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arXiv astro-ph/0411368astro-phgr-qchep-ex
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伽马射线暴脉冲不同通道光变曲线的关系

Relationship between different channel light curves of gamma-ray burst pulses shown in aspects other than the pulse width

Yi-Ping Qin

摘要:

本文利用光变曲线的峰值计数率{ \bf \} $C_p$和总计数$C_{total}$,从相应的方面研究了不同通道光变曲线之间的关系。为了直接比较不同通道光变曲线的计数率,我们引入了$C(τ)$与$C_H(τ)$的关系图,其中$C(τ)$是通道的计数率,$C_H(τ)$是确定通道H的计数率(见正文)。根据该图,我们将$ΔC_{\max}$定义为与$% C_H(τ)$的相同计数率值相关联的$C(τ)$的两个计数率值的最大偏差,并将$ΔS$定义为图中由$C(τ)$的闭合曲线限定的面积,以测量光曲线的上升和衰减部分相对于通道H的计数率的差异。在假设所观测到的伽玛暴处于相对论膨胀的火球阶段的情况下,对四个量{ \bf(} $C_p$、$C_{total}$、$ΔC_{\max}$和$ΔS$)和宽频带内的能量,用不同的静止坐标系辐射形式和两个典型的洛伦兹因子计算($Γ=20$和200),这将使我们的模型与即将到来的Swift数据的测试更容易。对火球机制中的关系也作了解释。

英文摘要:

In this paper, we employ the peak count rate{\bf \}$C_p$ and the total count $C_{total}$ of light curves to study in the corresponding aspects the relationship between different channel light curves. To make a direct comparison between count rates of different channel light curves we introduce a plot of $C(τ)$ versus $C_H(τ)$, where $C(τ)$ is the count rate of a channel and $C_H(τ)$ is the count rate of a definite cannel, channel H (see the text). According to the plot we define $ΔC_{\max}$ as the maximum deviation of the two count rate values of $C(τ)$ associated with a same count rate value of $% C_H(τ)$ and define $ΔS$ as the area confined by the close curve of $C(τ)$ in the plot to measure the difference of the rising and decaying portions of a light curve relative to the count rate of channel H. Under the assumption that some GRBs observed are in the stage of fireballs which expand relativistically, predictions on the relationships between the four quantities{\bf (}$C_p$, $C_{total}$, $ΔC_{\max}$, and $ΔS$) and energy within a wide band, calculated with different rest frame radiation forms and two typical Lorentz factors ($Γ=20$ and 200), are made and presented, which would make the test of our model with the coming Swift data easier. Interpretations to the relationships within the mechanism of fireballs are also presented.

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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