Table 2: Summary of the spectral results in the 0.8-10 keV energy range. Errors are given at the 90% confidence level.

Obs.		 Model $N_{\rm H}$ $\Gamma$ $k_{\rm B} T$ $R_{\rm bb}$a Fluxb $\chi^{2}_{\rm r}$ (d.o.f.)
    (1022 $\rm cm^{-2}$)   (keV) (km) (10-11 erg cm-2 s-1)  
A PL $1.4\pm0.2$ $1.9\pm0.1$ - - $\rm0.92^{+0.04}_{-0.03}$ 1.60 (98)
  PL+BB $\rm 1.6^{+0.6}_{-0.4}$ $\rm0.9^{+0.3}_{-0.4}$ $0.5\pm0.1$ $\rm 4^{+2}_{-1}$ $1.0\pm0.1$ 1.12 (96)
  PL+BB 2.6 (fixed) $\rm 1.1^{+0.3}_{-0.2}$ $\rm0.44^{+0.03}_{-0.05}$ $\rm 7^{+2}_{-1}$ $1.11\pm0.06$ 1.16 (97)
B PL $2.4\pm0.2$ $2.2\pm0.1$ - - $2.6\pm0.1$ 1.22 (113)
  PL+BB $\rm 1.7^{+0.6}_{-0.5}$ $\rm 1.5^{+0.5}_{-0.6}$ $0.7\pm0.1$ $3\pm1$ $2.5\pm0.2$ 1.16 (111)
  PL+BB 2.6 (fixed) $2.0\pm0.2$ $0.5\pm0.1$ $5\pm2$ $2.7\pm0.2$ 1.21 (112)
C PL $\rm 2.0^{+0.4}_{-0.3}$ $2.3\pm0.1$ - - $0.95\pm0.04$ 1.29 (84)
  PL+BB $2\pm1$ $\rm 1.7^{+0.3}_{-0.6}$ $0.5\pm0.1$ $\rm 5^{+7}_{-2}$ $\rm 1.0^{+0.1}_{-0.2}$ 1.09 (82)
  PL+BB 2.6 (fixed) $1.7\pm0.3$ $0.45\pm0.05$ $\rm 6^{+2}_{-1}$ $1.1\pm0.1$ 1.08 (83)
D PL $2.1\pm0.3$ $2.4\pm0.1$ - - $0.90\pm0.05$ 1.06 (83)
  PL+BB $\rm 2.2^{+0.9}_{-0.7}$ $\rm 2.0^{+0.4}_{-0.5}$ $0.5\pm0.1$ $\rm 4^{+8}_{-2}$ $\rm0.9^{+0.1}_{-0.2}$ 1.00 (81)
  PL+BB 2.6 (fixed) $2.1\pm0.3$ $0.4\pm0.1$ $\rm 7^{+4}_{-2}$ $1.0\pm0.1$ 0.99 (82)
E PL $3.6\pm0.2$ $2.2\pm0.1$ - - $3.5\pm0.1$ 1.18 (121)
  PL+BB $\rm 2.6^{+0.7}_{-0.9}$ $\rm 1.8^{+0.3}_{-0.8}$ $\rm0.9^{+0.2}_{-0.1}$ $\rm 1.6^{+0.6}_{-0.8}$ $\rm 3.1^{+0.3}_{-0.2}$ 1.13 (119)
  PL+BB 2.6 (fixed) $\rm 1.7^{+0.1}_{-0.2}$ $0.9\pm0.1$ $\rm 1.7^{+0.4}_{-0.5}$ $3.1\pm0.2$ 1.12 (120)
F PL $\rm 2.4^{+0.3}_{-0.2}$ $2.3\pm0.1$ - - $\rm 1.06^{+0.04}_{-0.03}$ 1.35 (105)
  PL+BB $\rm 2.4^{+0.8}_{-0.5}$ $1.4\pm0.4$ $0.5\pm0.1$ $\rm 5^{+3}_{-1}$ $\rm 1.1^{+0.1}_{-0.2}$ 1.06 (103)
  PL+BB 2.6 (fixed) $1.5\pm0.3$ $\rm0.51^{+0.03}_{-0.05}$ $5\pm1$ $1.1\pm0.1$ 1.05 (104)
I PL $1.9\pm0.3$ $2.4\pm0.1$ - - $0.62\pm0.03$ 1.06 (94)
  PL+BB $3\pm1$ $2.2\pm0.3$ $0.3\pm0.1$ $\rm 8^{+25}_{-4}$ $\rm0.73^{+0.04}_{-0.09}$ 0.94 (92)
  PL+BB 2.6 (fixed) $2.1\pm0.2$ $\rm0.37^{+0.04}_{-0.06}$ $\rm 8^{+4}_{-2}$ $0.69\pm0.04$ 0.93 (93)
a Radius at infinity assuming a distance of 15 kpc.
b Flux in the 2-10 keV range, corrected for the absorption.


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