Off-Axis Emission from the Beamed Afterglow of Gamma-Ray Bursts and a Possible Interpretation of the Slowly Declining X-Ray Afterglow of GRB 980425
Off-Axis Emission from the Beamed Afterglow of Gamma-Ray Bursts and a Possible Interpretation of the Slowly Declining X-Ray Afterglow of GRB 980425
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DOI：
10.1086/312235
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发表时间：
1999-07
期刊：
影响因子：
--
通讯作者：
Takashi Nakamura
中科院分区：
文献类型：
--
作者：
Takashi Nakamura
本文导出了同步辐射模型中γ暴束余辉离轴辐射的计算公式。该公式适用于非均匀的星周物质服从n π r-2，这也建议SN 1998 bw/GRB 980425。通过适当选择参数，得到了与观测值相似的缓慢衰减率和X射线通量，从而进一步加强了GRB 980425与SN 1998 bw的关联。
A formula is derived for off-axis emissions from the beamed afterglow of gamma-ray bursts in a synchrotron model. The formula is applied to inhomogeneous circumstellar matter obeying n ∝ r-2, which is also suggested for SN 1998bw/GRB 980425. The slow decline rate as well as the X-ray flux, which is similar to the observed values, are obtained for an appropriate choice of parameters so that the association of GRB 980425 with SN 1998bw is further strengthened.