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Long Term Periodicity Analysis of OJ 287 at Optical V Waveband

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Abstract

BL Lacertae object OJ 287 is one of the blazar that shows convincing evidence to support periodic variations. We have collected V band data for OJ 287 from 1891 to 2010, from the University of Michigan Radio Observatory (UMRAO) database and the available literature. Based on the spectral estimate theory, this paper used the periodogram spectral estimate, the maximum entropy spectral estimate and bispectrum spectral estimate methods. Applying these methods to the periodic analysis of OJ 287, we find the most eminent period as 12.1 yr. The results confirm that the variability period of OJ 287 in the optical V band is in agreement with the radio variability period of about 12 years.

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Acknowledgements

This work is supported by the National Nature Science Foundation of China (U1231202, 11063004), the innovation team of gravitation theory research in Yunnan Normal University (2011CI127), the innovation team of High Energy Astrophysics Science and Technology in Yunnan Province Universities, the Science Foundation of Yunnan Province of China (2010CD016, 2012FB140).

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Authors and Affiliations

  1. School of Physics and Telecommunication Engineering, Shaanxi University of Technology, Shaanxi, 723001, China

    Jie Tang & Qiao Pang

  2. Yunnan Astronomical Observatory, National Astronomical Observatory, Chinese Academy of Sciences, Kunming, Yunnan, 650011, China

    Hao-Jing Zhang

  3. College of Physics and Electronics, Yunnan Normal University, Kunming, Yunnan, 650092, China

    Hao-Jing Zhang

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  1. Jie Tang
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  2. Hao-Jing Zhang
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  3. Qiao Pang
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Correspondence to Jie Tang.

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Tang, J., Zhang, HJ. & Pang, Q. Long Term Periodicity Analysis of OJ 287 at Optical V Waveband. J Astrophys Astron 35, 301–305 (2014). https://doi.org/10.1007/s12036-014-9218-8

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  • DOI: https://doi.org/10.1007/s12036-014-9218-8

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