Institutional Repository of Radio Astronomy Research Laboratory
| The long-term and intraday variabilities of the BL Lac object OJ287 at 5 GHz | |
Cui, Lang1,2 ; Song, HuaGang1; Liu, Xiang1
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| 2009 | |
| Conference Name | APRIM 2008: 10th Asian-Pacific Regional IAU Meeting |
| Source Publication | APRIM 2008: Proceedings of the 10th Asian-Pacific Regional IAU Meeting |
| Pages | 212-213 |
| Conference Date | August 3-6, 2008 |
| Conference Place | Kunming, Yunnan, China |
| Country | China |
| Author of Source | Shuang Nan Zhang ; Yan Li ; Qing Juan Yu |
| Publisher | National Observatories of China Press |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | AGN: OJ287 AGN: variability long-term IDV |
| URL | 查看原文 |
| Indexed By | 其他 |
| Language | 英语 |
| Document Type | 会议论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4164 |
| Collection | 射电天文研究室_星系宇宙学研究团组 |
| Affiliation | 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 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation 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]//Shuang Nan Zhang, Yan Li, Qing Juan Yu:National Observatories of China Press,2009:212-213. |
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| File Name/Size | DocType | Version | Access | License | ||
| Cui-2008-The long-te（400KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Application Full Text | ||
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