Correlations between various hardness ratios of gamma-ray bursts

	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, XT 6
刊名	ASTRONOMY & ASTROPHYSICS
	2001-04
卷号	369 期号:2 页码:537-543
关键词	gamma rays : bursts methods : statistical
ISSN号	0004-6361
通讯作者	Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	BATSE OBSERVATIONS ; AFTERGLOW ; SPECTRA ; BRIGHT
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2001/14/aa9680/aa9680.html
语种	英语
WOS记录号	WOS:000168342600020
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6939]
专题	云南天文台_星系研究组
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
推荐引用方式 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.(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.