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, Xiang 1; Song, Hua-Gang 1,2; Liu, Jun1 ; Ding, Zhen 1; Marchili, Nicola 3; Krichbaum, Thomas P.3; Fuhrmann, Lars 3; Zensus, Anton 3; An, Tao4
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2012-02-01
卷号	12 期号:2 页码:147-157
关键词	galaxies: active quasars: general radio continuum: galaxies gamma-rays: observations
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.
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000300762600003
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/18154]
专题	上海天文台_天文技术研究室
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.