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New Estimation of the Spectral Index of High-Energy Cosmic Rays as Determined by the Compton-Getting Anisotropy
The amplitude of the Compton-Getting (CG) anisotropy contains the powerlaw index of the cosmic-ray energy spectrum.Based on this relation and using the Tibet air-shower array data, we measure the cosmic-ray spectral index to be -3.03±0.55stat ± < 0.62 syst between 6 TeV and 40 TeV, consistent with -2.7 from direct …