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Distributions of the hardness ratio of short and long gamma-ray bursts in different time intervals within the first two seconds
Dong YM(董云明)1,2; Tan YP(覃一平)1,3; Dong, YM (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2005-04-21
Volume358Issue:4Pages:1267-1272
DOI10.1111/j.1365-2966.2005.08746.x
Contribution Rank第1完成单位
Indexed BySCI
KeywordMethods : Statistical Gamma-rays : Bursts
AbstractIn the present paper, we investigate the distribution of the hardness ratio (HR) for short and long gamma-ray bursts (GRBs) in different time-scales for the first two seconds. After including and subtracting the background count, we performed a Kolmogorov-Smirnov (K-S) test on the HR distributions of the two classes of GRBs in each time interval. Our analysis shows that the probabilities of the K-S test to the distributions are very small, suggesting that the two classes of bursts are unlikely to arise from the same HR distributions. The result indicates that the two kinds of bursts probably originate from different mechanisms or have different central engines. In addition, we found that the HR of short bursts within the time interval 0-0.96 s changes from hard to soft; the HR of long bursts does not. The two kinds of bursts have different characteristics in the first two seconds, which might be associated with different physical mechanisms.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0035-8711
URL查看原文
Archive Date2005-05-09
WOS IDWOS:000228179000010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6992
Collection星系研究组
Corresponding AuthorDong, YM (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, PO Box 110, Kunming 650011, China
2.Graduate School of The Chinese Academy of Sciences, Beijing 100039, China
3.Physics Department, Guangxi University, Nanning, Guangxi 530004, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Dong YM,Tan YP,Dong, YM . Distributions of the hardness ratio of short and long gamma-ray bursts in different time intervals within the first two seconds[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,358(4):1267-1272.
APA Dong YM,Tan YP,&Dong, YM .(2005).Distributions of the hardness ratio of short and long gamma-ray bursts in different time intervals within the first two seconds.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,358(4),1267-1272.
MLA Dong YM,et al."Distributions of the hardness ratio of short and long gamma-ray bursts in different time intervals within the first two seconds".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 358.4(2005):1267-1272.
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