\begin{table}%t3
%\centering
\par
\caption{Fits results. Column~(1): cluster name; Col.~(2): slope parameter of the $\beta$-model; Cols.~(3,~4): scale radius in arcsec and in $h_{\rm 70}^{-1}$ kpc of the $\beta$-model; Col.~(5): electron number density of the central region calculated by means of the $\beta$-model; Col.~(6): slope parameter of the S\'{e}rsic fit; Cols.~(7,~8) scale radius in arcsec and in $h_{\rm 70}^{-1}$ kpc of the S\'{e}rsic model; Col.~{9} electron number density of the central region calculated by means of the S\'{e}rsic model.\label{fitsinfo}}
\begin{tabular}{c c c c cc c c c}
\hline\hline
&\multicolumn{4}{c}{$\beta$-model}& \multicolumn{4}{c}{S\'{e}rsic} \\
\cline{2-9}
Cluster & $\beta$ & $r_{\rm c}$ &  $r_{\rm c}$ & $n_{0}$& $\nu$ & $a^{\prime}$ & $a^{\prime}$& $n_{0}$ \\
         &             & (arcsec)    & ($h_{\rm 70}^{-1}$ kpc)   & ${\rm cm}^{-3}$   &  & (arcsec)  & ($h_{\rm 70}^{-1}$ kpc)  & ${\rm cm}^{-3}$  \\
\hline
%A267  & 0.769  $\pm$ 0.020  & 62.1   $\pm$ 1.7  & 229.2 $\pm$ 6.4  & 1.47   $\pm$ 0.023  & 55.28   $\pm$ 0.51   & 203.9  $\pm$ 1.9 \\
A496  & 0.410  $\pm$ 0.015 & 23.48  $\pm$ 0.28 & 15.48 $\pm$ 0.18 & 0.084& 0.390  $\pm$ 0.046 & 3.6  $\pm$ 0.23   & 2.37   $\pm$ 0.15  &0.036 \\
A1689 & 0.550  $\pm$ 0.025 & 25.72  $\pm$ 0.23 & 79.16 $\pm$ 0.71 & 0.065 & 0.650  $\pm$ 0.030  & 12.78 $\pm$ 0.16 & 39.32 $\pm$ 0.48 & 0.012 \\
A2050 & 0.43   $\pm$ 0.028  & 10.22   $\pm$ 0.73  & 22.0 $\pm$ 1.5 & 0.026 & 1.285 $\pm$ 0.047  & 15.33   $\pm$ 0.32    & 56.4  $\pm$ 1.2 & 0.010\\
A2631 & 0.732  $\pm$ 0.073  & 21.2   $\pm$  2.5$\pm$   & 82.6    $\pm$ 9.6  &  0.051 & 1.001  $\pm$ 0.066  & 14.9  $\pm$ 1.2   & 58.0  $\pm$ 4.7 & 0.013 \\
A2667 & 0.660  $\pm$ 0.017 & 30.8  $\pm$ 1.9 & 113.25  $\pm$ 6.99  & 0.039 & 0.570 $\pm$ 0.034 & 6.3    $\pm$ 1.5   & 23.1   $\pm$  5.4 & 0.022\\
\hline	
\end{tabular}  
\end{table}