskip
Notes. The table provides, for each magnitude bin ($\Delta\jj$), the number of observed stars~(\no) within the spatial region sampled in the CMDs shown in the top panels of Figs.~\ref{fig3} 
and~\ref{fig4}, the respective number of probable member stars~(\nc) computed by the 
decontamination algorithm, the \ns~parameter, the $1\sigma$~Poisson fluctuation~(\sFS) around 
the mean, with respect to the star counts measured in the 8~sectors of the comparison field, and the field-star uniformity parameter. The statistical significance of \nc\ is reflected in its ratio with the $1\sigma$~Poisson fluctuation of \no\ (\ns) and with \sFS. The bottom line corresponds to the  
full magnitude range.
\end{table}