\begin{table}%T4
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\caption{\label{xabs_table}Best-fit parameters of the three-phase~{\it xabs} model for all four observations. }
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\begin{tabular}{c | l l l l | l l l l l | l l l l | l}
\hline \hline 
 & \multicolumn{4}{c|}{Phase A:} & \multicolumn{5}{c|}{Phase B:} & \multicolumn{4}{c|}{Phase C:} & \\ 
Obs.~& log $\xi$\tablefootmark{a}  & $N_{{\rm H}}$\tablefootmark{b}  & Flow $v$\tablefootmark{c}  & rms $v$\tablefootmark{c}
& log $\xi$\tablefootmark{a}  & $N_{{\rm H}}$\tablefootmark{b} & Flow $v$\tablefootmark{c} & rms $v$ $^c$ & {\it fcov}\tablefootmark{d} 
& log $\xi$\tablefootmark{a}& $N_{{\rm H}}$\tablefootmark{b} & Flow $v$\tablefootmark{c} & rms $v$\tablefootmark{c}
& $\chi _\nu ^2$/d.o.f.\tablefootmark{e}  \\
\hline
1 & $0.95 \pm 0.02$ & $0.33 \pm 0.01$ & $-100 \pm 40$ & $60 \pm 10$ &
 $2.41 \pm 0.05$ & $1.7 \pm 0.2$ & $-1500 \pm 100$ & $500 \pm 100$ & $0.64 \pm 0.09$ & 
 $3.00 \pm 0.05$ & $1.2 \pm 0.2$ & $-800 \pm 300$ & $300 \pm 100$ & $1.41/2746$ \\
2 & $0.96 \pm 0.02$ & $0.34 \pm 0.01$ & $-100 \pm 30$ & $40 \pm 10$ &
 $2.42 \pm 0.04$ & $2.0 \pm 0.3$ & $-1500 \pm 100$ & $500 \pm 100$ & $0.55 \pm 0.04$ & 
 $2.99 \pm 0.03$ & $1.3 \pm 0.2$ & $-1000 \pm 100$ & $400 \pm 100$ & $1.44/2784$ \\
3 & $0.87 \pm 0.02$ & $0.43 \pm 0.02$ & $-200 \pm 40$ & $40 \pm 10$ &
 $2.43 \pm 0.03$ & $3.2 \pm 0.4$ & $-1600 \pm 200$ & $400 \pm 100$ & $0.64 \pm 0.04$ & 
 $3.07 \pm 0.04$ & $1.7 \pm 0.2$ & $-800 \pm 200$ & $400 \pm 100$ & $1.41/2689$ \\
4 & $0.97 \pm 0.02$ & $0.37 \pm 0.01$ & $-200 \pm 20$  & $30 \pm 10$ &
 $2.39 \pm 0.05$ & $2.0 \pm 0.1$ & $-1500 \pm 100$ & $600 \pm 100$ & $0.54 \pm 0.04$ & 
 $2.99 \pm 0.02$ & $1.7 \pm 0.2$ & $-1000 \pm 100$ & $500 \pm 100$ & $1.42/2724$ \\[2pt]
\hline
\end{tabular}
\tablefoot {Obtained from the simultaneous fitting of the \mbox{EPIC-pn}, RGS1 and RGS2 spectra.\\
\tablefoottext{a}{${\rm erg\ cm\ }{\rm s}^{-1}$;}
\tablefoottext{b}{$10^{22}$ ${\rm cm}^{-2}$;}
\tablefoottext{c}{km ${\rm s}^{-1}$;}
\tablefoottext{d}{the covering fraction of Phases A and C is 1.0;}
\tablefoottext{e}{the \redchi\ values are further improved by including the modelling of the observed emission features discussed in Sect.~\ref{emission_sec}.}} 
\end{table}