\begin{table}%t10
%\centering
\par
\caption{\label{def_denis_flag}Definition of the DENIS image quality flags.}
\begin{tabular}{cccccc}
\hline\hline
\multicolumn{6}{c}{ \hspace{-1.5cm}~Mag. range \hspace{2.0cm} Sigma range}\\
Flag &     &0&1&2&3\\
\hline
$I$ & 11--16 & $>$0.15 & 0.1--0.15 & 0.07--0.1  & $<$0.07  \\
$J$ & 9--14 & $>$0.20 & 0.16--0.20 & 0.13--0.16 & $<$0.13 \\
$K_{\rm s}$ & 7--12 & $>$0.20 & 0.16--0.20 & 0.13--0.16 & $<$0.13 \\  
\hline
\end{tabular}
\end{table}