Suzaku observations of two narrow-line radio galaxies (3C 403 and IC 5063)

We report the results of Suzaku broad band X-ray observations of the two narrow-line radio galaxies (NLRGs), 3C 403 and IC 5063. Combined with the Swift/BAT spectra averaged for 58 months, we are able to accurately constrain their spectral properties over the 0.5-200 keV band. The spectra from the nucleus are well represented with an absorbed cut-off power law, a mildly absorbed reflection component from cold matter with an iron-K emission line, and an unabsorbed soft component, which gives a firm upper limit for the scattered emission. The reflection strength normalized to the averaged BAT flux is R(≡Ω/2π)~0:6 in both targets, implying that their tori have a sufficiently large solid angle to produce the reprocessed emission. The numerical torus model with an opening angle of ~50 degrees by Ikeda et al. (2009, ApJ, 692, 608) well reproduces the observed spectra. We discuss the possibility that the amount of the normal gas responsible for Thomson scattering is systematically smaller in radio galaxies compa...