Table 4: Spectral analysis of BeppoSAX data.
Model Parameters

A: pl

 $\chi^2/\nu$ = 49.62/43
$\Gamma $ $2.15 \pm 0.15$

B: mekal

 $\chi^2/\nu$ = 50.24/43
kT (keV) $4.09 \pm 0.77$
Z $(Z_\odot)$ 1.0 (f)

C: pl+Gauss

 $\chi^2/\nu$ = 38.63/41
$\Gamma $ $2.27 \pm 0.17$
Line: $\sigma_{\rm E}$; E(keV); EW (keV) 0.0 (f); $6.46 \pm 0.55$; $1.87 \pm 0.60$

D: mekal+pl+Gauss

 $\chi^2/\nu$ = 33.46/39
kT (keV) $0.23 \pm 0.05$
Z $(Z_\odot)$ 1.0 (f)
$\Gamma $ $2.13 \pm 0.19$
Line: $\sigma_{E}$; E(keV); EW (keV) 0.0 (f); $6.48 \pm 0.11$; $1.66 \pm 0.50$


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