Observations of the Gamma-Ray Flux from the X-ray Source Cyg X-3 in 1994-1995

Details Observations of the Gamma-Ray Flux from the X-ray Source Cyg X-3 in 1994-1995 Observations of the Gamma-Ray Flux from the X-ray Source Cyg X-3 in 1994-1995

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003astl...29..236n&link_type=abstract

Astronomy Letters, vol. 29, p. 236-240 (2003)

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the observations of Cygnus X-3 carried out with the GT-48 gamma-ray telescope at the Crimean Astrophysical Observatory in 1994-1995. The mean gamma-ray flux at energy E > 1012 eV is shown to be approximately equal to 1.3 x 10^{-11} cm^{-2} s^{-1}. The flux in 1994 was much lower than that in 1995, being (6.2 +/- 2.6) x 10^{-12} cm^{-2} s^{-1}; i.e., it was statistically insignificant. The flux in 1995 was (2.7 +/- 0.7) x 10^{-11} cm^{-2} s^{-1}. Thus, the very high energy gamma-ray emission from Cyg X-3 is variable. These measurement results can be used to obtain upper limits on the flux from Cyg X-3 in 1994-1995.

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