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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, Nicola3; Krichbaum, Thomas P.3; Fuhrmann, Lars3; Zensus, Anton3; An, Tao4
2012-02-01
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume12Issue:2Pages:147-157
Contribution Rank1
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.

KeywordGalaxies: Active Quasars: General Radio Continuum: Galaxies Gamma-rays: Observations
SubtypeArticle
Subject Area星系和宇宙学
WOS HeadingsScience & Technology ; Physical Sciences
URL查看原文
Indexed BySCI
Language英语
WOS KeywordActive 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 AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000300762600003
Funding OrganizationNational Natural Science Foundation of China (Grant No. 11073036) ; National Basic Research Program of China (973 Program ; 2009CB824800)
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://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
射电天文研究室
天文科普教育中心
工程项目处
Corresponding AuthorLiu, Xiang
Affiliation1.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 AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang 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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