\begin{table}%t2
%\centering
\par
\caption{\label{tab_icm}Properties of the projected gas distribution as inferred from the \mbox{X-ray} analysis. }
$$
\begin{tabular}[c]{lr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}l}
\hline\hline\noalign{\smallskip}
Component & \multicolumn{2}{c}{Mass scale} & \multicolumn{2}{c}{$\theta_{1,0}$} & \multicolumn{2}{c}{$\theta_{2,0}$}& \multicolumn{2}{c}{$\epsilon$}
&\multicolumn{2}{c}{$\theta_\epsilon$} & \multicolumn{2}{c}{Length scale}&\multicolumn{2}{c}{$\beta$} \\
        \noalign{\smallskip}
        & \multicolumn{2}{c}{} & \multicolumn{2}{c}{($\arcsec$)} &\multicolumn{2}{c}{($\arcsec$)} & \multicolumn{2}{c}{} &
\multicolumn{2}{c}{($\deg$) }
&\multicolumn{2}{c}{($\arcsec$)}&\multicolumn{2}{c}{}\\
        \noalign{\smallskip}
        \hline
         Main Clump & $0.100$&$0.008$& $3.7$&$1.0$ & $8.7$&$1.0$ & $0.39$&$0.05$ & $-13$&$4$ & $3.6$&$1.0$ & $0.389$&$0.007$\\
        \noalign{\smallskip}
        Southern Tail & $0.033$&$0.006$& $-23.4$&$1.0$ & $-37.6$&$1.0$ & $0.50$&$0.02$ & $-37$&$2$ & $170$&$40$ & $1.8$&$1.0$\\
                \hline
\end{tabular}
$$
\tablefoot{Each component was modelled as an isothermal $\beta$-ellipsoid.}
\end{table}