Unveiling the nature of INTEGRAL objects through optical spectroscopy V. Identification and properties of 21 southern hard X-ray sources

N. 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, F. Schiavone, J. B. Stephen, P. Ubertini, R. Walter

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

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 5 of these objects are magnetic Cataclysmic Variables (CVs), 4 are High-Mass X-ray Binaries (HMXBs; one of which is in the Large Magellanic Cloud) and 12 are Active Galactic Nuclei (AGNs). When feasible, the main physical parameters for these hard X-ray sources are also computed using the multiwavelength information available in the literature. 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 cross-correlation plus optical spectroscopy to securely pinpoint the actual nature of the X-ray sources detected with INTEGRAL.

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalAstronomy and Astrophysics
Volume459
Issue number1
DOIs
Publication statusPublished - 1 Nov 2006

Keywords

  • Galaxies: Seyfert
  • Stars: novae, cataclysmic variables
  • Techniques: spectroscopic
  • X-rays: binaries
  • X-rays: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Masetti, N., Morelli, L., Palazzi, E., Galaz, G., Bassani, L., Bazzano, A., Bird, A. J., Dean, A. J., Israel, G. L., Landi, R., Malizia, A., Minniti, D., Schiavone, F., Stephen, J. B., Ubertini, P., & Walter, R. (2006). Unveiling the nature of INTEGRAL objects through optical spectroscopy V. Identification and properties of 21 southern hard X-ray sources. Astronomy and Astrophysics, 459(1), 21-30. https://doi.org/10.1051/0004-6361:20066055