Time-domain behavior of blazar OJ 287 and the binary supermassive black hole conjecture

S. Ciprini, M.J. Valtonen, S. Zola, A. Goyal, P. Pihajoki

Research output: Contribution to journalConference articleScientificpeer-review


The proper understanding of blazar variability at the various electromagnetic spectral bands is one goal of multifrequency astrophysics. In this frame a peculiar and controversial phenomenology is the periodicity, postulated for long-term radio or optical flux light curves of about a dozen of blazars. The well-known BL Lac object OJ 287 (PKS 0851+202, S3 0851+20, PG 0851+202, z = 0.306) is not only a high-variable, peculiar, extragalactic source with hints for approximatively cyclical optical outbursts, but it also represents a case of substantial intensive and extensive (long-term) multifrequency observations. This rich database allow us a deeper analysis based on a wide range of variability timescales with some recent results that are highlighted here. © Copyright owned by the author(s).
Original languageEnglish
Article number041
JournalPoS Proceedings of Science
Number of pages5
Publication statusPublished - 2017
MoE publication typeA4 Article in conference proceedings
EventInternational Fermi Symposium - Garmisch-Partenkirchen, Germany
Duration: 15 Oct 201720 Oct 2017
Conference number: 7

Fields of Science

  • Extragalactic sources
  • Light curves
  • Multi frequency
  • Optical flux
  • Spectral band
  • Supermassive black holes
  • Time domain
  • Time-scales, Astrophysics
  • 114 Physical sciences

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