A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect

doi:10.1088/1009-9271/8/4/09

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	A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect
	Jia LW(贾兰伟)1,2 ; Jia, LW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊	CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
	2008-08
卷号	8 期号:4 页码:451-464
DOI	10.1088/1009-9271/8/4/09
产权排序	第1完成单位
收录类别	SCI
关键词	Gamma-rays : Bursts Gamma-rays : Observations Methods : Statistical
摘要	We analyzed a sample of 66 gamma-ray bursts (GRBs) and statistically confirmed the prediction on the time curve of the hardness ratio of GRBs made by Qin et al. based on the curvature effect. In their analysis, GRB pulses are divided into three types according to the shape of their raw hardness ratio (RHR) time curves, defined as to include the background counts to the signal counts, so as to make use of counts within small time intervals. Of the three types, very hard sources exhibit a perfect pulse-like profile (type I), hard bursts possess a pulse-like profile with a dip in the decay phase (type 2), and soft bursts show no pulse-like profile but have only a dipped profile (type 3). In terms of the conventional hardness ratio, type 3 sources are indeed generally softer than those of type I and type 2, in agreement with the prediction. We found that the minimum value of RHR is sensitive in distinguishing the different types. We propose that GRB pulses can be classified according to the minimum value of RHR and that the different type sources may be connected with different strengths of the shock or/and the magnetic field.
项目资助者	National Natural Science Foundation of China(10533050, 10573030)
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	1009-9271
URL	查看原文
WOS记录号	WOS:000258698200009
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	SPECTRAL EVOLUTION ; LIGHT CURVES ; PULSES ; FIREBALLS ; EMISSION ; AFTERGLOWS ; FEATURES ; PLASMA
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/7036
专题	星系研究组
通讯作者	Jia, LW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位	1.National Astronomical Observatories/ Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China 2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Jia LW,Jia, LW . A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(4):451-464.
APA	Jia LW,&Jia, LW .(2008).A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,8(4),451-464.
MLA	Jia LW,et al."A test on different types of the time curve of hardness ratio of gamma-ray bursts based on the curvature effect".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 8.4(2008):451-464.

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