\begin{table}%t2      
%\centering
\par
\caption{\label{t2}Best-fitting parameters for the two-phase warm absorber.} 
\begin{tabular}{c c c c c c c c c}
\hline\hline  
\noalign{\smallskip}              
Obs &  $\Gamma_{\rm soft}$ &  Log$~\xi$   &  $N_{\rm H}$  &  ${v}$ &  Log$~\xi$   &  $N_{\rm H}$  & $v$ &  Cstat/d.o.f. \\    
    --   &        --       & (erg s cm$^{-1}$) & 10$^{21}$ cm$^{-2}$  &  km~s$^{-1}$ & (erg s cm$^{-1}$) & 10$^{21}$ cm$^{-2}$ & km~s$^{-1}$ &     --        \\
\hline\\[-3mm]
Jan.~01   &  2.60 $\pm$ 0.07  & 2.2 $\pm$ 0.2   & 1.2 $\pm$ 0.5   &  $<$1600  &  $\rm 3.3^{+0.8}_{-0.4}$  & $<$17.0  & 1000 $\pm$ 460 & 3082/2725  \\
\par
Jan.~05   &    2.41 $\pm$ 0.07   &  1.5 $\pm$ 0.1    & 2.3 $\pm$ 0.5  & $<$100   &  3.2 $\pm$ 0.1  & $\rm 30.0^{+110}_{-20.0}$  &  $<$100  & 1958/1435 \\[0.8mm]
\par
July 05   &   2.07 $\pm$ 0.07   &  $\rm 1.7^{+0.3}_{-0.2}$   &$\rm 3.9^{+2.6}_{-1.6}$  & $<$1000 &   2.8 $\pm$ 0.3  & $\rm 7.6^{+18}_{-5.5}$ & $<$1000  & 1855/1437   \\[-3mm]\\    
\hline                                  
\end{tabular}
\end{table}