Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-08-23
Astronomy and Astrophysics
Astrophysics
To appear in A&A Letters
Scientific paper
The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed for the first time by BeppoSAX. It is seen through an absorber with N_H=2*10^{24} cm^{-2}. The 2-10 keV X-ray luminosity >10^{44} erg s^{-1} definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical L_X/L_bol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.
Antonelli Lucio Angelo
Bassani Loredana
Brandt Wiliam N.
Fabian Andrea C.
Guainazzi Matteo
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