Abstract We report the first detection of two soft gamma ray transients GX 354-0 and Nova Persei (GRO J0422+32) by the coded-mask telescope SIGMA. Only preliminary results are presented with regard to Nova Persei while special emphasis is given to the data on GX 354-0 which has been monitored during the 1992 February–April survey of the Galactic Center. GX 354-0 underwent two flares of about two week duration and its average spectrum is well described by a thermal Bremsstrahlung model or a broken power law whereas the Nova Persei spectrum seems to be similar to the one observed for GRS 1124-684 in Musca.


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    Title :

    SIGMA observations of two new hard X-ray and soft gamma-ray transients: GX 354-0 and Nova Persei


    Contributors:
    Claret, A. (author) / Ballet, J. (author) / Goldwurm, A. (author) / Lebrun, F. (author) / Roques, J.P. (author) / Bouchet, L. (author) / Schmitz-Fraysse, M.C. (author) / Mandrou, P. (author) / Sunyaev, R. (author) / Churazov, E. (author)

    Published in:

    Advances in Space Research ; 13 , 12 ; 735-738


    Publication date :

    1993-01-01


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    SIGMA Observations of Two new Hard X-Ray and Soft Gamma-Ray Transients: GX 354-0 and Nova Persei

    Claret, A. / Ballet, J. / Goldwurm, A. et al. | British Library Conference Proceedings | 1993


    GRANAT/SIGMA Observations of X-ray Nova Persei 1992

    Finoguenov, A. / Gilfanov, M. / Churazov, E. et al. | British Library Conference Proceedings | 1997


    Über die Nebel der Nova Persei

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