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The XMM-Newton/2dF survey - II. The nature of X-ray-faint optically bright X-ray sources

Author
Georgakakis, A.; Georgantopoulos, I.; Vallbé, M.; Kolokotronis, V.; Basilakos, S.; Plionis, M.; Stewart, G. C.; Shanks, T.; Boyle, B. J.
Type of activity
Journal article
Journal
Monthly notices of the Royal Astronomical Society
Date of publication
2004-03-21
Volume
349
Number
1
First page
135
Last page
145
DOI
10.1111/j.1365-2966.2004.07465.x
Repository
http://hdl.handle.net/2117/134298 Open in new window
https://arxiv.org/abs/astro-ph/0311609 Open in new window
URL
https://academic.oup.com/mnras/article/349/1/135/3101540 Open in new window
Abstract
In this paper we investigate the properties of low X-ray-to-optical flux ratio sources detected in a wide area (2.5deg^2) shallow (f(0.5-8keV)~10e-14cgs) XMM-Newton survey. We find a total of 26 sources (5% of the total X-ray selected population) with log f_X/f_{opt}<-0.9 to the above flux limit. Optical spectroscopy is available for 20 of these low X-ray-to-optical flux ratio objects. Most of them are found to be associated with Galactic stars (total of 8) and broad line AGNs (total of 8).We al...
Citation
Georgakakis, A. [et al.]. The XMM-Newton/2dF survey - II. The nature of X-ray-faint optically bright X-ray sources. "Monthly notices of the Royal Astronomical Society", 21 Març 2004, vol. 349, núm. 1, p. 135-145.
Keywords
Surveys, X-rays, X-rays: galaxies

Participants

  • Georgakakis, Antonis  (author)
  • Georgantopoulos, Ioannis  (author)
  • Vallbe Mumbru, Marc  (author)
  • Kolokotronis, Vaggelis  (author)
  • Basilakos, Spyros  (author)
  • Plionis, Manolis  (author)
  • Stewart, Gordon C.  (author)
  • Shanks, Tom  (author)
  • Boyle, Brian J.  (author)

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