\begin{table}%t1 \caption{\label{Table:Spec}Fits of the ISGRI and {\textit{Chandra}} data with the {\sc{comptb}} model.} \begin{tabular}{l l} \hline \hline Parameter & Value \\ \hline Blackbody temperature ($kT_{\rm s}$) & 0.72 keV \\ Index of Seed photons ($\gamma$) & 0.95 \\ Energy index of Compton spec. ($\alpha$) & 0.36 \\ Efficiency of bulk over thermal Compt. ($\delta$) & 2.32 \\ Electron temperature ($kT_{\rm e}$) & 24.6 keV \\ Ilumination factor (log$(A)$) & $-2.3$ \\ Normalization ($C_{\rm N}$)$\dagger$ & $1.18\times10^{-2}$ \\ $\chi^{2}$/d.o.f. & 166.74 / 248 \\ \hline \end{tabular} \tablefoot{$\dagger$ Normalization of the seed-photon spectrum defined as $L_{39}/D_{10}^2$, where $L_{39}$ is its luminosity in units of $10^{39}~\rm{erg~s^{-1}}$, and $D_{10}$ is the distance to the source in units of 10~kpc.} \end{table}