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

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

2003-07-31

arxiv.org/abs/astro-ph/0307551v1

Astronomy and Astrophysics

Astrophysics

4 pages, 2 fugures, Proc. of the meeting: "The Restless High-Energy Universe" (Amsterdam, The Netherlands), E.P.J. van den Heu

Scientific paper

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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