1. Cygnus X-3 observation in gamma-ray energy range >1014 eV
- Author
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V. V. Alexeenko, V. V. Sklyarov, S. Kh. Ozrokov, N. S. Khaerdinov, G. Navarra, V. A. Tizengauzen, A. E. Chudakov, A. S. Lidvansky, Ya. S. Elensky, and N. I. Metlinsky
- Subjects
Physics ,Range (particle radiation) ,Air shower ,Gamma ray ,Spectral energy distribution ,Flux ,Astronomy ,Cosmic ray ,Angular resolution ,Astrophysics ,Spectral resolution - Abstract
We present experimental data on observations of Cygnus X-3 using an air shower array. The angular resolution of the array is of the order of 1 degree and the median energy of showers isE 0≿1014 eV. During one year of observation there was no absolute excess of the number of showers from the source region and a small peak at the phase plot has only limited statistical significance. The value of UHE gammaray flux (if there exists any) seems to be in contradiction with values previously reported by Kiel and Haverah Park groups. We have analysed separately a sample of experimental data covering the short period in October 1985, when a radioburst from Cygnus X-3 was observed. Considerable excess of showers from the source was found in this sample: it lasted for three days with the maximal effect (40% excess) in the first one, 14th of October 1985.
- Published
- 1987
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