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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.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2005-04-21
卷号358期号:4页码:1267-1272
DOI10.1111/j.1365-2966.2005.08746.x
产权排序第1完成单位
收录类别SCI
关键词Methods : Statistical Gamma-rays : Bursts
摘要In 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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
URL查看原文
归档日期2005-05-09
WOS记录号WOS:000228179000010
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6992
专题星系研究组
通讯作者Dong, YM (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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
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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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