Sigma results on the past variability of CYG X-1 in the hard X-ray/gamma-ray energy band

Details Sigma results on the past variability of CYG X-1 in the hard X-ray/gamma-ray energy band Sigma results on the past variability of CYG X-1 in the hard X-ray/gamma-ray energy band

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..355m&link_type=abstract

IN: Gamma-ray line astrophysics; Proceedings of the International Symposium, Paris, France, Dec. 10-13, 1990 (A92-43619 18-90).

Astronomy and Astrophysics

Astronomy

1

Black Holes (Astronomy), Gamma Ray Spectra, Pulsars, Soviet Spacecraft, X Ray Telescopes, Accretion Disks, Autocorrelation, Binary Stars, Energy Spectra

Scientific paper

The black-hole candidate Cyg X-1 has been one of the first targets of the Sigma gamma-ray telescope on board the Soviet Granat spacecraft. Sigma, an imaging telescope based on the coded mask principle, operates in the 35 keV-1.3 MeV energy range and, when used in 'fast variability' mode, has a time resolution of one millisecond. This paper presents the preliminary results of a fast variability observation of Cyg X-1 performed in March 1990.

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