New results on optical identifications of INTEGRAL sources

NICOLA MASETTI, L. Morelli, E. Palazzi, G. Galaz, L. Bassani, A. Bazzano, A. J. Bird, A. J. Dean, G. L. Israel, R. Landi, A. Malizia, D. Minniti, J. B. Stephen, F. Schiavone, P. Ubertini, R. Walter

Research output: Contribution to journalConference articlepeer-review


Optical spectroscopic identification of the nature of 21 unidentified southern hard X-ray objects is reported here in the framework of our campaign aimed at determining the nature of newly-discovered and/or unidentified sources detected by INTEGRAL. Our results show that 12 of these objects are Active Galactic Nuclei (AGNs), 5 are magnetic Cataclysmic Variables (CVs), and 4 are High-Mass X-ray Binaries (HMXBs), one of which is in the Large Magellanic Cloud. These identifications further underscore the importance of INTEGRAL in the study of the hard X-ray spectrum of AGNs, HMXBs and CVs, and the usefulness of a strategy of catalogues crosscorrelation plus optical spectroscopy to unveil the nature of the X-ray sources detected with INTEGRAL.

Original languageEnglish
Pages (from-to)287-290
Number of pages4
JournalEuropean Space Agency, (Special Publication) ESA SP
Issue number622 SP
Publication statusPublished - Jul 2006
Event6th Integral Workshop - The Obscured Universe - Moscow, Russian Federation
Duration: 2 Jul 20068 Jul 2006


  • Galaxies: Seyfert
  • Stars: Novae, cataclysmic variables
  • Techniques: Spectroscopic
  • X-rays: Binaries
  • X-rays: Individuals

ASJC Scopus subject areas

  • Aerospace Engineering


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