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Table 2:

EPIC-RGS spectral fits to the persistent emission.

Par/component 		OBS 1 OBS 2 Average value
absorber      
$N_{\rm H}$  ( $10^{25} ~ {\rm m}^{-2}$) $ 3.65 \pm 0.05 $ $ 3.68 \pm 0.04 $ $ 3.67 \pm 0.03 $
kT   (10-4 keV) $ 7.07 \pm 0.10 $ $ 7.22 \pm 0.09 $ $ 7.15 \pm 0.07 $
O $ 1.471 \pm 0.008 $ $ 1.403 \pm 0.008 $ $ 1.437 \pm 0.006 $
Ne $ 2.72 \pm 0.04 $ $ 2.64 \pm 0.04 $ $ 2.68 \pm 0.03 $
Mg $ 0.81 \pm 0.09 $ $ 0.80 \pm 0.09 $ $ 0.80 \pm 0.06 $
Fe $ 1.90 \pm 0.03 $ $ 2.01 \pm 0.02 $ $ 1.98 \pm 0.02 $
blackbody      
flux (10-13 W m-2) 0.65 $\pm$ 0.10 0.55 $\pm$ 0.03 0.56 $\pm$ 0.03
$kT_{\rm bb}$(keV) $ 0.170 \pm 0.002 $ $ 0.167 \pm 0.002 $ $ 0.168 \pm 0.001 $
C1 comptonization      
flux (10-13 W m-2) 7.8 $\pm$ 0.3 7.7 $\pm$ 0.3 7.75 $\pm$ 0.21
$kT_{\rm s} $(keV) $ 0.25 \pm 0.02 $ $ 0.24 \pm 0.01 $ $ 0.24 \pm 0.01 $
$kT_{\rm e} $(keV) $ 2.07 \pm 0.05 $ $ 2.38 \pm 0.06 $ $ 2.20 \pm 0.04 $
$ \tau $ $ 11.0 \pm 0.6 $ $ 9.3 \pm 0.4 $ $ 9.8 \pm 0.3 $
C2 comptonization      
flux (10-13 W m-2) 0.9 $\pm$ 0.1 0.6 $\pm$ 0.1 0.75 $\pm$ 0.07
$kT_{\rm s} $(keV) $ 0.50 \pm 0.01 $ $ 0.54 \pm 0.01 $ $ 0.52 \pm 0.01 $
$kT_{\rm e} $(keV) $ 9.4 \pm 0.8 $ $ 4.6 \pm 0.5 $ $ 5.9 \pm 0.4 $
$ \tau $ $\leq$0.5 $\leq$0.7 -
$C_{\rm stat}$/ d.o.f. 2451 / 1705 2579 / 1710 -

Notes. Abundances are relative to the protosolar values of Lodders (2003). Fluxes are derived in the 0.3-10 keV band. We also report the weighted averages between the two observations. See also Fig. 3.


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