Distribution of spectral lags in gamma-ray bursts

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	Distribution of spectral lags in gamma-ray bursts
	Chen, L; Lou, YQ; Wu M(吴枚); Qu JL(屈进禄); Wu, M; Qu, JL; Jia, SM; Yang, XJ
刊名	ASTROPHYSICAL JOURNAL
	2005
卷号	619 期号:2 页码:983-993
关键词	gamma rays : bursts gamma rays : observations methods : data analysis plasmas radiation mechanisms : general shock waves
通讯作者	Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China ; Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China ; Tsinghua Univ, THCA, Beijing 100084, Peoples R China ; Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA ; Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Particle Astrophys Lab, Beijing 100039, Peoples R China
英文摘要	Using the data acquired in the time-to-spill (TTS) mode for long gamma-ray bursts (GRBs) by the Burst and Transient Source Experiment (BATSE) on board the Compton Gamma Ray Observatory (CGRO), we have carefully measured spectral lags in time between the low (25-55 keV) and high (110-320 keV) energy bands of individual pulses contained in 64 multipeak GRBs. We find that a temporal lead by higher energy gamma-ray photons (i.e., positive lags) is the norm in this selected sample set of long GRBs. While relatively few in number, some pulses of several long GRBs do show negative lags. This distribution of spectral lags in long GRBs is in contrast to that in short GRBs. This apparent difference poses challenges to and places constraints on the physical mechanism(s) for producing long and short GRBs. The relation between the pulse peak count rates and the spectral lags is also examined. Observationally, there seems to be no clear evidence for a systematic spectral lag-luminosity connection for pulses within a given long GRB.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000226589100027
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238835]
专题	高能物理研究所_粒子天体物理中心高能物理研究所_理论物理室高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Chen, L,Lou, YQ,Wu M,et al. Distribution of spectral lags in gamma-ray bursts[J]. ASTROPHYSICAL JOURNAL,2005,619(2):983-993.
APA	Chen, L.,Lou, YQ.,吴枚.,屈进禄.,Wu, M.,...&Yang, XJ.(2005).Distribution of spectral lags in gamma-ray bursts.ASTROPHYSICAL JOURNAL,619(2),983-993.
MLA	Chen, L,et al."Distribution of spectral lags in gamma-ray bursts".ASTROPHYSICAL JOURNAL 619.2(2005):983-993.