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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.
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
2008-08
Volume8Issue:4Pages:451-464
DOI10.1088/1009-9271/8/4/09
Contribution Rank第1完成单位
Indexed BySCI
KeywordGamma-rays : Bursts Gamma-rays : Observations Methods : Statistical
AbstractWe 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.
Funding OrganizationNational Natural Science Foundation of China(10533050, 10573030)
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1009-9271
URL查看原文
WOS IDWOS:000258698200009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSPECTRAL EVOLUTION ; LIGHT CURVES ; PULSES ; FIREBALLS ; EMISSION ; AFTERGLOWS ; FEATURES ; PLASMA
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7036
Collection星系研究组
Corresponding AuthorJia, LW (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/ Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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