\begin{table}%t3
\caption{X-ray continuum spectral properties.}
%\centerline
{
%\scriptsize
\begin{tabular}{lccccccccc}
\hline
\hline
\noalign{\smallskip}
Source &  \multicolumn{2}{c}{Thermal component} && \multicolumn{3}{c}{Partial absorption} && Power law & $\chi^2$(d.o.f.) \\    
\noalign{\smallskip}
       &      $kT$    & $P_F^a$                    && $  N_{\rm H}$  & $Cvr$ & $P_F^a$ && $\Gamma$  &\\
       &      [keV]   & [\%]                     &&$[{\rm 10^{21}~cm^{-2}}]$ & [\%]&[\%]&&    &\\     
\noalign{\smallskip}
\hline
\noalign{\smallskip}
  NGC~1692  &  $0.79\pm0.08$ & $3\times10^{-9}$      && $\rm 6_{-4}^{+12}$ & 95  & $2\times10^{-2}$&& $\rm 2.9_{-1.1}^{+0.4}$ & 131.6(143)\\
\noalign{\smallskip}
\noalign{\smallskip}
 PKS~0625-35&  $0.64\pm0.19$ & $3\times 10^{-3}$  && $\rm 1.5_{-1.1}^{+1.8}$ & 12 & $1\times10^{-2}$ && $\rm 2.52_{-0.03}^{+0.02}$   & 791.3(762) \\
\noalign{\smallskip}
\noalign{\smallskip}
3C~88        & $0.64\pm0.02$ & $1\times 10^{-15}$      && $\rm 0.5_{-0.5}^{+6.2}$ & 50  & $5\times10^{-1}$ &&$\rm 1.11_{-0.14}^{+0.18}$&  164.6(133)\\
\noalign{\smallskip}
\noalign{\smallskip}
3C~444       & $1.45\pm0.15$ &$7\times 10^{-7}$       && $\rm 1.2_{-0.5}^{+0.7}$ & 95 & $6\times 10^{-5}$       && $\rm 1.92_{-0.33}^{+0.27}$ & 394.4(377)\\
\hline
\end{tabular}}\medskip
 $^a$~Probability associated with the $F$ statistic (the smaller the value the higher the significance
of the spectral component). 
\ngc\ requires a second thermal component
with $kT=1.44\pm0.15$ ($P_F=5\times 10^{-9}$). The quoted uncertainties
correspond to 90\% confidence levels.
\label{tab3}
\end{table}