Methodological Issues of Gamma-Ray and Neutrino Searches at the Yakutsk Array


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Abstract

The method used to perform searches for extensive air showers (EAS) generated by neutral particles, such as high-energy gamma rays and astrophysical neutrinos, and the results of such searches are presented. A comprehensive analysis of relevant data, including those on EAS electrons, muons, and Cherenkov light and their time responses in scintillation and Cherenkov detectors, is performed for this purpose. An upper limit on the gamma-ray flux at the energies of 3 × 1018, 1019, and 3 × 1019 eV is set. A multivariate analysis of EAS properties of neutrino-induced air showers does not reveal neutrino-induced showers.

About the authors

S. P. Knurenko

Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Author for correspondence.
Email: s.p.knurenko@ikfia.ysn.ru
Russian Federation, pr. Lenina 31, Yakutsk, 677980

Z. E. Petrov

Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Email: s.p.knurenko@ikfia.ysn.ru
Russian Federation, pr. Lenina 31, Yakutsk, 677980

I. S. Petrov

Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Email: s.p.knurenko@ikfia.ysn.ru
Russian Federation, pr. Lenina 31, Yakutsk, 677980

Yu. A. Egorov

Institute of Cosmophysical Research and Aeronomy, Siberian Branch

Email: s.p.knurenko@ikfia.ysn.ru
Russian Federation, pr. Lenina 31, Yakutsk, 677980

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