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An enshrouded AGN in the merging starburst system Arp~299 revealed by BeppoSAX

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arxiv astro-ph/0211077 v1 pith:KIR62FJY submitted 2002-11-05 astro-ph

R. Della Ceca , L. Ballo , F. Tavecchio , L. Maraschi , P.O. Petrucci , L. Bassani , M. Cappi , M. Dadina
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A. Franceschini G. Malaguti G.G.C. Palumbo M. Persic
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classification astro-ph
keywords starburstbepposaxmergingsystemx-rayassociatedbroad-bandburied
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Using a long (=150 ksec), broad-band (0.1--40 keV) BeppoSAX observation of the merging starburst system Arp 299 (=IC 694 + NGC 3690) we found the first unambiguous evidence of the presence of a deeply buried (N_H = 2.5E24 cm-2) AGN having an intrinsic luminosity of L(0.5-100 keV) = 1.9E43 cgs. The X-ray spectral properties of this AGN are discussed in detail as well as the thermal component detected at soft X-ray energies which, most likely, is associated with the starburst.

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