Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A

CORC > 云南天文台 > 中国科学院云南天文台 > 中国科学院天体结构与演化重点实验室

	Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A
	Li, Biao 1; Li, Zhuo 1,2
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2012-11
卷号	12 期号:11 页码:1519-1525
关键词	gamma-rays: bursts acceleration of particles
ISSN号	1674-4527
通讯作者	Li, BA (reprint author), Peking Univ, Kavli Inst Astron & Astrophys, Dept Astron, Beijing 100871, Peoples R China.
英文摘要	It is expected that there should be a spectral cutoff at the high energy end of emission from a prompt gamma-ray burst (GRB), due to, e.g. gamma gamma absorption and/or a high energy cutoff in the electron distribution. We analyze the spectral data of Fermi-LAT detected GRBs 080916C and 090926A, aiming at locating the spectral cutoff. By assuming that the prompt GRB spectrum at the high energy end is a power law with an exponential cutoff, our analysis finds that the cutoff energy E-cutoff depends on the photon index beta and the cutoff occurs at very high energy, E-cutoff = 161(-95)(+533) GeV in GRB 080916C and E-cutoff greater than or similar to 100 GeV (for beta approximate to -2.3) in GRB 090926A. Such high energy photons, if they exist, may disfavor the synchrotron origin and need alternative generation mechanisms.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	GAMMA-RAY BURSTS ; LORENTZ FACTORS ; GEV EMISSION ; RESIDUAL COLLISIONS ; PROMPT ; RADIATION ; AFTERGLOW ; OUTFLOWS ; LIMITS ; BATSE
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/1674-4527/12/11/006/meta
语种	英语
WOS记录号	WOS:000311523700006
公开日期	2016-06-01
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9428]
专题	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.Department of Astronomy/Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Li, Biao,Li, Zhuo. Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(11):1519-1525.
APA	Li, Biao,&Li, Zhuo.(2012).Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(11),1519-1525.
MLA	Li, Biao,et al."Spectral cutoffs of Fermi-LAT GRBs 080916C and 090926A".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.11(2012):1519-1525.