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Broadband Light Curve Characteristics of Two Prototypical Low-Luminosity Gamma-Ray Bursts
Zhang FW(张富文)1,2,3
Source PublicationAIP Conference Proceedings - 2008 NANJING GAMMA-RAY BURST CONFERENCE
2008
Volume1065
Pages47-50
DOI10.1063/1.3027956
Author of SourceHuang, YF; Dai, ZG; Zhang, B
Contribution Rank第1完成单位
Indexed ByCPCI
Conference NameNanjing Gamma-Ray Burst Conference
Conference Date2008-06-23
Conference PlaceNanjing, PEOPLES R CHINA
Conference SponsorNatl Nat Sci Fdn China; Nanjing Univ, Dept Astron; Purple Mt Observat; Guangxi Univ, Coll Phys Sci & Technol; Chinese Astron Soc
KeywordGamma-rays Bursts
Abstract

It is recently suggested that low-luminosity gamma-ray bursts (LL-GRBs) are likely a unique GRB population. We present a systematical analysis of the light-curve characteristics from X-ray to gamma-ray bands for two prototypical LL-GRBs, 980425 and 060218. It is found that both the pulse width (w) and the ratio of the rising width to the decaying width (r/d) of the two bursts are energy-dependent over a broad energy band. There exists a significant trend that the pulses tend to be narrower and more symmetrical at higher energy bands for the two events. Both the X-rays and gamma-rays follow the same w-E and r/d-E relations. These facts may indicate that the X-ray emission tracks the gamma-ray emission, and both are likely to originate from the same physical mechanism. Their light curves show significant spectral lags. We calculate the three types of lags with the pulse peaking time (t(peak)), the pulse centroid time (t(cen)), and the cross-correlation function (CCF). The lag calculated by CCF is strongly correlated with that derived from t(peak), but the lag derived from t(cen) is less correlated with that derived from tpeak and CCF. We also find that their pulse temporal characteristics are normal when compared to the other normal BATSE GRB pulses, indicating that GRBs 980425 and 060218 may share a similar radiation physics with them.

Funding OrganizationN/A
Language英语
Subject Area天文学 ; 天体物理学 ; 星系与宇宙学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
PublisherAMER INST PHYSICS
Publication Place2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
ISBN978-0-7354-0596-7
ISSN0094-243X
URL查看原文
Archive Date2008-12-16
WOS IDWOS:000263064500010
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordPulse-width ; Long-lag ; Energy ; Duration
Citation statistics
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/7144
Collection星系研究组
Corresponding AuthorZhang FW(张富文)
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650011, China
2.Department of Mathematics and Physics, Guilin University of Technology, Guilin, Guangxi 541004, China
3.The Graduate School of the Chinese Academy of Sciences, P.O. Box 3908, Beijing 100039, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang FW. Broadband Light Curve Characteristics of Two Prototypical Low-Luminosity Gamma-Ray Bursts[C]//Huang, YF; Dai, ZG; Zhang, B. 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA:AMER INST PHYSICS,2008:47-50.
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