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Relation between the hardness ratio and time in the first two seconds for compatible samples of short and long gamma-ray bursts
Tan YP(覃一平)1,3; Dong YM(董云明)1,2; Qin, YP (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:1320-1324
DOI10.1111/j.1365-2966.2005.08794.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 this paper, we randomly selected a sample ( sample 1) of long gamma-ray bursts, with its size being the same as that of the short-burst group ( sample 2) ( N = 500), from the Current BATSE Bursts Catalog. We randomly selected a short burst and assigned its T-90 to each of these long bursts. We thus constructed a long-burst sample with both the sample size and the distribution of T-90 being the same as those of the short-burst sample obtained from the Current BATSE Bursts Catalog. Then we calculated the hardness ratio (hr(t)) over the assigned T-90 for the long bursts and over their own T90 for the short bursts, and studied the relation between the hardness ratio and the corresponding T90 for these two samples. We also calculated the hardness ratio ( hrt) over the randomly selected 64-ms time intervals within the T-90, and investigated the relation between this hardness ratio and the selected 64-ms time interval. In addition, the hr(T) within and beyond the first two seconds for all the long bursts ( sample 3; N = 1541) were also investigated. We found that the Kolmogorov - Smirnov (KS) probabilities of the distributions of hr(T) (7.15337E- 15) and hr(t) (9.54833E- 10) for samples 1 and 2 are very small, and the average values of hrT and hrt for short bursts are obviously larger than those of the long bursts. The correlations between log hr(T) and log T-90, and between log hrt and log t, are different for samples 1 and 2. These show that short and long bursts in the first two seconds have different characters and they probably originate from different progenitors. For sample 3, for the two time intervals, the KS probability is 5.35828E-5, which suggests that the hardness ratios in different time intervals for long bursts are also different.
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:000228179000015
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]35462
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被引频次:2[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/114a53/6993
专题星系研究组
通讯作者Qin, YP (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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Tan YP,Dong YM,Qin, YP . Relation between the hardness ratio and time in the first two seconds for compatible samples of short and long gamma-ray bursts[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2005,358(4):1320-1324.
APA Tan YP,Dong YM,&Qin, YP .(2005).Relation between the hardness ratio and time in the first two seconds for compatible samples of short and long gamma-ray bursts.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,358(4),1320-1324.
MLA Tan YP,et al."Relation between the hardness ratio and time in the first two seconds for compatible samples of short and long gamma-ray bursts".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 358.4(2005):1320-1324.
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