Observation of transient high-energy emission features in the spectra of black hole candidates and the Crab Nebula by Granat/SIGMA

Details Observation of transient high-energy emission features in the spectra of black hole candidates and the Crab Nebula by Granat/SIGMA Observation of transient high-energy emission features in the spectra of black hole candidates and the Crab Nebula by Granat/SIGMA

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..411g&link_type=abstract

The Astrophysical Journal Supplement Series, vol. 92, no. 2, p. 411-418

Astronomy and Astrophysics

Astronomy

30

Black Holes (Astronomy), Crab Nebula, Emission Spectra, Gamma Ray Astronomy, Positron Annihilation, Stellar Radiation, Flux (Rate), Novae, X Ray Sources

Scientific paper

Three years of Granat/SIGMA observations have demonstrated that appearance of transient emission spectral features, probably associate with annihilation of electron-positron pairs, is not a unique phenomenon for Galactic compact hard X-ray sources. During 1990-1992, such features have been detected in the spectra of two black hole candidates (1E 1740.7-2942 and Nova Muscae 1991) and the Crab Nebula.

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