\begin{table}%t1
\caption{\label{table:abb}Abundances obtained by fitting the four selected regions shown in Fig.~\ref{fig:lowhigh}. }
%\centerline
 {\small 
\begin{tabular}{lcccc}
\hline\hline
Par. & 1 & 2 & 3 & 4 \\
\hline
$N_H$ & $4.01 \pm 0.08$ & $3.95 \pm 0.09$ & $4.01 \pm 0.11$ & $4.08 \pm 0.12$ \\
$kT$    & 5.919 $\pm$ 0.035 & 6.157 $\pm$ 0.053 & 6.516 $\pm$ 0.068 & 5.050 $\pm$ 0.049 \\
O     & 0.34 $\pm$ 0.05 & 0.26 $\pm$ 0.06 & 0.30 $\pm$ 0.07 & 0.40 $\pm$ 0.07 \\
Si    & 0.43 $\pm$ 0.07 & 0.37 $\pm$ 0.08 & 0.35 $\pm$ 0.07 & 0.52 $\pm$ 0.08 \\
S     & 0.18 $\pm$ 0.10 & 0.21 $\pm$ 0.10 & 0.12 $\pm$ 0.10 & 0.22 $\pm$ 0.10 \\
Ar    & 0.28 $\pm$ 0.11 & 0.27 $\pm$ 0.18 & 0.24 $\pm$ 0.20 & 0.36 $\pm$ 0.20 \\
Fe    & 0.306 $\pm$ 0.009 & 0.288 $\pm$ 0.010 & 0.275 $\pm$ 0.014 & 0.369 $\pm$ 0.013 \\
\hline\noalign{\smallskip}
$\chi^{2}_{\rm Red}$ & 1.58 & 1.19 & 1.23 & 1.23 \\
\noalign{\smallskip}\hline\noalign{\smallskip}
\end{tabular}}
\medskip
Temperatures are given in keV, $N_H$ in 10$^{20}$~cm$^{-2}$ and abundances are given with respect to solar. All errors quoted are at the~68\% level for one interesting parameter ($\Delta {\chi}^2 = 1$).
\end{table}