Volume 420, Number 1, June II 2004
|Page(s)||79 - 88|
|Published online||14 May 2004|
The XMM-Newton and BeppoSAX view of the Ultra Luminous Infrared Galaxy MKN 231
INAF – Osservatorio Astronomico di Brera, Milano, Italy
2 Dipartimento di Astronomia, Università di Padova, Italy
3 IASF – CNR, Bologna, Italy
4 XMM-SOC (VILSPA), ESA, Madrid, Spain
5 Institute of Astronomy, University of Cambridge, Madingley Road Cambridge CB3 OHA, UK
6 INAF – Osservatorio Astronomico di Padova, Italy
7 Dipartimento di Astronomia, Università di Bologna, Italy
8 INAF – Osservatorio Astronomico di Trieste, Italy
9 INAF – Osservatorio Astrofisico di Arcetri, Firenze, Italy
10 Harvard-Smithsonian Center for Astrophysics, Cambridge, USA
Corresponding author: V. Braito, firstname.lastname@example.org
Accepted: 15 January 2004
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.
Key words: X-rays: galaxies / galaxies: individual: Markarian 231
© ESO, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.