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Title:
Broad-band X-ray spectrum of the newly discovered broad-line radio galaxy IGR J21247+5058
Authors:
Molina, M.; Giroletti, M.; Malizia, A.; Landi, R.; Bassani, L.; Bird, A. J.; Dean, A. J.; de Rosa, A.; Fiocchi, M.; Panessa, F.
Affiliation:
AA(School of Physics and Astronomy, University of Southampton, SO17 1BJ, Southampton), AB(IRA/INAF, via Gobetti 101, I-40129 Bologna, Italy), AC(IASF/INAF, via Gobetti 101, I-40129 Bologna, Italy), AD(IASF/INAF, via Gobetti 101, I-40129 Bologna, Italy), AE(IASF/INAF, via Gobetti 101, I-40129 Bologna, Italy), AF(School of Physics and Astronomy, University of Southampton, SO17 1BJ, Southampton), AG(School of Physics and Astronomy, University of Southampton, SO17 1BJ, Southampton), AH(IASF/INAF, via Fosso del Cavaliere 100, I-00133 Rome, Italy), AI(IASF/INAF, via Fosso del Cavaliere 100, I-00133 Rome, Italy), AJ(Instituto de Fõsica de Cantabria (CSIC-UC), Avda. de los Castros, 39005 Santander, Spain)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 382, Issue 2, pp. 937-943. (MNRAS Homepage)
Publication Date:
12/2007
Origin:
MNRAS
MNRAS Keywords:
galaxies: active , galaxies: Seyfert , X-rays: galaxies
Abstract Copyright:
(c) 2007 The Authors. Journal compilation © 2007 RAS
DOI:
10.1111/j.1365-2966.2007.12464.x
Bibliographic Code:
2007MNRAS.382..937M

Abstract

In this paper, we present radio and high-energy observations of the INTEGRAL source IGR J21247+5058, a broad line emitting galaxy obscured by the Galactic plane. Archival Very Large Array radio data indicate that IGR J21247+5058 can be classified as an Faranoff-Riley type II Broad-Line Radio Galaxy. The spectrum between 610 MHz and 15 GHz is typical of synchrotron self-absorbed radiation with a peak at 8 GHz and a low-energy turnover; the core fraction is 0.1 suggestive of a moderate Doppler boosting of the base of the jet. The high-energy broad-band spectrum was obtained by combining XMM-Newton and Swift/X-Ray Telescope (XRT) observation with INTEGRAL/Image on Board Integral Satellite (IBIS) data. The 0.4-100-keV spectrum is well described by a power law, with slope Γ = 1.5, characterized by complex absorption due to two layers of material partially covering the source and a high-energy cut-off around 70-80 keV. Features such as a narrow iron line and a Compton reflection component, if present, are weak, suggesting that reprocessing of the power-law photons in the accretion disc plays a negligible role in the source.
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