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Sensitivity of cosmic-ray experiments to ultra-high-energy photons: reconstruction of the spectrum and limits on the superheavy dark matter
O. E. Kalashev, G. I. Rubtsov, S. V. Troitsky
We estimate the sensitivity of various experiments detecting ultra-high-energy cosmic rays to primary photons with energies above 10^19 eV. We demonstrate that the energy of a prim…
Muon content of ultra-high-energy air showers: Yakutsk data versus simulations
A. V. Glushkov, I. T. Makarov, M. I. Pravdin +4
We analyse a sample of 33 extensive air showers (EAS) with estimated primary energies above 2\cdot 10^{19} eV and high-quality muon data recorded by the Yakutsk EAS array. We compa…
Air-shower simulations with and without thinning: artificial fluctuations and their suppression
D. S. Gorbunov, G. I. Rubtsov, S. V. Troitsky
The most common way to simplify extensive Monte-Carlo simulations of air showers is to use the thinning approximation. We study its effect on the physical parameters reconstructed…
Constraining the fraction of primary gamma rays at ultra-high energies from the muon data of the Yakutsk extensive-air-shower array
A. V. Glushkov, D. S. Gorbunov, I. T. Makarov +4
By making use of the data on the total signal and on the muon component of the air showers detected by the Yakutsk array, we analyze, in the frameworks of the recently suggested ev…
Towards event-by-event studies of the ultrahigh-energy cosmic-ray composition
D. S. Gorbunov, G. I. Rubtsov, S. V. Troitsky
We suggest a method which improves the precision of studies of the primary composition of ultra-high-energy cosmic rays. Two principal ingredients of the method are (1) comparison…
Upper limit on the ultra-high-energy photon flux from AGASA and Yakutsk data
G. I. Rubtsov, L. G. Dedenko, G. F. Fedorova +8
We present the interpretation of the muon and scintillation signals of ultra-high-energy air showers observed by AGASA and Yakutsk extensive air shower array experiments. We consid…