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arXiv 1208.3677astro-ph.HE
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130 GeV费米线的仪器解缠

Disentangling Instrumental Features of the 130 GeV Fermi Line

Daniel Whiteson

摘要:

我们研究了Fermi-LAT数据谱中在$E_γ=130$ GeV处观测到的峰值光子的仪器特征。我们使用{ \sc sPlots}算法分别对峰值光子和背景光子重建入射角分布、记录时间、航天器位置特征、天顶角、转换类型以及能量和方向重建的细节。在这样一个变量中存在显著的特征或集群,将表明峰值的仪器原因。在实验可用的数据中,我们发现了几个提示性的特征,这些特征可以为仪器专家的进一步研究提供信息,尽管信号样本的大小太小,无法得出统计学上显著的结论。

英文摘要:

We study the instrumental features of photons from the peak observed at $E_γ=130$ GeV in the spectrum of Fermi-LAT data. We use the {\sc sPlots} algorithm to reconstruct -- seperately for the photons in the peak and for background photons -- the distributions of incident angles, the recorded time, features of the spacecraft position, the zenith angles, the conversion type and details of the energy and direction reconstruction. The presence of a striking feature or cluster in such a variable would suggest an instrumental cause for the peak. In the publically available data, we find several suggestive features which may inform further studies by instrumental experts, though the size of the signal sample is too small to draw statistically significant conclusions.

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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