A hard medium survey with ASCA

R. Della Ceca; V. Braito; V. Beckmann; A. Caccianiga; I. Cagnoni; I. M. Gioia; T. Maccacaro; P. Severgnini; A. Wolter

doi:10.1051/0004-6361:20030800

Free Access

Issue		A&A Volume 406, Number 2, August I 2003


Page(s)		555 - 563
Section		Extragalactic astronomy
DOI		https://doi.org/10.1051/0004-6361:20030800
Published online		17 November 2003

A&A 406, 555-563 (2003)

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

R. Della Ceca¹, V. Braito¹^,2, V. Beckmann³, A. Caccianiga¹, I. Cagnoni⁴, I. M. Gioia⁵, T. Maccacaro¹, P. Severgnini¹ and A. Wolter¹

¹ Osservatorio Astronomico di Brera, via Brera 28, 20121 Milano, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. ; This email address is being protected from spambots. You need JavaScript enabled to view it. ; This email address is being protected from spambots. You need JavaScript enabled to view it. ; This email address is being protected from spambots. You need JavaScript enabled to view it. ; This email address is being protected from spambots. You need JavaScript enabled to view 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: This email address is being protected from spambots. You need JavaScript enabled to view it.
⁴ Dipartimento di Scienze, Università dell'Insubria, Como, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
⁵ Istituto di Radioastronomia CNR, via P Gobetti 101, 40129, Bologna, Italy e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Corresponding author: R. Della Ceca, This email address is being protected from spambots. You need JavaScript enabled to view 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 $Mathematical equation: $\Gamma = 1.72^{+0.3}_{-0.6}$$ and intrinsic absorbing column density of $Mathematical equation: $N_{\rm H} = 1.44^{+0.33}_{-0.52} \times 10^{23}$$ cm^-2. The intrinsic luminosity in the 0.5-10 keV energy band is $Mathematical equation: $\simeq$$ $Mathematical equation: $3\times 10^{45}$$ erg s^-1, well within the range of quasar luminosities. AX J0843+2942, positionally coincident with the core of a triple and strong ( $Mathematical equation: $S_{\rm 1.4~GHz} \sim 1$$ Jy; $Mathematical equation: $P_{\rm 1.4~GHz} \sim 9\times 10^{33}$$ erg s^-1 Hz^-1) radio source, is spectroscopically identified with a Narrow Line object (intrinsic FWHM of all the permitted emission lines $Mathematical equation: $\la$$ 1200 km s^-1) at Mathematical equation: $z=0.398$ , 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.

Key words: galaxies: active / quasars: individual: AX J0843+2942 / X-rays: galaxies / X-rays: individual: AX J0843+2942

© ESO, 2003

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.