Search for gamma-quanta with energy ∼1015 eV in the primary cosmic radiation

Abstract The extensive air showers (EAS) experimental data, registrated with the help of the Tien Shan array during the effective running time of 17461 hours, have been analyzed. On the basis of EAS, poor in muons with energy E μ > 5 GeV and in high energy hadrons, the primary flux of the gamma-quanta was estimated.