NUCLEAR X-RAY PROPERTIES OF THE PECULIAR RADIO-LOUD HIDDEN AGN 4C+29.30

We present results from a study of nuclear emission from a nearby radio galaxy, 4C+29.30, over a broad 0.5-200 keV X-ray band. This study used new XMM-Newton (similar to 17 ks) and Chandra (similar to 300 ks) data, and archival Swift/BAT data from the 58 month catalog. The hard (>2 keV) X-ray spectrum of 4C+29.30 can be decomposed into an intrinsic hard power law (Gamma similar to 1.56) modified by a cold absorber with an intrinsic column density N-H,N- z similar to 5 x 10(23) cm(-2), and its reflection (vertical bar Omega/2 pi vertical bar similar to 0.3) from a neutral matter including a narrow iron K alpha emission line at a rest-frame energy similar to 6.4 keV. The reflected component is less absorbed than the intrinsic one with an upper limit on the absorbing column of N-H, z(refl) < 2.5 x 10(22) cm(-2). The X-ray spectrum varied between the XMM-Newton and Chandra observations. We show that a scenario invoking variations of the normalization of the power law is favored over a model with variable intrinsic column density. X-rays in the 0.5-2 keV band are dominated by diffuse emission modeled with a thermal bremsstrahlung component with temperature similar to 0.7 keV, and contain only a marginal contribution from the scattered power-law component. We hypothesize that 4C+29.30 belongs to a class of hidden active galactic nuclei containing a geometrically thick torus. However, unlike the majority of hidden AGNs, 4C+29.30 is radio-loud. Correlations between the scattering fraction and Eddington luminosity ratio, and between black hole mass and stellar velocity dispersion, imply that 4C+29.30 hosts a black hole with similar to 10(8) M-circle dot mass.