射电天文研究室知识库

Variability is one of the extreme observational properties of BL Lacertae objects. AO 0235+164 is a well-studied BL Lac throughout. all. electromagnetic wavebands. In the present work, we show its optical R-band photometric observations carried out during the period from. 2006 November. to 2012 December using the Ap6E CCD camera attached to the primary focus of the 70 cm meniscus telescope at Abastumani Observatory, Georgia. During our monitoring period, it showed. a large variation of Delta R = 4.88 mag (14.19-19.07 mag) and a short timescale of Delta T-v = 73.5 minutes. During the period of 2006 December to 2009 November, we made radio observations of the source using the 25 m radio telescope at Xinjiang Astronomical Observatory. By adopting a. discrete correlation function. to. the optical and radio observations. we found that the optical variation leads a. radio variation of. 23.2 +/- 12.9 days.