Abstract
Earlier we suggested a new method to search for sources and anisotropy of the arrival directions of ultra high energy particles. Here using this method we analyzed the data of the Yakutsk EAS array and found that particle fluxes with energies E eV come to the Earth from our Galaxy and the arrival directions of particles correlate with known pulsars. The chance probability of correlating particles with pulsars and the anisotropy of the distribution of particles is 10−4 –10−5 . We also analyzed the Telescope Array (TA) data with energies E eV by our method and found that the maximum of the distribution of particles points to extragalactic sources but the direction of the maximum does not coincide with the maximum direction of the distribution of particles found by the authors of the Telescope Array data (the maximums of the arrival directions received by two different methods of analyses differ by about 10%).
Highlights
From 1974 near Yakutsk, Russia, an extensive air shower array (EAS) of area 18 km2 began to register extensive air showers
The Yakutsk array consists of 49 surface scintillation plastic detectors each of area 2 × 2 m2, 9 surface scintillation plastic detectors of area 2 m2 for electrons and photons, 5 underground scintillation plastic detectors of 20 m2 for muons with an energy threshold of Eμ > 1 × secθ GeV and 45 Cherenkov light detectors for registering electrons and photons
We considered the arrival directions of extensive air shower for particles with zenith angles θ < 60◦ and cores located inside the array perimeter
Summary
From 1974 near Yakutsk, Russia, an extensive air shower array (EAS) of area 18 km began to register extensive air showers. The Yakutsk array consists of 49 surface scintillation plastic detectors each of area 2 × 2 m2, 9 surface scintillation plastic detectors of area 2 m2 for electrons and photons, 5 underground scintillation plastic detectors of 20 m2 for muons with an energy threshold of Eμ > 1 × secθ GeV (where θ is the zenith angle) and 45 Cherenkov light detectors for registering electrons and photons. In the center of the array is a muon detector of 192 m2 to register muons with energy Eμ > 0.5 × secθ GeV. We analyzed the distribution of particles in the celestial sphere of the Yakutsk array data [3] by classic methods (harmonics analyses) and by our suggested method. We considered the arrival directions of extensive air shower for particles with zenith angles θ < 60◦ and cores located inside the array perimeter. The threshold energy of the primary particles was E ≥ 5.1018 eV and the energy and arrival direction were determined with an accuracy of ∼30% and ∼5–7◦ respectively
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