Measurement of the iron spectrum in cosmic rays by VERITAS

Measurement of the iron spectrum in cosmic rays by VERITAS
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使用 VERITAS 测量宇宙射线中的铁光谱

DOI:
10.1103/physrevd.98.022009
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发表时间:
2018
期刊:
影响因子:
5
通讯作者:
Falcone, A.
Falcone, A.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Archer, A.;Benbow, W.;Bird, R.;Brose, R.;Buchovecky, M.;Bugaev, V.;Connolly, M. P.;Cui, W.;Daniel, M. K.;Falcone, A.

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我们提出了一个新的测量铁核的能谱在宇宙线从20 TeV到500 TeV。测量使用了基于模板的分析方法,该方法首次应用于VERITAS成像大气切伦科夫望远镜阵列记录的铁诱导空气簇射的能量重建。事件选择利用带电粒子在第一次相互作用之前发射的直接切伦科夫光,以及与记录的空气簇射图像的形状相关的其他参数。测量的光谱在整个能量范围内符合幂律,f_0 =(4.82±0.98(stat)-2.70+2.12(syst))×10 ~(-7)m ~(-2)s ~(-1)TeV ~(-1)sr ~(-1)at,没有截止或谱突变的迹象。测得的差分通量与以前的结果是兼容的,在最高的能量与改进的统计不确定性。
We present a new measurement of the energy spectrum of iron nuclei in cosmic rays from 20 TeV to 500 TeV. The measurement makes use of a template-based analysis method, which, for the first time, is applied to the energy reconstruction of iron-induced air showers recorded by the VERITAS array of imaging atmospheric Cherenkov telescopes. The event selection makes use of the direct Cherenkov light which is emitted by charged particles before the first interaction, as well as other parameters related to the shape of the recorded air shower images. The measured spectrum is well described by a power lawover the full energy range, withand f0=(4.82±0.98(stat)-2.70+2.12(syst))×10-7  m-2 s-1 TeV-1 sr-1 at, with no indication of a cutoff or spectral break. The measured differential flux is compatible with previous results, with improved statistical uncertainty at the highest energies.
应用于CAT望远镜的甚高清成像大气切伦科夫望远镜新分析方法
DOI: --
发表时间: 1998
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影响因子: 5
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