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The Ultra Luminous Infrared Galaxy MKN 231: New clues from BeppoSAX and XMM-Newton

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arxiv astro-ph/0307551 v1 pith:Q3M42UB4 submitted 2003-07-31 astro-ph

The Ultra Luminous Infrared Galaxy MKN 231: New clues from BeppoSAX and XMM-Newton

classification astro-ph
keywords bepposaxactivitycontributesinfraredluminosityobservationsstarburstxmm-newton
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We present BeppoSAX and XMM-Newton observations of MKN 231. These observations and in particular the BeppoSAX PDS data allowed us to unveil, for the first time, the highly absorbed (N$_H\sim 2\times10^{24}$ cm$^{-2}$) AGN component. We find that: a) the AGN powering MKN231 has an intrinsic 2-10 keV luminosity of $1^{+1}_{-0.5}\times 10^{44}$ erg/s; b) the strong starburst activity contributes significantly in the 0.1-10 keV energy range. We propose that the starburst activity strongly contributes to the far infrared luminosity of MKN 231; this is also suggested by the multiwavelength properties of MKN 231.

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