Table 2: Spectral fit results. Errors on the fit parameters are 68% confidence limits, upper limits represent 95% confidence limits. The 3-10 and 10-25 keV fluxes are unabsorbed.
Parameter Obs. 1 Obs. 2
$N_{\rm H}$ (atoms cm-2) [2.5ex][.0ex] 2.9 1022 (fixed) 2.9 1022 (fixed)
kTW (keV) 0.98 $\pm$ 0.02 0.92 $\pm$ 0.01
$kT_{\rm e}$ (keV) 2.88 $\pm$ 0.06 3.04 $\pm$ 0.04
$\tau$ 7.2 $\pm$ 0.2 8.10 $\pm$ 0.15
RW (km) 21.7 $\pm$ 0.9 27.2 $\pm$ 0.7
$E_{{\rm FE}}$ (keV) 6.42 (fixed) 6.42 (fixed)
FWHM (keV) 0.78 $\pm$ 0.13 0.4 +0.2-0.4
Fe EW (eV) 223 <96
$E_{{\rm edge}}$ (keV) 9.1 $\pm$ 0.1 9.1 (fixed)
$\tau_{{\rm edge}}$ 0.12 $\pm$ 0.03 <0.03
F3-10 (ergs cm-2s-1) $1.5 \times 10^{-8}$ $2.0 \times 10^{-8}$
F10-25 (ergs cm-2s-1) $1.8 \times 10^{-9}$ $3.6 \times 10^{-9}$
$\chi^2_{{\rm red}}$ (d.o.f.) 0.6 (40) 0.9 (41)
Fit parameters of the comptt model - kTW: input soft photon (Wien) temperature - $kT_{\rm e}$: plasma temperature - $\tau$: plasma optical depth - RW: effective Wien radius for the soft seed photons (in 't Zand et al. 1999), here derived for an assumed distance of 7 kpc.

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