The Variability and Period Analysis for the BL Lac AO 0235+164
arXiv:1702.05689 · doi:10.3847/1538-4357/aa5def
Abstract
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. 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 meniscus telescope at Abastumani Observatory, Georgia. It shows a large variation of = 4.88 mag (14.19 - 19.07 mag) and a short time scale of = 73.5 min during our monitoring period. During the period of Dec. 2006 to Nov. 2009, we made radio observations of the source using the 25-m radio telescope at Xinjiang Astronomical Observatory. When a discrete correlation function (DCF) is adopted to the optical and radio observations, we found that the optical variation leads the radio variation by 23.212.9 days.
Accepted by ApJ
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