BeppoSAX unveils the nuclear component in NGC 6240

P. Vignati, S. Molendi, G. Matt, M. Guainazzi, L. A. Antonelli, L. Bassani, W. N. Brandt, A. C. Fabian, K. Iwasawa, R. Maiolino, G. Malaguti, A. Marconi, G. G. Perola

Research output: Contribution to journalReview articlepeer-review

142 Scopus citations


The direct nuclear X-ray emission of the ultraluminous IRAS galaxy NGC 6240 has been observed by BeppoSAX. It is seen through an absorber with NH ∼ 2 × 1024 cm-2. The 2-10 keV X-ray luminosity of > 1044 erg s-1 definitely proves that a powerful AGN is hosted in this galaxy, despite the LINER optical appearance. Assuming the typical LX/Lbol ratio for quasars, our result implies that it is the AGN and not the starburst that dominates the energy output of NGC 6240.

Original languageEnglish (US)
Pages (from-to)L57-L60
JournalAstronomy and Astrophysics
Issue number2
StatePublished - 1999

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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