2004/02/10 by V. Braito, R. Della Ceca, E. Piconcelli +11 · 7 citations
Physics and Astronomy · #Absorption (acoustics) #Adaptive optics and wavefront sensing #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Infrared #Luminosity #Optics #Physics #Redshift #astro-ph
paper · pdf · doi:10.1051/0004-6361:20040061
published as Astron.Astrophys. 420 (2004) 79-88 · 11 pages,3 figures, Latex manuscript, Accepted for publication in Astronomy and Astrophysics
arxiv created 2004/02/10 · openalex publication_date 2004/05/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss XMM-Newton and BeppoSAX observations of MKN 231, the lowest-redshift Broad Absorption Line (BAL) QSO known so far and one of the best-studied Ultra Luminous Infrared Galaxies. By combining the XMM-Newton spectral resolution and the high-energy bandpass of BeppoSAX we have been able to study in more detail than previously possible its 0.2–50 keV spectral properties. The BeppoSAX PDS data unveiled, for the first time, a highly absorbed ( cm-2) power-law component. We find that: a) below 10 keV we are seeing only reprocessed radiation through reflection and/or scattering; b) the intrinsic 2–10 keV luminosity of MKN 231 is erg s-1, i.e. more than an order of magnitude greater than previous measurements; c) the starburst activity significantly contributes to the soft ( keV) X-ray emission.