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An analysis of the durations of Swift gamma-ray bursts
Zhang ZB(张志彬)1,2; Choi, CS1; Zhang, ZB (reprint author), Korea Astron & Space Sci Inst, Int Ctr Astrophys, 36-1 Hwaam, Taejon 305348, South Korea.
Source PublicationASTRONOMY & ASTROPHYSICS
2008-06
Volume484Issue:2Pages:293-297
DOI10.1051/0004-6361:20079210
Contribution Rank第2完成单位
Indexed BySCI ; EI
KeywordGamma Rays : Bursts Gamma Rays : Theory
AbstractContext. Swift detectors are found to be more sensitive to long-soft bursts than pre-Swift missions. This may largely bias the distribution of durations and thus classification of gamma-ray bursts. Aims. We systematically investigate the duration distribution of gamma-ray bursts in the Swift era vs. that of pre-Swift bursts. Methods. For the purpose of this study, statistical methods such as the K-S test and linear/non-linear fitting analysis have been used to examine the duration properties of Swift bursts in both observer and source frames. Results. For 95 GRBs with known redshift, we show that two log-normal distributions of duration are clearly divided at T(90) similar or equal to 2 s. The intrinsic durations also show a bimodal distribution but shift systematically toward the smaller value and the distribution exhibits a narrower width than the observed one. Swift long bursts exhibit a wider duration dynamic range in both observer and source frames in comparison to pre-Swift long bursts. Conclusions. We find that Swift bursts and pre-Swift ones can share the same criterion of classification in terms of duration at 2 s, although both monitors have large differences with respect to sensitivity of a given energy band.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-6361
URL查看原文
WOS IDWOS:000256309700001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSPECTRAL LAGS ; BRIGHTNESS DISTRIBUTION ; REDSHIFT DISTRIBUTION ; BIMODAL DISTRIBUTION ; MILLISECOND PULSARS ; PEAK ENERGY ; LONG ; EMISSION ; CATALOG ; ORIGIN
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Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7039
Collection星系研究组
Corresponding AuthorZhang, ZB (reprint author), Korea Astron & Space Sci Inst, Int Ctr Astrophys, 36-1 Hwaam, Taejon 305348, South Korea.
Affiliation1.International Center for Astrophysics, Korea Astronomy and Space Science Institute, 36-1 Hwaam, Yusong, Daejon 305-348, South Korea
2.Yunnan Observatory, National Astronomical Observatories, Chinese Academy of Sciences, PO Box 110, Kunming 650011, PR China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang ZB,Choi, CS,Zhang, ZB . An analysis of the durations of Swift gamma-ray bursts[J]. ASTRONOMY & ASTROPHYSICS,2008,484(2):293-297.
APA Zhang ZB,Choi, CS,&Zhang, ZB .(2008).An analysis of the durations of Swift gamma-ray bursts.ASTRONOMY & ASTROPHYSICS,484(2),293-297.
MLA Zhang ZB,et al."An analysis of the durations of Swift gamma-ray bursts".ASTRONOMY & ASTROPHYSICS 484.2(2008):293-297.
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