Astronomy and Astrophysics – Astronomy
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268l..17s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 268, May 1, 1983, p. L17-L21. Sponsorship: Deutsche
Astronomy and Astrophysics
Astronomy
294
Cosmic Ray Showers, Cygnus Constellation, Energetic Particles, Gamma Ray Astronomy, Periodic Variations, X Ray Sources, Angular Resolution, Energy Spectra, Luminosity, Particle Flux Density, Photon Density
Scientific paper
Kiel, West Germany air shower experiment data are analyzed with a view to the detection of showers from Cyg X-3, with a measurement resolution of 1 deg and an on-source observation time of 3838 hr over a sensitive area of 2800 sq m. In addition to a 4.4-sigma excess of showers from the direction of delta = 40.9 + or - 1.5 deg and alpha = 307.8 + or - 2.0 deg, the time-averaged analysis indicates the typical 4.8-hr modulation of the excess showers. The time-averaged integral gamma-ray flux derived corresponds to a luminosity of 6 x 10 to the 36th ergs/sec in the 2 x 10 to the 15th-2 x 10 to the 16th eV energy region, establishing this as the first experimental evidence for a clearly identified gamma-ray point source which emits at energies greater than 10 to the 15th eV.
Samorski M.
Stamm W.
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