X-ray spectroscopy of the Compton-thick Seyfert 2 ESO 138 − G1

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Table 1

Best-fit spectral parameters for the hard X-ray (3.5−10 keV) continuum of ESO 138−G1.

Parameter	Model RD^†	Model TD^†

Γ^a	1.8^‡
Norm^b
N^c_H	−
F^d₂₋₁₀	2.3	2.1
L^e₂₋₁₀	4.3	9.6
(d.o.f.)^f	1.04(75)	1.14(73)

Notes. See Sect. 3.1 for details.

^(†)

Spectral model: RD (reflection-dominated), TD (transmission-dominated);

^(a)

photon index of primary continuum;

^(b)

normalization of the reflection (RD) or absorbed power-law component (TD) (10^-3 photons keV^-1 cm^-2 s^-1 at 1 keV);

^(c)

column density of the absorber (10²³ cm^-2);

^(d)

2–10 keV flux (10^-12 erg cm^-2 s^-1);

^(e)

2–10 keV luminosity (10⁴¹ erg s^-1);

^(f)

reduced χ² and number of degrees of freedom.

^(‡)

Fixed value (see text for details).

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