A4 Refereed article in a conference publication
Time-domain behavior of blazar OJ 287 and the binary supermassive black hole conjecture
Authors: Ciprini S., Valtonen M., Zola S., Goyal A., Pihajoki P.
Editors: No available
Conference name: Fermi Symposium
Publisher: Sissa Medialab Srl
Publication year: 2017
Journal: POS Proceedings of Science
Book title : 7th International Fermi Symposium (IFS2017)
Journal name in source: Proceedings of Science
Series title: Proceedings of Science
ISSN: 1824-8039
Web address : https://pos.sissa.it/312/041/pdf(external)
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/29621709(external)
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 (longterm) 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.
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