Table 2: Results of phase-integrated spectroscopy.
  pn MOS1 MOS2
$N_{\rm H}$ (1021 cm-2) $ 1.0\pm0.1$ $ 1.4\pm0.1$ $1.3\pm0.1$

$kT_{\rm BB1}$ (keV)		 0.164 $\pm$ 0.001 0.165 $\pm$ 0.002 0.168 $\pm$ 0.002

$R_{\rm BB1}^{(a)}$ (km)		 4.5 $\pm$ 0.1 4.6 $\pm$ 0.1 4.6 $\pm$ 0.1

$kT_{\rm BB2}$ (keV)		 0.319 $\pm$ 0.002 0.322 $\pm$ 0.002 0.320 $\pm$ 0.002

$R_{\rm BB2}^{(a)}$ (km)		 0.83 $\pm$ 0.02 0.83 $\pm$ 0.03 0.83 $\pm$ 0.03

E1 (keV)		 0.68 $\pm$ 0.01 $0.69\pm0.01$ $0.69\pm0.01$

a1		 $\rm 77^{+2}_{-3}$ 80 $\pm$ 3 82 $\pm$ 3

b1		 $\rm -368^{+7}_{-22}$ $-419\pm15$ $-412\pm15$

c1		 $\rm 616^{+26}_{-44}$ 749 $\pm$ 40 684 $\pm$ 40

EW1 (eV)		 $\rm 99^{+4}_{-7}$ $\rm 105^{+6}_{-7}$ $\rm 104^{+6}_{-7}$

FWHM1 (keV)		 $0.24\pm0.01$ $0.24 \pm0.02$ $0.24 \pm0.02$

E2 (keV)		 1.36 $\pm$ 0.01 $1.39 \pm0.02$ $1.37\pm0.02$

a2		 $\rm 96^{+8}_{-32}$ $\rm 89^{+33}_{-11}$ $\rm 96^{+27}_{-8}$

b2		 -370+50-20 -360+250-30 -220+270-35

c2		 $\rm 488^{+145}_{-55}$ $\rm 220^{+1000}_{-55}$ $\rm 500^{+1000}_{-80}$

EW2 (eV)		 $66\pm6$ $64\pm7$ $67\pm7$

FWHM2 (keV)		 $0.18\pm0.02$ $0.19\pm0.03$ $0.20\pm0.03$

E3 (keV)		 2.14 $\pm$ 0.03 2.12 $\pm$ 0.07 2.12 $\pm$ 0.08

$\sigma_{3}$ (keV)		 0.17 $\pm$ 0.03 $\rm0.13^{+0.10}_{-0.04}$ $\rm0.10^{+0.10}_{-0.04}$

EW3 (eV)		 $94\pm15$ $48\pm20$ $45\pm20$

E4 (keV)		 2.83 $\pm$ 0.05 - -

$\sigma_{4}$ (keV)		 $\rm0.11^{+0.10}_{-0.04}$ - -

EW4 (eV)		 $\rm 81^{+20}_{-30}$ - -

$F_{\rm0.3{-}4~keV}^{(b)}$ (erg cm-2 s-1)		 $2.24\times10^{-12}$ $2.10\times10^{-12}$ $2.17\times10^{-12}$

$L_{\rm X}^{(c)}$ (erg s-1)		 $2.1\times10^{33}$ $2.2\times10^{33}$ $2.2\times10^{33}$

$\chi^{2}$/d.o.f.		 1.15 1.19 1.47

d.o.f.		 94 154 151
a Radius at infinity for an assumed distance of 2 kpc.
b Observed flux.
c Bolometric luminosity for d=2 kpc.
All the errors are at the 90% c.l. for a single interesting parameter.

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