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arXiv 0802.3815astro-ph
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具有BAT瞬发特性的高z伽玛暴的筛选

Screening High-z GRBs with BAT Prompt Emission Properties

T. N. Ukwatta, T. Sakamoto, M. Stamatikos, N. Gehrels, K. S. Dhuga

摘要:

探测高Z伽玛暴对于限制伽玛暴的形成速率、追踪宇宙再电离和金属丰度的历史具有重要意义。基于目前雨燕探测到的具有已知红移的伽玛暴样本,我们使用BAT逐事件数据研究了红移与光谱和时间特性之间的关系。我们发现红移趋势的峰值通量归一化的时间宽度T90,光变曲线方差,峰值通量,和光子指数在简单的幂律拟合BAT事件数据。我们已经建立了筛选具有高红移的伽玛暴的标准。这将使我们能够更快地向GRB社区提供可能的高Z爆发警报。

英文摘要:

Detecting high-z GRBs is important for constraining the GRB formation rate, and tracing the history of re-ionization and metallicity of the universe. Based on the current sample of GRBs detected by Swift with known redshifts, we investigated the relationship between red-shift, and spectral and temporal characteristics, using the BAT event-by-event data. We found red-shift trends for the peak-flux-normalized temporal width T90, the light curve variance, the peak flux, and the photon index in simple power-law fit to the BAT event data. We have constructed criteria for screening GRBs with high red-shifts. This will enable us to provide a much faster alert to the GRB community of possible high-z bursts.

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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