\begin{table}%t6
%\centering
\par
\caption{Best fit parameters to RGS spectra in the 0.5--1.3~keV range
  recorded in revolutions 107 (upper table) and 200 (lower table)
  using a three components VMEKAL model. The temperature of each
  component were frozen to the value derived from the analysis of~EPIC
  data (see Table~\ref{tab5}). The metallicity was left free to vary. The
  oxygen and neon abundances were first tied to the abundance of the
  other elements (MODEL~A). There were then left free to vary
  independently but with the same value for the different temperature
  components (MODEL~B). In MODEL~C, the hottest temperature component
  has been replaced by a VMEKAL component at $4 \times 10^{6}$~K
  where the Ne~IX~line is formed.\label{tab6}}
\par
\begin{tabular}{c   c   c c c }
\hline
\hline
Rev.107 & Parameter & MODEL A & MODEL B & MODEL C \\
\hline
    & $kT_{\rm 1}$ (keV) & 0.65 & 0.65 & 0.65 \\
    & $EM_{\rm 1}$ (10$^{52}$~cm$^{-3}$) & 57 $\pm$ 17 & 52 $\pm$ 13 & 41 $\pm$ 15   \\
    & $kT_{\rm 2}$ (keV) & 1.38 & 1.38 & 1.38 \\
    & $EM_{\rm 2}$ (10$^{52}$~cm$^{-3}$) & 366 $\pm$ 44 & 342 $\pm$ 41 & 399 $\pm$ 13   \\
VMEKAL    & $kT_{\rm 3}$ (keV) & 3.7 & 3.7 & 0.34 \\
    & $EM_{\rm 3}$ (10$^{52}$~cm$^{-3}$) & 85 $\pm$ 68 & 81 $\pm$ 65 & 55 $\pm$ 15   \\
(3 components)    & O          & 0.11 & 0.18 $\pm$ 0.03 & 0.10 $\pm$ 0.01 \\
    & Ne         & 0.11 & 0.52 $\pm$ 0.09 & $0.35\pm0.05$ \\
    & Other abundances   & $0.11\pm0.03$ & $0.11\pm0.02$ & 0.11 $\pm$ 0.01 \\
%\hline
    & $\chi^{2}$ & 1.33 (549/413 d.o.f.) & 1.24 (509/411 d.o.f.) &
    1.14 (469/411 d.o.f.) \\
\end{tabular}
\par
\begin{tabular}{c   c   c c c}
\hline
\hline
Rev.200 & Parameter & MODEL A & MODEL B & MODEL C \\
\hline
    & $kT_{\rm 1}$ (keV) & 0.66 & 0.66 & 0.66 \\
    & $EM_{\rm 1}$ (10$^{52}$~cm$^{-3}$) & 78 $\pm$ 24 & 81 $\pm$ 65 & 72 $\pm$ 26   \\
    & $kT_{\rm 2}$ (keV) & 1.34 & 1.34 & 1.34 \\
    & $EM_{\rm 2}$ (10$^{52}$~cm$^{-3}$) & 364 $\pm$ 63 & 320 $\pm$ 65 & 351 $\pm$ 26   \\
VMEKAL    & $kT_{\rm 3}$ (keV) & 3.6 & 3.6 & 0.34 \\
    & $EM_{\rm 3}$ (10$^{52}$~cm$^{-3}$) & 0--146 & 0--163 & 0--46   \\
(3 components)    & O          & 0.11 & 0.10 $\pm$ 0.03 & 0.08 $\pm$
    0.03 \\
    & Ne         & 0.11 & $0.44 \pm 0.12$ & $0.37 \pm 0.10$ \\
    & Other abundances   &$ 0.11\pm0.01 $& $0.11\pm0.01$ & 0.11 $\pm$
    0.01 \\
%\hline
    & $\chi^{2}$ & 0.75 (167/223 d.o.f.) & 0.69 (153/221 d.o.f.) &
    0.70 (156/221 d.o.f.) \\
\hline
\end{tabular}
\end{table}