Zenith angle distribution of cosmic ray showers measured with the Yakutsk array and its application to the analysis of arrival directions in equatorial coordinates

The Yakutsk array data set in the energy interval (1017,1019) eV is revisited in order to interpret the zenith angle distribution of an extensive air shower event rate of ultra-high-energy cosmic rays. The close relation of the distribution to the attenuation of the main measurable parameter of show...

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Veröffentlicht in:	Physical review. D 2018-04, Vol.97 (8), p.083003, Article 083003
1. Verfasser:	Ivanov, A. A.
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Sprache:	eng
Schlagworte:	Arrays Attenuation Background radiation Cosmic ray showers Cosmic rays Declination Null hypothesis Zenith
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container_title	Physical review. D
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creator	Ivanov, A. A.
description	The Yakutsk array data set in the energy interval (1017,1019) eV is revisited in order to interpret the zenith angle distribution of an extensive air shower event rate of ultra-high-energy cosmic rays. The close relation of the distribution to the attenuation of the main measurable parameter of showers, ρ600, is examined. Measured and expected distributions are used to analyze the arrival directions of cosmic rays on an equatorial map including the energy range below 1018 eV, which was previously avoided due to the reduced trigger efficiency of the array in the range. While the null hypothesis cannot be rejected with data from the Yakutsk array, an upper limit on the fraction of cosmic rays from a separable source in the uniform background is derived as a function of declination and energy.
doi_str_mv	10.1103/PhysRevD.97.083003
format	Article
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subjects	Arrays Attenuation Background radiation Cosmic ray showers Cosmic rays Declination Null hypothesis Zenith
title	Zenith angle distribution of cosmic ray showers measured with the Yakutsk array and its application to the analysis of arrival directions in equatorial coordinates
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