Time-domain behavior of blazar OJ 287 and the binary supermassive black hole conjecture
S. Ciprini*,
M.J. Valtonen,
S. Zola,
A. Goyal and
P. Pihajoki*: corresponding author
Pre-published on:
December 12, 2017
Published on:
November 11, 2020
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 (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.
DOI: https://doi.org/10.22323/1.312.0041
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