Table 3: Reflection component: fits of the MECS and PDS data ( 1.65-220 keV). A stands for photoelectric absorption, PL for power law, PEXRAV for the Compton reflection from cold material and COMPHA for the thermal Comptonisation model. $\Gamma $ is the photon index of the primary power law, $E_{\rm c}$ is the folding (upper cutoff) energy, R is the normalization of the reflection component, $kT_{\rm e}/m_{\rm e}c^2$ is the corona temperature (normalized to the electron mass), $\tau $ is the corona optical depth, $E_{\rm Fe}$ is the Fe K$\alpha $ line energy (rest frame) and $EW_{\rm Fe}$ its equivalent width. As $N_{\rm H}$ is not constrained above 1.65 keV, we fixed it to the Galactic value. In addition, the results of a fit of the XMM-Newton data above 2 keV are presented.
Obs. Model $\Gamma $ $E_{\rm c}$ R $kT_{\rm e}/m_{\rm e}c^2$ $\tau $ $E_{\rm Fe}$ $EW_{\rm Fe}$ $\chi^2$(d.o.f.), proba.
      keV       keV eV  
SAX 2001 A+PL $\rm 1.83^{+0.03} _{-0.03}$ - - - - - - 137.47(93), 0.002
  A+PEXRAV+G $\rm 2.00^{+0.03} _{-0.03}$ $\rm 487.17^{+\it u} _{-304.40}$ $\rm 1.74^{+0.25} _{-0.32}$ - - $\rm 6.51^{+0.42} _{-0.55}$ 71.30 100.38(89), 0.192
  A+COMPHA+G - - $\rm 3.22^{+0.99} _{-1.35}$ $\rm0.32^{+0.04} _{-\it u}$ $\rm0.15^{+0.33} _{-0.08}$ $\rm 6.52^{+0.18} _{-0.18}$ 70.30 100.39(89), 0.192
SAX 1997 A+PL $\rm 1.74^{+0.09} _{-0.08}$ - - - - - - 48.36(53), 0.655
  A+PEXRAV+G $\rm 1.77^{+0.70} _{-0.13}$ 240.00f <8.78 - - 6.40f <1 48.16(51), 0.587
  A+COMPHA+G - - 2.50f $\rm0.48^{+0.04} _{-\it u}$ $\rm0.05^{+\it u} _{-u}$ 6.40f <1 47.66(51), 0.607
SAX 2002 A+PL $\rm 1.69^{+0.07} _{-0.07}$ - - - - - - 49.91(53), 0.595
  A+PEXRAV+G $\rm 1.80^{+0.25} _{-0.16}$ $\rm 228.30^{+\it u} _{-193.00}$ <3.47 - - 6.40f 34.90 46.89(50), 0.599
  A+COMPHA+G - - $\rm 2.43^{+4.41} _{-1.97}$ $\rm0.37^{+0.13} _{-0.09}$ $\rm0.19^{+\it u} _{-u}$ 6.40f 38.90 46.27(50), 0.624
XMM 2000 A+PEXRAV+G $\rm 1.73^{+0.14} _{-0.14}$ 500.00f $\rm0.48^{+1.09} _{-0.48}$ - - 6.40f 75 75.24(54), 0.029
f Parameters fixed in the fit.
u Unbounded parameters.

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