BEXCO - Room F(201/202/203/204)
[CRI303] Constraints on the flux of ∼ (10−300) PeV cosmic photons from the EAS-MSU muon data
We report the results of the search for ∼ (10−300) PeV primary cosmic-ray photons with the data of the Moscow State University (MSU) Extensive Air Shower (EAS) array. The muon content of the showers recorded by the underground part of the array was used as the hadron/photon discriminating observable. The full-scale reanalysis of the data with modern simulations of the installation does not confirm previous indications of the excess of gamma-ray candidate events. Upper limits on the corresponding gamma-ray flux are presented. The limits are the most stringent ones at energies ∼ 100 PeV.