A4 Refereed article in a conference publication

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




AuthorsCiprini S., Valtonen M., Zola S., Goyal A., Pihajoki P.

EditorsNo available

Conference nameFermi Symposium

PublisherSissa Medialab Srl

Publication year2017

JournalPOS Proceedings of Science

Book title 7th International Fermi Symposium (IFS2017)

Journal name in sourceProceedings of Science

Series titleProceedings of Science

ISSN1824-8039

Web address https://pos.sissa.it/312/041/pdf(external)

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/29621709(external)


Abstract

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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