\begin{table}%t3
%\centering
\par
\caption{\label{tab-spec}Results obtained by fitting a power-law spectrum to the \xmm\ data of \msh.}
\begin{tabular}{lcccc}
\hline\hline
\noalign{\smallskip}
\multicolumn{1}{c}{Ring} &
\multicolumn{1}{c}{$\Gamma$} &
\multicolumn{1}{c}{Flux} &
\multicolumn{1}{c}{Surface Brightness} &
\multicolumn{1}{c}{$\chi^{2}/{\rm d.o.f.}$}\\
\multicolumn{1}{c}{No.} &
\multicolumn{1}{c}{} & 
\multicolumn{1}{c}{(\ergcm{-12})} &
\multicolumn{1}{c}{(\ergcm{-17}$~{\rm arcsec}^{-2}$)} & 
\multicolumn{1}{c}{}\\
\hline
1 & $1.66 \pm 0.02$ & $12.0 \pm 0.3$ & $162 \pm 4.5$ & $147/161$\\
2 & $1.78 \pm 0.03$ & $10.0 \pm 0.3$ & $92 \pm 3.0$ & $161/147$\\
3 & $1.88 \pm 0.02$ & $2.9 \pm 0.07$ & $9.2 \pm 0.2$ & $431/459$\\
4 & $1.96 \pm 0.02$ & $3.1 \pm 0.09$ & $6.1 \pm 0.2$ & $356/536$\\
5 & $2.07 \pm 0.05$ & $2.4 \pm 0.1$ & $3.4 \pm 0.2$ & $97/156$\\
6 & $2.24 \pm 0.28$ & $0.4 \pm 0.2$ & $0.5 \pm 0.3$ & $62/107$\\
\hline
\end{tabular}
\end{table}