Observation Of Transient High-Energy Emission Features In The Spectra Of Black-Hole Candidates And The Crab-Nebula By Granat Sigma

M. Gilfanov,E. Churazov,R. Sunyaev,N. Khavenson,B. Novikov,A. Dyachkov,I. Tserenin,K. Sukhanov,L. Bouchet,M. Denis,M. C. Schmitz-Fraysse,P. Mandrou,J. Paul,B. Cordier,A. Goldwurm,F. Lebrun

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES（1994）

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摘要

Three years of Granat/SIGMA observations have demonstrated that appearance of transient emission spectral features, probably associated 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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关键词

BLACK HOLE PHYSICS, GALAXY, CENTER, GAMMA-RAYS, OBSERVATIONS, ISM, INDIVIDUAL (CRAB NEBULA), X-RAYS, GENERAL

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