GAMMA-RAY BURST PEAK DURATION AS A FUNCTION OF ENERGY

被引：0

作者：

FENIMORE, EE ^{[1
]}

INTZAND, JJM ^{[1
]}

NORRIS, JP ^{[1
]}

BONNELL, JT ^{[1
]}

NEMIROFF, RJ ^{[1
]}

机构：

[1] NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 1995年 / 448卷 / 02期

关键词：

GAMMA RAYS; BURSTS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Gamma-ray burst time histories often consist of many peaks. These peaks tend to be narrower at higher energy. If gamma-ray bursts are cosmological, the energy dependence of gamma-ray burst timescales must be understood in order to correct the timescale dependence due to the expansion of the universe. By using the average autocorrelation function and the average pulse width, we show that the narrowing with energy follows, quite well, a power law. The power-law index is similar to-0.4. This is the first quantitative relationship between temporal and spectral structure in gamma-ray bursts. It is unclear what physics causes this relationship. The average autocorrelation has a universal shape such that one energy range scales linearly with time into all other energy ranges. This shape is approximately the sum of two exponentials.

引用

页码：L101 / L104

页数：4

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