Observation of periodic gamma radiation from the discrete source Cygnus X-3

Details Observation of periodic gamma radiation from the discrete source Cygnus X-3 Observation of periodic gamma radiation from the discrete source Cygnus X-3

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977zhpmr..26..381g&link_type=abstract

(ZHETF Pis'ma v Redaktsiiu, vol. 26, Sept. 5, 1977, p. 381-385.) JETP Letters, vol. 26, Sept. 5, 1977, p. 259-263. Translation.

Astronomy and Astrophysics

Astronomy

Cygnus Constellation, Gamma Ray Astronomy, Stellar Radiation, Telescopes, X Ray Sources, Balloon-Borne Instruments, Phase Shift, Photon Beams, Spark Chambers, Stellar Luminosity

Scientific paper

A spark-chamber telescope mounted on high-altitude balloons was used in 1972, 1974, and 1976 to measure fluxes of gamma rays of energy exceeding 40 MeV from the discrete source Cygnus X-3. The radiation was found to be variable, with a period of 0.199686 day, coinciding with the X-ray period. The detected gamma radiation is concentrated in a narrow pulse of duration less than 1 hour, which arises near the minimum of the X-ray flux. The gamma-ray luminosity of the Cygnus X-3 source is of the order of 10 to the 38th power erg/sec.

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