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The variability and periods in the BL Lac AO 0235+164

Published online by Cambridge University Press:  24 March 2015

J. H. Fan ,
O. Kurtanidze ,
X. Liu ,
Y. Liu ,
H. T. Wang ,
Y. H. Yuan ,
J. M. Hao ,
D. X. Wu ,
W. Cai  and
H. B. Xiao
...Show all authors
J. H. Fan
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
O. Kurtanidze
Affiliation:
Abastumani Observatory, Mt. Kanobili, 0301 Abastumani, Georgia
X. Liu
Affiliation:
Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China
Y. Liu
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
H. T. Wang
Affiliation:
Faculty of Physics and Electronic Information, LangFang Teacher's College, China
Y. H. Yuan
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
J. M. Hao
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
D. X. Wu
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
W. Cai
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
H. B. Xiao
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
Z. Y. Pei
Affiliation:
Center for Astrophysics, Guangzhou University, Guangzhou 510006, China email: [email protected] Astronomy Science and Technology Research Laboratory of Department of Education of Guangdong Province, Guangzhou 510006, China
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Abstract

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Variability is one of the extreme observational properties of BL Lacertae objects. AO 0235+164 is a well studied BL Lac through the whole electro-magnetic wavebands, it is violently variable in the optical bands. In the present work, we show its optical R band photometric observations carried out during the period of Nov. 2006 to Dec. 2012 using the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at Abastumani Observatory, Georgia. It shows a large variation of ΔR = 4.88 mag (14.20 - 19.08 mag) during our monitoring period. When periodicity analysis methods are adopted to its R observations from our Abastumani monitoring programme and those in the literature, the signs of some periods, P1 = 8.26 yr, P2 = 0.55 yr, P3 = 0.85 yr, P4 = 1.99 yr are found.

Keywords

galaxies: BL Lacertae Objects: individual (AO 0235+164): photometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S313: Extragalactic jets from every angle , September 2014 , pp. 81 - 82
Copyright
Copyright © International Astronomical Union 2015 

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