A hard medium survey with ASCA

IV. The radio-loud type 2 QSO AX J0843+2942

¹ Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy e-mail: braito@brera.mi.astro.it; caccia@brera.mi.astro.it; tommaso@brera.mi.astro.it; paola@brera.mi.astro.it; anna@brera.mi.astro.it
² Dipartimento di Astronomia, Università degli Studi di Padova, vicolo dell'Osservatorio 2, 35122 Padova, Italy
³ INTEGRAL Science Data Centre, Chemin d'Ecogia 16, 1290 Versoix, Switzerland e-mail: Volker.Beckmann@obs.unige.ch
⁴ Dipartimento di Scienze, Università dell'Insubria, Como, Italy e-mail: ilaria.cagnoni@uninsubria.it
⁵ Istituto di Radioastronomia CNR, via P Gobetti 101, 40129, Bologna, Italy e-mail: gioia@ira.cnr.it

Corresponding author: R. Della Ceca, rdc@brera.mi.astro.it

Received: 27 February 2003
Accepted: 16 May 2003

Abstract

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 power-law model with a photon index of  and intrinsic absorbing column density of  cm^-2. The intrinsic luminosity in the 0.5-10 keV energy band is  erg s^-1, well within the range of quasar luminosities. AX J0843+2942, positionally coincident with the core of a triple and strong ( Jy;  erg s^-1 Hz^-1) radio source, is spectroscopically identified with a Narrow Line object (intrinsic FWHM of all the permitted emission lines 1200 km s^-1) at , 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.