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The correlations between hardness ratios and fitting parameters in GRB spectrum
Liang EW(梁恩维)1,2,3; Xie GZ(谢光中)1,2,4; Rong, XG5; Liang, EW (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China.
Source PublicationASTROPHYSICS AND SPACE SCIENCE
2002
Volume280Issue:4Pages:357-368
DOI10.1023/A:1015622324180
Contribution Rank第1完成单位
Indexed BySCI
AbstractIn this paper, besides general definition of hardness ratio of gamma-ray bursts (GRBs), HR32, we also presented new definitions of hardness ratios, HRhl and HRll, then presented the results of correlation studies, examining the association between the hardness ratios and the spectral fitting parameters (E-0 or E-peak, alpha, beta) by using the GRB data observed by BATSE. The HRhl is defined as the fluence of channel 4 divided by the sum of the fluences of channels 1 to 3, and the HRll is defined as the fluence of channel 3 divided by the sum of the fluences of channel 1 and 2. We found that E-0 and E-peak are correlated with hardness ratios, and beta is only correlated with log (HRhl). The alpha is not correlated with any hardness ratios in the total sample of GRBs, while it correlated with log (HRll) and log (HR32) in the two subsets seperated at log (HRll) = 0.34 x alpha +0.66, respectively. These results show that a harder spectra tends to be steeper and has a higher E-peak or E-0; HRhl describes the spectral behaviors in high energy, while both of HRll and HR32 reflect the spectral characteristics in low energy; the spectral behaviors in low energy are different for the two subsets. We also presented a brief qualitative analysis discussion to the correlations and suggested that the correlations are caused by both of intrinsic and cosmological effects, but intrinsic effects are dominant.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-640X
URL查看原文
Archive Date2002-08-13
WOS IDWOS:000175807100005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordGAMMA-RAY BURSTS ; BATSE OBSERVATIONS ; PEAK
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6954
Collection星系研究组
Corresponding AuthorLiang, EW (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Yunnan, Peoples R China.
Affiliation1.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan, 650011, P. R. China
2.National Astronomical Observatories, Chinese Academy of Sciences, P. R. China
3.Physics Department, Guangxi University, Nanning, Guangxi, 530004, P. R. China
4.Yunnan Astrophysics Center, Yunnan University, Kunming, Yunnan 650091, P. R. China
5.Department of Physics, Guangxi Normal University, Guilin, Guangxi, 541004, P. R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liang EW,Xie GZ,Rong, XG,et al. The correlations between hardness ratios and fitting parameters in GRB spectrum[J]. ASTROPHYSICS AND SPACE SCIENCE,2002,280(4):357-368.
APA Liang EW,Xie GZ,Rong, XG,&Liang, EW .(2002).The correlations between hardness ratios and fitting parameters in GRB spectrum.ASTROPHYSICS AND SPACE SCIENCE,280(4),357-368.
MLA Liang EW,et al."The correlations between hardness ratios and fitting parameters in GRB spectrum".ASTROPHYSICS AND SPACE SCIENCE 280.4(2002):357-368.
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