A search for TeV emission from Cygnus X-3

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gamma Ray Astronomy, Gamma Ray Spectra, Light Curve, X Ray Binaries, Cygnus Constellation, Periodic Variations, Pulsars, Radio Sources (Astronomy)

Scientific paper

Cygnus X-3 has been observed during 1988-1990 by the Whipple Observatory collaboration using the 109 pixel high-resolution gamma-ray imaging telescope. The data recorded has been analyzed to search for steady emission of TeV gamma-rays, 4.8 hr modulation of the gamma-ray light curve, and periodic emission at 12.59 ms. No evidence is found for emission based on these searches. The upper limit (3 sigma) for long-term steady emission is 3.5 x 10 exp -12 photons/cm s, a factor of 10 below fluxes reported a decade ago for this energy.

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