Table 1: Best fit parameters for the EPIC-pn spectrum of Cyg X-2 in the energy band 0.4-10 keV, with a disk black body at temperature $kT_{\rm db}$ ( DISKBB in XSPEC, Mitsuda et al. 1984) and a comptonized spectrum ( COMPTT in XSPEC, Titarchuk 1994), affected by extinction of gas and dust ( TBABS in XSPEC, Wilms et al. 2000). See text for the definition of the parameters. Errors are given at 90% confidence level for one interesting parameter.
$N_{\rm H}\ (\times10^{22}\ {\rm cm^{-2})}$ $0.19\pm 0.05$

$kT_{\rm db}\ {\rm (keV)}$ $0.36\pm 0.05$

$kT_0\ {\rm (keV)}$ $0.81\pm 0.03$

$kT\ {\rm (keV)}$ $6.2\pm0.1$

$\tau$ $1.62\pm 0.07$

$E_{\rm Fe}~{\rm (keV)}$ $6.67 \pm 0.16$

$\sigma_{\rm Fe}~{\rm (keV)}$ 0.2^+0.3_-0.1

${\it EW}_{\rm Fe}~{\rm (eV)}$ $73\pm 53$

$\chi^2/\rm d.o.f.$ 1115/1111

**Table 1:** Best fit parameters for the EPIC-pn spectrum of Cyg X-2 in the energy band 0.4-10 keV, with a disk black body at temperature $kT_{\rm db}$ ( `DISKBB` in XSPEC, Mitsuda et al. 1984) and a comptonized spectrum ( `COMPTT` in XSPEC, Titarchuk 1994), affected by extinction of gas and dust ( `TBABS` in XSPEC, Wilms et al. 2000). See text for the definition of the parameters. Errors are given at 90% confidence level for one interesting parameter.
$N_{\rm H}\ (\times10^{22}\ {\rm cm^{-2})}$	$0.19\pm 0.05$
$kT_{\rm db}\ {\rm (keV)}$	$0.36\pm 0.05$
$kT_0\ {\rm (keV)}$	$0.81\pm 0.03$
$kT\ {\rm (keV)}$	$6.2\pm0.1$
$\tau$	$1.62\pm 0.07$
$E_{\rm Fe}~{\rm (keV)}$	$6.67 \pm 0.16$
$\sigma_{\rm Fe}~{\rm (keV)}$	0.2^+0.3_-0.1
${\it EW}_{\rm Fe}~{\rm (eV)}$	$73\pm 53$
$\chi^2/\rm d.o.f.$	1115/1111

Source LaTeX | All tables | In the text

	1 Introduction
	2 The halo theory
	3 Data analysis
	4 The analysis of the scattering halo
	5 The halo modeling
	6 Discussion
	7 Conclusions
	References