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arXiv 0806.1279astro-ph
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GRB 060124中脉冲宽度与能量的关系:从X射线到gamma-ray带

Relationship between pulse width and energy in GRB 060124: from X-ray to gamma-ray bands

Fu-Wen Zhang, Yi-Ping Qin

摘要:

GRB 060124是第一个同时被三台\emph{Swift}观测到瞬发和余辉辐射的事件。它的主峰也触发了Konus-Wind和HETE-II。因此,对瞬发辐射的时间和光谱特性的研究可以扩展到X射线波段。我们进行了详细的分析,这两个很好地确定脉冲的爆发,并发现脉冲在更高的能量更窄,X射线和γ射线遵循相同的$w - E$关系的个人脉冲。然而,脉冲之间的$w - E$关系并没有一个普适的幂律指数。我们还发现,上升衰变比$r/d$似乎不随$E$的变化而变化,并且$r/d$值与在典型伽玛暴中观测到的值很好地一致。宽带光谱能量分布也表明X射线与伽马射线的光谱行为一致。这些结果表明,X射线发射跟踪γ射线发射,并且两个能带的发射可能源自相同的物理机制。

英文摘要:

GRB 060124 is the first event that both prompt and afterglow emission were observed simultaneously by the three \emph{Swift} instruments. Its main peak also triggered Konus-Wind and HETE-II. Therefore, investigation on both the temporal and spectral properties of the prompt emission can be extended to X-ray bands. We perform a detailed analysis on the two well identified pulses of this burst, and find that the pulses are narrower at higher energies, and both X-rays and gamma-rays follow the same $w - E$ relation for an individual pulse. However, there is no a universal power-law index of the $w - E$ relation among pulses. We find also that the rise-to-decay ratio $r/d$ seems not to evolve with $E$ and the $r/d$ values are well consistent with that observed in typical GRBs. The broadband spectral energy distribution also suggest that the X-rays are consistent with the spectral behavior of the gamma-rays. These results indicates that the X-ray emission tracks the gamma-ray emission and the emissions in the two energy bands are likely to be originated from the same physical mechanism.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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