Rapid high-amplitude gamma-ray variability in blazar PKS 0507+17

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	Rapid high-amplitude gamma-ray variability in blazar PKS 0507+17
	Liao NH(廖能惠)1,2,3 ; Bai JM(白金明)1,2
刊名	NEW ASTRONOMY
	2015-01
卷号	34 页码:134-138
关键词	Galaxies: active Galaxies: jets Gamma rays: galaxies Quasars: individual: (PKS 0507+17)
ISSN号	1384-1076
通讯作者	Liao, NH (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	We report a detailed analysis of gamma-ray data of 2FGL J0509.9+1802 observed by the Large Area Telescope on board Fermi satellite, especially focusing on April 2013 when extraordinary gamma-ray variability has been detected. Localization of gamma-ray emission during this epoch suggests that the gamma-ray source only associates with PKS 0507+17. The gamma-ray emission of PKS 0507+17 is identified at the first time. The daily peak flux is over two orders of magnitude higher than the first two-year average flux, giving an isotropic gamma-ray luminosity of similar or equal to 4 x 10(48) erg s(-1). Rapid gamma-ray variability with doubling time of 2-3 h has been detected. Such a short doubling timescale has been detected for only a few bright blazars and indicates a location of gamma-ray emission inside the broad line region. Together with the bluer-when-brighter gamma-ray spectra, the variability phenomena could be well explained by the classic flat-spectrum radio quasar variability model that includes a fast injection of accelerated electrons and the external Compton cooling process. (C) 2014 Elsevier B.V. All rights reserved.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LARGE-AREA TELESCOPE ; ACTIVE GALACTIC NUCLEI ; ALL-SKY SURVEY ; RADIO-SOURCES ; BL LACERTAE ; 3C 279 ; EMISSION ; REGION ; FLARE ; CATALOG
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1384107614000918
语种	英语
WOS记录号	WOS:000342530900017
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5474]
专题	云南天文台_丽江天文观测站（南方基地）云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.a Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, China 3.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式 GB/T 7714	Liao NH,Bai JM. Rapid high-amplitude gamma-ray variability in blazar PKS 0507+17[J]. NEW ASTRONOMY,2015,34:134-138.
APA	Liao NH,&Bai JM.(2015).Rapid high-amplitude gamma-ray variability in blazar PKS 0507+17.NEW ASTRONOMY,34,134-138.
MLA	Liao NH,et al."Rapid high-amplitude gamma-ray variability in blazar PKS 0507+17".NEW ASTRONOMY 34(2015):134-138.