The long-term and intraday variabilities of the BL Lac object OJ287 at 5 GHz
文献类型：会议论文
| 作者 | Cui, Lang1,2 ; Song, HuaGang1; Liu, Xiang1
|
| 出版日期 | 2009 |
| 会议日期 | August 3-6, 2008 |
| 会议地点 | Kunming, Yunnan, China |
| 关键词 | AGN: OJ287 AGN: variability long-term IDV |
| 页码 | 212-213 |
| 国家 | China |
| 英文摘要 | In this paper, we use the databases of the university of Michigan Radio Astronomy Observatory (UMRAO) and the Very Large Array (VLA) at 5.0 GHz to analyze the radio light curve of BL Lac object OJ287 by both the power spectrum method and the structure function method. By analyzing several decades data, we find a new quasi-periodicity of 2.3 ± 0.1 yr in its light curves.We also carried out IntraDay Variability (IDV) observations at 5.0 GHz with the Urumqi 25m radio telescope from late 2006, to study the IDV properties of OJ287. We detected an IDV of 1.9 ± 0.6% on average in the source.We discussed the 2.3 yr quasi-periodic variability and the IDV of OJ287, which are both likely caused by intrinsic activities of the source. |
| 源文献作者 | Shuang Nan Zhang ; Yan Li ; Qing Juan Yu |
| 产权排序 | 1 |
| 会议录 | APRIM 2008: Proceedings of the 10th Asian-Pacific Regional IAU Meeting
 |
| 会议录出版者 | National Observatories of China Press |
| 语种 | 英语 |
| URL标识 | 查看原文 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4164]  |
| 专题 | 星系宇宙学研究团组 |
| 作者单位 | 1.Urumqi Observatory, National Astronomical Observatories, CAS, 40-5 South Beijing Road, Urumqi 830011, China; 2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China |
| 推荐引用方式 GB/T 7714 | Cui, Lang,Song, HuaGang,Liu, Xiang. The long-term and intraday variabilities of the BL Lac object OJ287 at 5 GHz[C]. 见:. Kunming, Yunnan, China. August 3-6, 2008. |
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来源：新疆天文台
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