1997•The Astrophysical JournalOpen access
Cygnus X‐3 and EGRET Gamma‐Ray Observations
M. Mori, D. L. Bertsch, B. L. Dingus, J. A. Esposito, C. E. Fichtel, S. D. Hunter, G. Kanbach, D. A. Kniffen, Y. C. Lin, J. R. Mattox, H. A. Mayer‐Hasselwander, P. F. Michelson, C. von Montigny, R. Mukherjee, P. L. Nolan, P. V. Ramanamurthy, E. J. Schneid, P. Sreekumar, D. J. Thompson
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Abstract
0!rQ1The Energetic Gamma Ray Experiment Telescope (EGRET) aboard the Compton Gamma Ray Observatory observed the Cygnus region in 14 different viewing periods during 1991 May to 1994 July. We present here our results on unpulsed and pulsed emissions of gamma rays at E > 50 MeV from Cyg X-3. While we detect a gamma-ray source consistent with the position of Cyg X-3, there was no evidence for the characteristic ~4.79 hr periodicity observed in X-rays and infrared.
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