Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..452n&link_type=abstract
(Pis'ma v Astronomicheskii Zhurnal, vol. 12, June 1986, p. 452-457) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, May-June
Astronomy and Astrophysics
Astronomy
2
Cygnus Constellation, Gamma Rays, Periodic Variations, Variable Stars, X Ray Stars, Cerenkov Radiation, Histograms, Statistical Analysis, Time Dependence
Scientific paper
Data from the Crimean Astrophysical Observatory (CAO) and other facilities on the ultrahigh-energy (E greater than or equal to 2 x 10 to the 12th eV) gamma rays coming from the direction of the Cyg X-3 source are analyzed. Histograms are presented for the gamma-ray signal/noise ratio as a function of phase of candidate 328- and 19.58-day variability periods. Good agreement between CAO and T'ien Shan station data confirms the presence of a cycle in the ultrahigh-energy gamma-ray flux with a period of 19.58 + or - 0.02 days.
Neshpor Yu I.
Zyskin Yu. L.
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