\begin{table}%T3
\caption{Best-fitting spectral parameters in the 0.3--12~keV energy range.
{\sc comp}TT: Comptonization of soft photons in a hot plasma (Titarchuk \cite{Titarchuk94}), 
and {\sc diskline}: profile line emitted by a relativistic accretion disk around a non-rotating BH 
 (Fabian et~al. \cite{Fabian89}).}
\label{table2}
%\centering
\par
\begin{tabular}{l}
\hline
\hline
\noalign {\smallskip}                       
   {\sc 2  comp}TT$^{a}$        + {\sc diskline}$^{b}$  \\
\noalign {\smallskip}                       
\hline
\noalign {\smallskip}                       
  $kT_{\rm photon1}=15$~eV$^d$             \\
\noalign {\smallskip}            
      $kT_{\rm plasma1}= 1.24^{+0.27}_{-0.22}$~keV ~~~ $\tau_{_{1}}=6.6^{+0.5}_{-0.8}$  \\
\noalign {\smallskip}                     
\noalign {\smallskip}                     
$kT_{\rm photon2}= kT_{\rm plasma1}$ (tied) \\
$kT_{\rm plasma2}= 100$~keV$^d$ ~~~ $\tau_{_{2}}=0.4^{+0.5}_{-0.3}$   \\
\noalign {\smallskip}                       
\noalign {\smallskip}                       
 $F_{\rm line}^{c}=8.3\pm3.8\times10^{-6}$~erg~cm$^{-2}$~s$^{-1}$ ~~~ $EW=287\pm130$~eV        \\
\noalign {\smallskip}                       
\noalign {\smallskip}                       
 $F^{0.3-12~{\rm keV}}_{\rm cont}=8.7^{+2.3}_{-2.0}\times10^{-12}$~erg~cm$^{-2}$~s$^{-1}$   \\
\noalign {\smallskip}                       
\noalign {\smallskip}                        
$\chi^{2}/\mbox{d.o.f.}=531.3/524$          \\
\noalign {\smallskip}                        
\hline
\end{tabular}
\parbox{8.8cm}{$^a$ The soft photon temperature in the harder {\sc comp}TT component ($kT=100$~keV) 
has been fixed to the plasma temperature of the softer component. 
$^b$ $R_{\rm in}=6~R_{\rm g}$ and $R_{\rm out}=1000~R_{\rm g}$, inclination~=~30$^{\circ}$. 
$^c$ The line energy has been fixed at 6.4~keV in the quasar frame. 
$^d$ Frozen parameter (see text).}
\end{table}