The X-ray variability of active galactic nuclei

  • R. S. Warwick
Block Holes
Part of the Lecture Notes in Physics book series (LNP, volume 266)


Recent results relating to the X-ray variability exhibited by active galactic nuclei are reviewed. EXOSAT observations have established, contrary to earlier indications, that X-ray variability on a timescale of an hour or less is a relatively common feature of such sources. It is argued that the minimum variability timescale may be a direct indicator of the mass of the black hole in an active galactic nucleus. In some active galaxies the central black hole mass may be ≤107 M.


Black Hole Light Curve Active Galactic Nucleus Active Galaxy Broad Line Region 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • R. S. Warwick
    • 1
  1. 1.X-ray Astronomy Group, Physics DepartmentUniversity of LeicesterLeicesterEngland

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