\begin{table}%t4
%\centering
\par
\caption{\label{TFITS}Spectral fits of the EPIC spectra of the quasars. 
The errors for the~90\% confidence level are provided if $\chi^2_{\rm reduced} < 2.0$.
Fits labeled with $\ddagger$ have~$\chi^2_{\rm reduced} > 2.0$ and consequently
 no errors were determined.
Fits labeled with~$\dagger$ were performed over the 2--10 keV energy range for~MOS and the
2--12~keV energy range of pn, respectively.
Explanation of labels: (1) explanation of the used models:
$pl$: power-law (XSPEC: pow), 
$nab$: neutral absorber at the redshift of the source (XSPEC: zphabs), 
$pab$: partial covering with neutral absorber at the redshift of the source (XSPEC: zpcfabs), 
$iab$: ionized absorption at the redshift of the source  (XSPEC: absori),
$ga$: Gaussian line at the redshift of the source (XSPEC: zgauss),
$la$: relativistic disk line after Laor (XSPEC: laor, Laor et~al.  \cite{Laor1997});
Parameters: (a) equivalent column density; (b) covering fraction; 
(c) ionization level of absorbing material $\xi=L/nr^{2}$,  as defined in {\em XSPEC};
 (d) photon flux at $1 \rm ~keV$; (e) degrees of freedom.
}
\begin{tabular}{l@{  }l c@{  }c c@{  }c c@{  }r r@{  }r}
\hline  \hline  
Fit & model$^{(1)}$    & \multicolumn{4}{c}{Absorber}      
                        & \multicolumn{2}{c}{Continuum} 
                        & \multicolumn{2}{c}{Statistic}  \\ 
       &                & \multicolumn{2}{c}{neutral}    
                        & \multicolumn{2}{c}{warm}   
                        & \multicolumn{2}{c}{power-law} 
                        & \multicolumn{2}{c}{ }  \\ 
    &                   & \multicolumn{1}{c}{$N_{\rm H}^{(a)}$} & 
                          \multicolumn{1}{c}{$cf^{(b)}$}  
                        &  $N_{\rm H}^{(a)}$ & $\xi^{(c)}$
                        & \multicolumn{1}{c}{$\Gamma$} & \multicolumn{1}{c}{$N^{(d)}$} 
                        & \multicolumn{1}{c}{$\chi^2$} & \multicolumn{1}{c}{d$^{(e)}$}   \\ 
    &                   & \multicolumn{1}{c}{{\small $[10^{22} ~\rm cm^{-2}]$}} &
                           \multicolumn{1}{c}{ }  
                        & {\small $[10^{22} ~\rm cm^{-2}] $} 
                        & \multicolumn{1}{c}{{\small $[\rm  erg ~ cm ~s^{-1}] $}} & &  
                         \multicolumn{1}{c}{\small{$[ \rm keV^{-1}~cm^{-2}~s^{-1}]$}} 
                        & \multicolumn{1}{c}{$ $} & \multicolumn{1}{c}{}   \\ 
\hline  
\multicolumn{10}{c}{\underline{ PG~1001+054}}\\
1  & $ nab * pl $             & $0.00^{\ddagger}$ & 
                              &        &
                              & $3.77^{\ddagger}$ & $1.02^{\ddagger}\times 10^{-5}$
                                       & 156.7 & 9 \\
2  &  $ pab * pl $           & $7.86^{\ddagger}$ & $0.95^{\ddagger}$
                              &        &    
                              & $3.20^{\ddagger}$ & $2.44^{\ddagger}\times 10^{-4}$
                                       &  71.1 & 8 \\
3  &  $ iab * pl $           &        & 
                              & $\rm 19.2_{-7.3}^{+11.9}$ & $\rm 542^{+97}_{-147}$
                              & $\rm 1.97 _{-0.14}^{+0.17 }$ & $6.62^{+1.01}_{-0.71}\times 10^{-5}$
                                       &  15.6 & 8 \\ 
\multicolumn{10}{c}{\underline{PG~2112+059}} \\
4  &  $ nab * pl $            & $0.00^{\ddagger}$ & 
                              &        &
                              & $1.54^{\ddagger}$ & $ 7.40^{\ddagger}\times10^{-5}$
                                       & 92.0 & 41  \\
