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Can the bump in the composite spectrum of GRB 910503 be an emission line feature of gamma-ray bursts?
Tan YP(覃一平)1,2; Zhang FW(张富文)1,2,3; Qin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationCHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
2005
Volume5Issue:6Pages:627-635
DOI10.1088/1009-9271/5/6/009
Contribution Rank第1完成单位
Indexed BySCI
KeywordGamma-rays : Bursts Gamma-rays : Theory Radiation Mechanisms : Nonthermal Relativity
AbstractAppearing in the composite spectral data of BATSE, EGRET and COMPTEL for GRB 910503, there is a bump at around 1600 keV. We perform a statistical analysis on the spectral data, trying to find out if the bump could be accounted for by a blue-shifted and significantly broadened rest frame line due to the Doppler effect of an expanding fireball surface. We made an F-test and adopted previously proposed criteria. The study reveals that the criteria are well satisfied and the feature can be interpreted as the blue shifted 6.4 keV line. From the fit with this line taken into account, we find the Lorentz factor of this source to be Gamma =- 116(-9)(+9) (at the 68% confident level, Delta chi(2) = 1) and the rest frame spectral peak energy to be E-0,E-p = 2.96(-0.18)(+0.24) keV. Although the existence of the emission line feature requires other independent tests to confirm, the analysis suggests that it is feasible to detect emission line features in the high energy range of GRB spectra when taking into account the Doppler effect of fireball expansion.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN1009-9271
URL查看原文
Archive Date2005-12-28
WOS IDWOS:000234124400009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordEXTERNAL MATTER ; ABSORPTION ; MODELS ; AFTERGLOW ; MOTION ; IMPACT
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6997
Collection星系研究组
Corresponding AuthorQin, YP (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011
2.Physics Department, Guangxi University, Nanning 530004
3.Graduate University of Chinese Academy of Sciences, Beijing 100049
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Tan YP,Zhang FW,Qin, YP . Can the bump in the composite spectrum of GRB 910503 be an emission line feature of gamma-ray bursts?[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2005,5(6):627-635.
APA Tan YP,Zhang FW,&Qin, YP .(2005).Can the bump in the composite spectrum of GRB 910503 be an emission line feature of gamma-ray bursts?.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,5(6),627-635.
MLA Tan YP,et al."Can the bump in the composite spectrum of GRB 910503 be an emission line feature of gamma-ray bursts?".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 5.6(2005):627-635.
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