Wide-band spectroscopy of the Compton thick Seyfert 2 galaxy Markarian 3 with Suzaku

We obtained a wide-band spectrum of the Compton-thick Seyfert 2 galaxy Mkn 3 with Suzaku. The observed spectrum was clearly resolved into weak, soft power-law emission, a heavily absorbed power-law component, cold reflection, and many emission lines. The heavily absorbed component, absorbed by gas with a column density of 1. 1 x 10(24) cm(-2), has an intrinsic 2-10 keV luminosity of similar to 1. 6 x 10(43) erg s(-1), and is considered to be direct emission from the Mkn 3 nucleus. The reflection component was interpreted as being the reflection of direct light off a cold, thick material; the reflection fraction, R, was 1.36 +/- 0.20. The cold material is inferred to be located > 1 pc from the central black hole of Mkn 3, due to the low ionization parameter of iron ( xi I erg cm s(-1)) and the narrow iron line width (sigma < 22 eV). The weak, soft power-law emission is considered to be scattered light by ionized gas with a scattering fraction of 0.9 +/- 0.2%. The existence of many highly ionized lines in the observed spectrum indicates that the ionized gas has a broad ionized structure, with xi = 10-1000 erg cm s(-1). This high-quality spectrum obtained by Suzaku can be considered to be a template for studies of Seyfert 2 galaxies.