Observations of ultra-high-energy photons from Cygnus X-3

Details Observations of ultra-high-energy photons from Cygnus X-3 Observations of ultra-high-energy photons from Cygnus X-3

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373..657m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 657-664.

Astronomy and Astrophysics

Astrophysics

13

Cosmic Ray Showers, Gamma Ray Bursts, Interstellar Radiation, X Ray Binaries, X Ray Spectra, Cygnus Constellation, Muons, Nuclear Astrophysics, Radiation Detectors, Radio Bursts, Stellar Mass

Scientific paper

Extensive air showers coming from the Cygnus X-3 region are analyzed using the van der Klis and Bonnet-Bidaud ephemeris. A 4.7 sigma excess has been observed in the phase bin 0.25-0.3. The maximum excess is seen when a muon cut is applied to the showers, which indicates a slightly muon poor property. The flux is estimated to be (2.7 + or - 0.5) x 10 to the -14th/sq cm s for the showers Ne greater than 200,000. DC excesses are observed at the time of the radio burst of Cygnus X-3 in June 1989.

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