A Hard Medium Survey with ASCA . IV . : the Radio - Loud Type 2 QSO AX J 0843 + 2942

We discuss the X-ray, optical and radio properties of AX J0843+2942, a high luminosity Type 2 AGN found in the ASCA Hard Serendipitous Survey. The X-ray spectrum is best described by an absorbed powerlaw model with photon index of Γ = 1.72 −0.6 and intrinsic absorbing column density of NH = 1.44 +0.33 −0.52 × 10 23 cm. The intrinsic luminosity in the 0.5 – 10 keV energy band is ≃ 3× 10 ergs s , well within the range of quasar luminosities. AX J0843+2942, positionally coincident with the core of a triple and strong (S1.4GHz ∼ 1 Jy; P1.4GHz ∼ 9×10 33 erg s Hz) radio source, is spectroscopically identified with a Narrow Line object (intrinsic FWHM of all the permitted emission lines < ∼ 1200 km s) at z=0.398, having line features and ratios typical of Seyfert-2 like objects. The high X-ray luminosity, coupled with the high intrinsic absorption, the optical spectral properties and the radio power, allow us to propose AX J0843+2942 as a Radio-Loud “Type 2 QSO”. A discussion of the SED of this object is presented here together with a comparison with the SED of Ultra Luminous Infrared Galaxies, other “Type 2 QSO” candidates from the literature, and “normal” Radio-Quiet and Radio-Loud QSOs.