\begin{table}%T1
\caption{Best fit parameters for a single power law of MOS and MECS. The values given in the
first section are for the spatially integrated analysis, while those of the second section are
for the MOS annular regions.}\label{t1}
%\centerline
{
\begin{tabular}{cccccc}
\hline\hline
     & Radius & $\Gamma^a$ & $K^{a,~b}$ &$F^{a,~c}$ & $\chi^2_r$ (d.o.f.) \\
\hline
MOS  & ~0\farcm5      & ~~1.50 $\pm$ 0.02   & ~~{\rm 0.39 $\pm$ 0.01}  & ~~{\rm 1.785} $\pm$ 0.009 & ~~1.16 (253) \\
MOS  & ~$1'$~~      & ~~1.55 $\pm$ 0.01   & ~~0.95 $\pm$ 0.02        & ~~{\rm 3.98} $\pm$ 0.01   & ~~1.08 (324) \\ 
MOS  & ~1\farcm5      & ~~1.56 $\pm$ 0.01   & ~~1.09 $\pm$ 0.02        & ~~{\rm 4.49} $\pm$ 0.01   & ~~1.11 (331) \\
MOS  & ~$2'$~~      & ~~1.55 $\pm$ 0.01   & ~~1.18 $\pm$ 0.02        & ~~{\rm 4.95} $\pm$ 0.01   & ~~1.07 (337) \\
\hline 
MECS & ~$4'$~~      & ~~1.61 $\pm$ 0.02   & ~~1.50 $\pm$ 0.04        & ~~{\rm 5.66  $\pm$ 0.03} & ~~0.96 (66)  \\
MECS & ~$8'$~~      & ~~1.67 $\pm$ 0.02   & ~~1.88 $\pm$ 0.05        & ~~{\rm 6.39} $\pm$ 0.03   & ~~0.93 (66)  \\
MECS & $12'$~~      & ~~1.66 $\pm$ 0.02   & ~~2.17 $\pm$ 0.05        & ~~{\rm 7.50} $\pm$ 0.03   & ~~1.02 (66)  \\
MECS & $15'$~       & ~~1.66 $\pm$ 0.01   & ~~2.62 $\pm$ 0.09        & ~~{\rm 9.06} $\pm$ 0.04   & ~~1.02 (66)  \\
\hline
PDS  & FOV          & ~~2.00 $\pm$ 0.05   & ~~{\rm 6.19} $\pm$ 0.95$^{d}$ & ~~{\rm 15.9} $\pm$ 0.4$^{e}$  & ~~0.73 (16) \\
\hline
{\rm MOS  }&{\rm ~0\farcm5--$1'$ }&{\rm ~~1.60 $\pm$ 0.02  }&{\rm ~~0.56 $\pm$ 0.02  }&{\rm ~~2.150 $\pm$ 0.009 }&{\rm ~~1.05 (209) }\\
{\rm MOS  }&{\rm ~$1'$--1\farcm5 }&{\rm ~~1.61 $\pm$ 0.03  }&{\rm ~~0.14 $\pm$ 0.01  }&{\rm ~~0.528 $\pm$ 0.005 }&{\rm ~~0.88 (72) }\\ 
{\rm MOS  }&{\rm ~1\farcm5--$2'$ }&{\rm ~~1.50 $\pm$ 0.05  }&{\rm ~~0.08 $\pm$ 0.01  }&{\rm ~~0.361 $\pm$ 0.004 }&{\rm ~~0.77 (49) }\\
{\rm MOS  }&{\rm ~$8'$--$12'$  }&{\rm ~~1.90 $\pm$ 0.06  }&{\rm ~~0.51 $\pm$ 0.05  }&{\rm ~~1.165 $\pm$ 0.02  }&{\rm ~~1.13 (231) }\\   
\hline
\end{tabular}}
\par
\medskip
$^a$ Errors correspond to 1 standard deviation for one interesting parameter.\\ 
$^{b}$ Power law normalisation $K$ is expressed in units of 
        $10^{-2}$~photons~cm$^{-2}$~s$^{-1}$~keV$^{-1}$ at 1~keV.\\ 
$^{c}$ Flux is in units of $10^{-11}$~erg~cm$^{-2}$~s$^{-1}$. 
        It is relative to the 3$-$10~keV band for the MOS/MECS and to the
        20$-$100~keV band for the PDS. 
        The reported errors are statistical. Systematical errors amount 
             to 5\% for MOS flux values and 10\% for the MECS.\\  
$^{d}$ The PDS normalisation is obtained dividing the 
        single power law fit result ($5.2\pm0.8$) 
        by the intercalibration factor $f_{MP}=0.84$ obtained 
        in the combined fit with the MECS spectrum extracted 
        from the circle of $15'$ radius.\\
$^{e}$ The PDS flux value 
        {\rm is that obtained from the single power law fit}
        ({\rm $13.39\pm0.34$}) {\rm divided} by the intercalibration factor $f_{MP}=0.84$.
\end{table}