Abstract The study of X-ray sources in globular clusters is in very rapid progress, thanks to the combined observations of Chandra and XMM X-ray observatories, and the Hubble Space Telescope. In addition to the low-mass X-ray binaries known since the early 1970s, quiescent X-ray binaries, cataclysmic variables, radio pulsars, and magnetically active binaries can now be identified and studied in X-rays and optical. This improves our knowledge of the population of binaries in globular clusters.
Keywords stars: X-ray sources - globular clusters
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