\begin{table}%T1
\caption{\label{tab:spectrum}Best-fits to the 0.5--10~keV XMM-Newton PN persistent
emission spectra of \src\ using a disk-blackbody model with an inner
temperature $KT_{\rm in}$ and normalization $k$~given by $(R_{\rm
in}/d)^2$ where $R_{\rm in}$ in the inner radius in km and $d$ the
distance in units of 10~kpc and a power-law with a photon index,
$\alpha$ together with an emission and two absorption lines.  }
%\centering
\par
\begin{tabular}{llcc}
\hline\hline
Component & Parameter&2001 January              &  2002 February \\
\hline
& $N{\rm _H}$  ($10^{21}$~atom cm$^{-2}$) & $3.2 \pm 0.1$ &  $3.1 \pm 0.1$ \\
&$L$ (\ergsec, at 10 kpc)    & $1.1 ~ 10^{37}$  & $1.0 ~ 10^{37}$  \\
&$\chi ^2$/d.o.f.        & 264.6/225   & 244.6/225 \\
Disk-blackbody &$kT_{\rm in}$ (keV)   &$\rm 1.97 ~ ^{+0.04} _{-0.07}$  
& $2.31 \pm 0.03 $ \\
          &$k$  & $1.41 \pm 0.10$  & $1.06 \pm 0.04$ \\
Power-law&$\alpha$    & $2.20 \pm 0.09$ & $2.34  \pm 0.09$ \\
          &1 keV normalization& $0.106 \pm 0.006$  & $0.099 \pm 0.005$ \\
Emission line 
& $E_{{\rm line}}$ (keV)     & $\rm 0.96~ ^{+0.04} _{-0.06}$ 
& $\rm 0.93 ~ ^{+0.05} _{-0.09}$ \\
\par
& $\sigma$ (eV)              & $\rm 175 ~ ^{+75} _{-50}$   & $175 \pm 65$    \\
&$EW$              (eV)        & $32 \pm 15$   & $29 \pm 13$ \\
Fe~{\sc xxvi} K$\alpha$ abs
& $E_{{\rm line}}$ (keV)     &$6.95 \pm 0.03$    & $6.96 \pm 0.04$ \\
feature&$\sigma$ (eV)                  &$<$120  &  $<$95    \\
&$EW$              (eV)         &$\rm -27 ~ ^{+11} _{-8}$  
& $\rm -21 ~ ^{+8} _{-5}$ \\
Fe~{\sc xxvi} K$\beta$ abs
& $E_{{\rm line}}$ (keV)      &$\rm 8.20 ~ ^{+0.05} _{-0.10}$  
& $8.16 \pm 0.06$ \\
feature&$\sigma$ (eV)          & $<$170     &   $<$80    \\
&$EW$              (eV)         & $-17 \pm 9$ & $-16 \pm 9$ \\                   
\hline
\end{tabular}
\end{table}