\begin{table}%t3
\caption{\label{tab:summary}Number and density of {\it detections} as a function of $S/N$.}
\par
%\centering
\small
\begin{tabular}{ccc}
\hline\hline\noalign{\smallskip}
SExtractor threshold & Number of $\it detections$ & Density of $\it detections$ \\
 &  &  deg$^{-2}$ \\
\hline
2 & 535 & 19.2 \\
3 & 262 & 9.4 \\
4 & 170 & 6.1 \\
5 & 98 & 3.4 \\
6 & 135 & 4.8 \\
\hline
\end{tabular}
\vspace*{-3mm}
\end{table}