Abstract After more than two years of operation, the imaging γ-ray SIGMA telescope has accumulated several days of observation toward well known X-ray binaries. Four bright sources falling in this category have been detected so far: The pulsar GX 1+4 near the center of our galaxy, the stellar wind accreting system 4U 1700-377, and the black hole candidates Cygnus X-1 and GX 339-4. Moreover, SIGMA have observed three transients sources, which turned out to be also hard X-ray sources : The burster KS 1731-260, Tra X-1, and the Musca Nova. The properties of these systems in the SIGMA domain will be reviewed and a spectral distinction between black holes and neutron stars will be sketched.


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    Title :

    SIGMA observations of hard X-ray and soft gamma-ray emission from X-ray binaries


    Contributors:
    Laurent, P. (author) / Claret, A. (author) / Lebrun, F. (author) / Paul, J. (author) / Dennis, M. (author) / Barret, D. (author) / Bouchet, L. (author) / Mandrou, P. (author) / Sunyaev, R. (author) / Churazov, E. (author)

    Published in:

    Advances in Space Research ; 13 , 12 ; 139-148


    Publication date :

    1993-01-01


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    SIGMA Observations of Hard X-Ray and Soft Gamma-Ray Emission from X-Ray Binaries

    Laurent, P. / Claret, A. / Lebrun, F. et al. | British Library Conference Proceedings | 1993



    SIGMA observations of the soft Gamma-Ray Source GRS 1758-258

    Laurent, P. / Cordier, B. / Goldwurm, A. et al. | Elsevier | 1993


    SIGMA Observations of the Soft Gamma-Ray Source GRS 1758-258

    Laurent, P. / Cordier, B. / Goldwurm, A. et al. | British Library Conference Proceedings | 1993