Swift Identification of Dark Gamma-Ray Bursts
Swift Identification of Dark Gamma-Ray Bursts
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DOI：
10.1086/427089
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
P. Jakobsson;P. Jakobsson;J. Hjorth;J. Fynbo;D. Watson;K. Pedersen;G. Björnsson;J. Gorosabel;J. Gorosabel
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文献类型：
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作者：
P. Jakobsson;P. Jakobsson;J. Hjorth;J. Fynbo;D. Watson;K. Pedersen;G. Björnsson;J. Gorosabel;J. Gorosabel
我们提出了所有已知的伽玛射线爆发（GRBs）的光通量与x射线通量图，其中x射线余辉已被检测到。我们提出了一个可操作的暗爆发定义，即那些相对于火球模型光学次发光的爆发，即具有光学- x射线光谱指数βox < 0.5。在52个grb样本中，我们发现了5个暗爆发。该定义和图表可作为基于有限信息识别暗grb的简单快速诊断工具，特别适用于Swift卫星观测到的暗grb的早期和客观识别。
We present an optical flux versus X-ray flux diagram for all known gamma-ray bursts (GRBs) for which an X-ray afterglow has been detected. We propose an operational definition of dark bursts as those bursts that are optically subluminous with respect to the fireball model, i.e., that have an optical-to-X-ray spectral index βox < 0.5. Out of a sample of 52 GRBs, we identify five dark bursts. The definition and diagram serve as a simple and quick diagnostic tool for identifying dark GRBs based on limited information, particularly useful for early and objective identification of dark GRBs observed with the Swift satellite.