Radio observations of the first three-months of Fermi AGN at 4.8 GHz

	Radio observations of the first three-months of Fermi AGN at 4.8 GHz
	Liu, Xiang1 ; Song, Hua-Gang1,2 ; Liu, Jun1 ; Ding, Zhen1 ; Marchili, Nicola 3; Krichbaum, Thomas P.3; Fuhrmann, Lars 3; Zensus, Anton 3; An, Tao 4
	2012-02-01
Source Publication	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN	1674-4527
Volume	12 Issue:2 Pages:147-157
Contribution Rank	1
Abstract	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.
Keyword	Galaxies: Active Quasars: General Radio Continuum: Galaxies Gamma-rays: Observations
Subtype	Article
Subject Area	星系和宇宙学
WOS Headings	Science & Technology ; Physical Sciences
URL	查看原文
Indexed By	SCI
Language	英语
WOS Keyword	Active Galactic Nuclei ; Large-area Telescope ; All-sky Survey ; Intraday Variability ; Rapid Variability ; Catalog ; Calibrators ; Brightness ; Emission ; Spectrum
Funding Project	星系宇宙学研究团组
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000300762600003
Funding Organization	National Natural Science Foundation of China (Grant No. 11073036) ; National Basic Research Program of China (973 Program ; 2009CB824800)
Citation statistics	Cited Times:7[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/416
Collection	射电天文研究室_星系宇宙学研究团组科研仪器设备产出_利用南山26米射电望远镜（NSRT）观测数据的文章
Corresponding Author	Liu, Xiang
Affiliation	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
First Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author Affilication	Xinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation 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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