5  &  $ pab * pl $           & $\rm 4.55_{-1.17}^{+1.55}$ & $\rm 0.69_{-0.12}^{+0.08}$
                              &        &    
                              & $\rm 2.17_{-0.20}^{+0.09}$ & $2.02^{+0.62}_{-0.53}\times10^{-4}$
                                       & 65.1  & 40 \\
6  &  $ iab * pl $             &        & 
                              & $\rm 3.53_{-0.96}^{+1.33}$ & $\rm 270^{+125}_{-72}$
                              & $\rm 1.92_{-0.09}^{+0.09}$ & $1.35^{+0.14}_{-0.13}\times10^{-4}$
                                       & 38.7 & 40 \\ 
\multicolumn{10}{c}{\underline{PG~1535+547}} \\
7  &  $ nab * pl $            & $6.94^{\ddagger}$ & 
                              &        &
                              & $1.67^{\ddagger}$ & $5.18^{\ddagger}\times10^{-4}$
                                       & 807.3 & 108 \\
8  &  $ pab * pl $            & $8.16^{\ddagger}$ & $0.95^{\ddagger}$
                              &        &    
                              & $1.53^{\ddagger}$ & $4.17^{\ddagger}\times10^{-4}$
                                       & 357.5 & 107 \\
9  &  $ iab * pl  $           &        & 
                              & $12.71^{\ddagger}$ & $533^{\ddagger}$
                              & $1.03^{\ddagger}$ & $1.57^{\ddagger}\times10^{-4}$
                                       & 338.2  & 107 \\ 
10  &  $ pab * iab * pl $      & $\rm 10.3_{-0.8}^{+0.8}$ & $\rm 0.97_{-0.02}^{+0.01}$ 
                              & $\rm 2.41_{-0.57}^{+0.86}$  & $\rm 136_{-50}^{+81}$ 
                              & $\rm 2.13_{-0.05}^{+0.05}$  & $1.37_{-0.13}^{+0.14} \times10^{-3}$
                                       & 132.8  & 105 \\
11  &  $ iab * (pl+la)  $ 
                              &        & 
                              & $\rm 12.2_{-0.7}^{+0.5}$ & $\rm 528_{-24}^{+84}$
                              & $\rm 1.08_{-0.04}^{+0.01}$ & $1.29_{-0.03}^{+0.06}\times10^{-4}$
                                       & 157.8  & 103 \\ 
\par
12 &  $ pab*iab*(pl+ga) $
                              & $\rm 9.72_{-0.50}^{+0.60}$ & $\rm 0.97_{-0.01}^{+0.01}$ 
                              & $\rm 2.52_{-0.25}^{+0.27}$  & $\rm 145_{-19}^{+23}$ 
                              & $\rm 2.13_{-0.05}^{+0.04}$  & $1.28_{-0.04}^{+0.04} \times10^{-3}$
                                       & 115.8  & 102 \\
13$^{\dagger}$ &  $ pab*iab*(pl+ga) $
                              & $\rm 13.2_{-1.3}^{+1.0}$ & $\rm 0.92_{-0.01}^{+0.01}$ 
                              & $\rm 9.78_{-1.38}^{+1.09}$  & $\rm 2126_{-698}^{+1379}$ 
                              & $\rm 2.65_{-0.18}^{+0.16}$  & $3.87_{-0.19}^{+0.13} \times10^{-3}$
                                       & 87.5  & 81 \\
14 &  $ pab*iab*(pl+la) $
                              & $\rm 8.90_{-0.56}^{+0.57}$ & $\rm 0.96_{-0.01}^{+0.01}$ 
                              & $\rm 2.91_{-0.57}^{+0.81}$  & $\rm 147_{-48}^{+70}$ 
                              & $\rm 2.05_{-0.05}^{+0.04}$  & $1.03_{-0.10}^{+0.09} \times 10^{-3}$
                                       & 104.1  & 101 \\ 
15$^{\dagger}$ &  $ pab*iab*(pl+la) $
                             & $\rm 10.6_{-1.3}^{+1.8}$ & $\rm 0.93_{-0.03}^{+0.02}$ 
                              & $\rm 6.60_{-2.90}^{+3.71}$  & $\rm 620_{-490}^{+1087}$ 
                              & $\rm 2.32_{-0.19}^{+0.20}$  & $1.89_{-0.30}^{+0.22} \times 10^{-3}$
                                       & 83.4   &  80 \\  
\hline
\end{tabular}
\end{table}