Radio observations of the first three-months of Fermi AGN at 4.8 GHz
文献类型：期刊论文
| 作者 | Liu, Xiang1 ; Song, Hua-Gang1,2; Liu, Jun1; Ding, Zhen1; Marchili, Nicola3; Krichbaum, Thomas P.3; Fuhrmann, Lars3; Zensus, Anton3; An, Tao4
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2012-02-01 |
| 卷号 | 12期号:2页码:147-157 |
| ISSN号 | 1674-4527 |
| 关键词 | galaxies: active quasars: general radio continuum: galaxies gamma-rays: observations |
| 通讯作者 | liux@xao.ac.cn |
| 英文摘要 | Using the Urumqi 25 m radio telescope, sources from the first three months of the Fermi-large area telescope detected active galactic nuclei (AGN) catalog with a declination of > 0 degrees were observed in 2009 at 4.8 GHz. The radio flux density appeared to correlate with the gamma-ray intensity. Intra-day variability (IDV) observations were performed in March, April and May 2009 for 42 selected gamma-ray bright blazars, and similar to 60% of them showed evidence of flux variability at 4.8 GHz during the IDV observations. The IDV detection rate was higher than that in previous flat-spectrum AGN samples. IDV appeared more often in the very long baseline interferometry-core dominant blazars, and the non-IDV blazars showed relatively "steeper" spectral indices than the IDV blazars. Pronounced inter-month variability was also found in two BL Lac objects: J0112+2244 and J0238+1636. |
| 学科主题 | 星系和宇宙学 |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; ALL-SKY SURVEY ; INTRADAY VARIABILITY ; RAPID VARIABILITY ; CATALOG ; CALIBRATORS ; BRIGHTNESS ; EMISSION ; SPECTRUM |
| 资助信息 | National Natural Science Foundation of China (Grant No. 11073036); National Basic Research Program of China (973 Program; 2009CB824800) |
| 收录类别 | SCI |
| 原文出处 | http://www.raa-journal.org/raa/index.php/raa/index |
| 语种 | 英语 |
| WOS记录号 | WOS:000300762600003 |
| 公开日期 | 2014-12-12 |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/416]  |
| 专题 | 星系宇宙学研究团组 射电天文研究室_利用南山26米射电望远镜观测数据的文章 |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Max Planck Inst Radioastron, D-53121 Bonn, Germany 4.Chinese Acad Sci, Shanghai Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiang,Song, Hua-Gang,Liu, Jun,et al. Radio observations of the first three-months of Fermi AGN at 4.8 GHz[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(2):147-157. |
| APA | Liu, Xiang.,Song, Hua-Gang.,Liu, Jun.,Ding, Zhen.,Marchili, Nicola.,...&An, Tao.(2012).Radio observations of the first three-months of Fermi AGN at 4.8 GHz.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(2),147-157. |
| MLA | Liu, Xiang,et al."Radio observations of the first three-months of Fermi AGN at 4.8 GHz".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.2(2012):147-157. |
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