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Correlations between various hardness ratios of gamma-ray bursts
Tan YP(覃一平)1,2,3,4; Xie GZ(谢光中)1,2,4; Liang EW(梁恩维)1,2,5; Zheng, XT6; Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2001-04
卷号369期号:2页码:537-543
DOI10.1051/0004-6361:20010149
产权排序第1完成单位
收录类别SCI ; EI
关键词Gamma Rays : Bursts Methods : Statistical
摘要We study correlations between various hardness ratios of gamma-ray bursts (GRBs) and investigate if there are any differences between the short- and long-duration classes of the objects in the distributions of the ratios. The results show that most of the hardness ratios are mutually correlated, but that the ratio defined at the lower energy bands is not correlated with those defined at the higher energy bands, the most significant correlations come from those ratios defined with both the lower and higher energy bands. It a also shown that the short-duration bursts tend to have higher values of hardness ratios. We reach these conclusions that the slope of the higher part of the spectrum of most GRBs is independent of that of the lower part; emissions at higher energy bands from the bursts of both short- and long-duration classes are significantly different for different sources, but radiations at lower energy bands are similar; the spectra of the short-duration bursts is harder than that of the long-duration bursts. A possible interpretation for these results involves Doppler boosting in the relativistic beaming model. In addition, the study reveals that hardness ratios of the long-duration class are more mutually correlated than these of the short-duration class; the data of hardness ratios for the long-duration class are much less scattered than those of the short-duration class. It is found that this difference is at least partially due to measurement errors.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
归档日期2001-11-05
WOS记录号WOS:000168342600020
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]BATSE OBSERVATIONS ; AFTERGLOW ; SPECTRA ; BRIGHT
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被引频次:10[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/114a53/6939
专题星系研究组
通讯作者Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China.
作者单位1.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, PR China
2.National Astronomical Observatories, Chinese Academy of Sciences
3.Chinese Academy of Science-Peking University joint Beijing Astrophysical Center
4.Yunnan Astrophysics Center
5.Physics Department, Guangxi University, Nanning, Guangxi 530004, PR China
6.Department of Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210014, PR China
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GB/T 7714
Tan YP,Xie GZ,Liang EW,et al. Correlations between various hardness ratios of gamma-ray bursts[J]. ASTRONOMY & ASTROPHYSICS,2001,369(2):537-543.
APA Tan YP,Xie GZ,Liang EW,Zheng, XT,&Qin, YP .(2001).Correlations between various hardness ratios of gamma-ray bursts.ASTRONOMY & ASTROPHYSICS,369(2),537-543.
MLA Tan YP,et al."Correlations between various hardness ratios of gamma-ray bursts".ASTRONOMY & ASTROPHYSICS 369.2(2001):537-543.
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