\begin{table}%t6
  \caption{\label{table:model_2_diskline}Best-fit values of the parameters obtained fitting the emission features with relativistic smeared lines (diskline in XSPEC). The Fe-K$\alpha$ 
feature is modelled with two diskline components.}
%\centerline
{\begin{tabular}{l c c c }         
\hline\hline                        
Parameters  &
Aver. spectrum&
Spectrum 1+3&
Spectrum 2\\
\hline \noalign{\smallskip}                       
$N_{\rm H}$  (10$^{22}$ cm$^{-2}$)&  
$0.734^{\rm +0.002}_{-0.004}$&
0.734 (fixed)  &
0.734 (fixed)
\\
&\\
$kT_{\rm BB}$ (keV)         &
$1.801^{\rm +0.013}_{-0.009}$&
$1.784^{\rm +0.025}_{-0.013}$&
$1.820^{\rm +0.012}_{-0.011}$\\
 $N_{\rm BB}$ (10$^{-1}$) &
$1.043^{\rm +0.007}_{-0.011}$&
$0.920^{\rm +0.013}_{-0.020}$&
$1.123^{\rm +0.008}_{-0.010}$\\
&\\
$kT_{\rm DIS~KBB}$ (keV)         &
$1.06 \pm 0.02$&
$1.08^{\rm +0.03}_{-0.02}$&
$1.056^{\rm +0.011}_{-0.017} $\\
$N_{\rm DIS~KBB}$  &
$201^{\rm +5}_{-14}$&
$210^{\rm +14}_{-20}$&
$186^{\rm +10}_{-5} $\\
&\\
$E_{1~{\rm keV}}$ (keV) &
$1.052^{\rm +0.006}_{-0.005}$&
 $1.032^{\rm +0.009}_{-0.017}$  &
 $1.062^{\rm +0.007}_{-0.009}$  \\
$\sigma_{1~{\rm keV}}$ (eV) &
$86^{\rm +13}_{-6}$   &
$120^{\rm +20}_{-8}$  &
$66^{\rm +10}_{-8}$  \\
$I_{1~{\rm keV}}$  & 
$24^{\rm +3}_{-2}$   &
$41^{\rm +7}_{-4}$   &
$17.0^{\rm +2.1}_{-1.4}$   \\
Equiv. width (eV) & 
$22 \pm 2$  &
$31 \pm 3$  &
$17 \pm 2$  \\
&&\\
$\beta$  emiss. index& 
$-2.2 \pm 0.2               $ &
$-2.17^{\rm +0.14}_{-0.19} $ &
$-2.10^{\rm +0.12}_{-0.19}$ \\
$R_{\rm in}$ ($R_{\rm g}$) & 
$9^{\rm +17}_{-3}$ &
$6^{\rm +14}$ &
$9^{\rm +20}_{-3}$ \\
$R_{\rm out}$ ($R_{\rm g}$) & 
$3600^{\rm +18000}_{-1900}$&
3600 (fixed)&
3600 (fixed)
 \\
$\theta$ (degrees)   &
$43^{\rm +4}_{-3}$  &
43 (fixed)&
43 (fixed)\\
&\\
$E_{{\rm S} \; {\rm XVI}}$ (keV) &
2.62 (fixed)  &
2.62 (fixed)  &
2.62 (fixed)  \\
%($10^{-3}$ ph cm$^{-2}$ s$^{-1}$)
$I_{{\rm S \; XVI}}$   &
$2.0 \pm 0.5$  &
$3.4^{\rm +1.0}_{-1.2}$  &
$0.7 \pm 0.6$  \\
Equiv. width (eV) & 
$5 \pm 3$  &
$8 \pm 4 $  &
$2^{\rm +3}_{-2} $  \\
&\\
$E_{{\rm Ar} \; {\rm XVIII}}$ (keV) &
$3.30^{\rm +0.04}_{-0.03}$  &
$3.32 \pm 0.05$  &
$3.29 \pm 0.04$  \\
$I_{{\rm Ar \; XVIII}}$    &
$3.2^{\rm +0.5}_{-0.8}$ & 
$3.7^{\rm +0.9}_{-1.2}$  &
$2.6^{\rm +0.6}_{-0.7} $  \\
Equiv. width (eV) & 
$10^{\rm +4}_{-10}$  &
$12^{\rm +6}_{-5}$  &
$8 ^{\rm +5}_{-3}$  \\
&\\
$E_{{\rm Ca} \; {\rm XIX}}$ (keV) &
$3.896 \pm 0.012$ &
$3.89^{\rm +0.03}_{-0.04}$ &
$3.90 \pm 0.03$ \\
$I_{{\rm Ca} \; {\rm XIX}}$  & 
$3.4^{\rm +0.5}_{-0.7}$   &
$3.6^{\rm +1.0}_{-1.1}$   &
$3.0 \pm 0.7$   \\
Equiv. width (eV) & 
$14^{\rm +4}_{-8}$  &
$15^{\rm +5}_{-6}$  &
$12^{\rm +3}_{-6}$  \\
&\\
E$_{{\rm Fe \; XXV}}$ (keV) &
6.70 (fixed) &
6.70 (fixed) &
6.70 (fixed) \\
$I_{{\rm Fe \; XXV}}$  & 
$4.2^{\rm +0.4}_{-0.9}$   &
$4.9 \pm 1.3$   &
$3.9^{\rm +1.0}_{-0.9}$   \\
Equiv. width (eV) & 
$40 \pm 10$  &
$60^{\rm +20}_{-30}$  &
$40^{\rm +10}_{-20}$  \\
&\\
$E_{{\rm Fe} \; {\rm XXVI}}$ (keV) &
6.97 (fixed) &
6.97 (fixed) &
6.97 (fixed) \\
$I_{{\rm Fe} \; {\rm XXVI}}$  & 
$1.6^{\rm +0.6}_{-0.3}$   &
$0.9^{\rm +0.9}_{-0.9}$   &
$2.1^{\rm +0.6}_{-0.7}$   \\
Equiv. width (eV) & 
$17^{\rm +9}_{-17}$  &
$10^{\rm +20}_{-10}$  &
$20 \pm 10$  \\
&\\
$\chi_{\rm red}^2({\rm d.o.f.})$ &
$1.49(268)$  &
$1.25(271)$  &
$1.30(271)$  \\\noalign{\smallskip}  
 \hline                                             
\end{tabular}}
\par
Note.   See Table~\ref{table:model}.  
\end{table}