Evidence for 10 to the 18th-eV neutral particles from the direction of Cygnus X-3

Details Evidence for 10 to the 18th-eV neutral particles from the direction of Cygnus X-3 Evidence for 10 to the 18th-eV neutral particles from the direction of Cygnus X-3

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvl..62..383c&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 62, Jan. 23, 1989, p. 383-386.

Mathematics

Probability

70

Cosmic Ray Showers, Neutral Particles, Spectrum Analysis, Angular Resolution, Cygnus Constellation, Particle Energy, Probability Density Functions

Scientific paper

Analysis of the cumulative Fly's Eye data reveals an excess of air showers from the direction of Cygnus X-3 at energies above 0.5 x 10 to the 18th eV. No point source has previously been identified at such high energies. The probability of this excess arising as a chance clustering of isotropic cosmic rays is 0.00065. The inferred signal flux is (2.0 + or - 0.6) x 10 to the -17th particles/sq cm s. The Cygnus X-3 4.8-h periodicity is weakly present in the data.

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