\begin{table}%T1 \caption{\label{tabspec}Results of the fitting procedure to the joint ISGRI/JEM-X spectrum with different models.} \small%\centerline { \begin{tabular}{c c c c c} \hline \hline\noalign{\smallskip} \# & Model~& $\chi^2$/d.o.f. & $kT$ [keV] & Additional parameters\\ \hline 1 & MEKAL & 108.9/24 & 4.4 & ~ \\ 2 & MEKAL+power-law & 25.5/22 & $3.66\pm0.12$ & $\Gamma=2.75_{-0.18}^{+0.16}$ \\ 3 & MEKAL+NGC~1275$^a$ & 55.9/24 & $4.1$ & ~ \\ 4 & MEKAL+NT$^b$ & 118.7/24 & $3.3$ & ~ \\ 5 & MEKAL+MEKAL+NGC~1275$^a$ & 23.9/22 & $3.41\pm0.15$ & $kT_{2}=11_{-3}^{+4}$ \\[0.8mm] 6 & MEKAL+cutoffpl$^c$+NGC~1275$^a$ & 25.0/22 & $3.48\pm0.13$ & $E_{\rm cut}=16_{-4}^{+6}$ \\ \noalign{\smallskip}\hline \end{tabular}} \smallskip $^a$ Fixed to the value reported in \citet{churazov}.\\ $^b$ Fixed to the parameters extracted by \citet{sanders05}.\\ $^c$ Photon index of the cut-off power law fixed to $\Gamma=2.0$. \end{table}