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Broadband Light Curve Characteristics of Two Prototypical Low-Luminosity Gamma-Ray Bursts
Zhang FW(张富文)1,2,3; Zhang, FW (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
会议录名称AIP Conference Proceedings - 2008 NANJING GAMMA-RAY BURST CONFERENCE
2008
卷号1065
页码47-50
DOI10.1063/1.3027956
产权排序第1完成单位
收录类别CPCI
会议名称Nanjing Gamma-Ray Burst Conference
会议日期2008-06-23
会议地点Nanjing, PEOPLES R CHINA
关键词Gamma-rays Bursts
摘要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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Proceedings Paper
出版者AMER INST PHYSICS
出版地2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA
ISBN号978-0-7354-0596-7
ISSN号0094-243X
URL查看原文
归档日期2008-12-16
WOS记录号WOS:000262709900005
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PULSE-WIDTH; ; LONG-LAG ; ENERGY ; DURATION
引用统计
被引频次:45[WOS]   [WOS记录]     [WOS相关记录]
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7144
专题星系研究组
通讯作者Zhang, FW (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
作者单位1.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
推荐引用方式
GB/T 7714
Zhang FW,Zhang, FW . Broadband Light Curve Characteristics of Two Prototypical Low-Luminosity Gamma-Ray Bursts[C]. 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA:AMER INST PHYSICS,2008:47-50.
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