\begin{table}%t2
%\centering
\par
\caption{Spectroscopy of \src\  with the same model adopted for the two observations (RGS1+RGS2+pn+MOS1+MOS2 data) consisting of a power-law  model together with a blackbody, both equally absorbed by  a variable absorption model, {\sc vphabs} in {\sc xspec}.}
\label{tab:spec}
\small
\begin{tabular}{lcc}
\hline \hline 
Parameters                 &   Obs~I                &   Obs~II  \\
\hline
 $N_{\rm H}$  (10$^{22}$~cm$^{-2}$)   &    $0.058 \pm{0.006}$  &     $0.094 \pm{0.006}$  \\
 $kT_{\rm bb}$   (keV)                &    $0.62  \pm{0.01}$    &    $0.61  \pm{0.01}$    \\
 $R_{\rm bb}$    (km)                 &    $3.1   \pm{0.1}$      &   $3.5   \pm{0.1}$      \\
 $\Gamma$                             &    $1.58  \pm{0.02}$    &    $1.52  \pm{0.02}$    \\
 Flux  ($10^{-11}$~erg~cm$^{-2}$~s$^{-1}$)&   1.6              &   1.5                 \\
 $L_{\rm X}$ (0.5--10~keV) ($10^{36}$~erg~s$^{-1}$)   &   1.6        &   1.5                 \\
 red. $\chi^{2}$ (d.o.f.)                &   1.154 (2363)         &   1.044 (2712) \\
\hline
\end{tabular}
\end{table}