A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign
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Date
2016
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Abstract
We analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. No statistically significant periods were found in the high-frequency domain both in the ground-based data and in Kepler observations. In the longer-period domain, the Lomb-Scargle periodogram revealed several peaks above the 99% significance level. The longest one-about 95 days-corresponds to the innermost stable circular orbit (ISCO) period of the more massive black hole. The 43-day period could be an alias, or it can be attributed to accretion in the form of a two-armed spiral wave. © 2016 by the authors.
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Keywords
galaxies: active, BL Lacertae objects: individual (OJ287), supermassive black holes
Citation
Zola, S. et al. (2016): A Search for QPOs in the Blazar OJ287: Preliminary Results from
the 2015/2016 Observing Campaign. Galaxies, 4(4). DOI:
https://doi.org/10.3390/galaxies4040041