\begin{table}%t3
  \caption{\label{table:7}The cumulative angular density of sources in the broad bands.}
\small%\centerline
 {
\begin{tabular}{c c c c c }         
\hline\hline                
Flux &  ${N({>}S)}$ & ${N}$&  ${N({>}S)}$ & ${N}$\\
& 0.5--2 keV & & 2--10 keV \\
 (1) & (2) & (3) & (4) & (5) \\
\hline
 --14.84   &  605.7 $\pm$ 3.4$^*$&   31~837  &        --           &      --  \\
 --14.70   &  474.0 $\pm$ 2.7  &   31~465    &        --           &      --  \\
 --14.43   &  287.4 $\pm$ 1.7  &   27~944    &        --           &      --  \\
 --14.40   &  268.4 $\pm$ 1.6  &   27~119    &        --           &      --  \\
 --14.10   &  132.9 $\pm$ 1.0  &   16~715    &        --           &      --  \\
 --14.04   &  111.2 $\pm$ 0.9  &   14~283    &  315.6 $\pm$ 3.2$^*$&    9431 \\
 --13.85   &   65.9 $\pm$ 0.7  &    8674    &  181.2 $\pm$ 1.9    &    8911 \\
 --13.80   &   57.0 $\pm$ 0.7  &    7521    &  155.6 $\pm$ 1.7    &    8628 \\
 --13.50   &   21.7 $\pm$ 0.4  &    2871    &  54.0 $\pm$ 0.7    &    5443 \\
 --13.20   &    8.0 $\pm$ 0.2  &    1057    &  17.0 $\pm$ 0.4    &    2172 \\
 --12.90   &    3.0 $\pm$ 0.2  &     395    &  5.3  $\pm$ 0.2    &     704 \\
 --12.60   &    1.1 $\pm$ 0.1  &     138    &  1.6  $\pm$ 0.1    &     213 \\
 --12.30   &    0.4 $\pm$ 0.1  &      53    &  0.5  $\pm$ 0.1    &      55 \\
\hline                        
\end{tabular}}
\medskip
 (1)~Energy band flux in log units.
(2)~Cumulative angular density of sources in units of ${\rm deg^{-2}}$ above a given flux in the 0.5$-$2~keV energy band.
(3)~Number of sources above given flux in the 0.5$-$2~keV energy band.
(2)~Cumulative angular density of sources in units of ${\rm deg^{-2}}$ above a given flux in the 2$-$10~keV energy band.
(3)~Number of sources above given flux in the 2$-$10~keV energy band.
$^*$~Cumulative angular density of sources at the flux limits of our survey in the 0.5$-$2~keV and 2$-$10~keV bands.
\end{table}