Abstract
BL Lac object AO 0235+164 is a well-known object. We collect a large number of effective observation in B, V, R and I band from historical literatures. The possible periods are analyzed by means of discrete correlation function (DCF) method, structure function (SF) method and Jurkevich (J-K) method. The results show that there are possible periodic variations of 2.63–2.66 years in B band, 2.79–2.84 years in V band, 2.57–2.87 years in R band, 2.62–2.88 years in I band, respectively.
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Acknowledgements
We express our thanks to the people helping with this work. This work is supported by Colleges and universities in Hebei province science and technology research project (Grant No. Z2013065), LangFang Municipal Science and Technology Research and Development Program (No. 2012011002).
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Wang, H. The optical periodic analysis of BL Lac object AO 0235+164. Astrophys Space Sci 351, 281–287 (2014). https://doi.org/10.1007/s10509-014-1840-z
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DOI: https://doi.org/10.1007/s10509-014-1840-z