Abstract Imaging observations at hard X-ray and γ-ray energies of the Galactic center and Crab/A0535+26 regions are presented. The measurements were made in a series of high altitude balloon flights of a coded aperture γ-ray telescope developed by Caltech. The first coded aperture images of the Galactic center region above 35 keV reveal a strong γ-ray source located 0.7 ± 0.1° away from the Galactic nucleus, consistent with the known X-ray source 1E1740.7-2942. In addition a second source consistent in position with GX354+0 has been observed. Flux estimates and upper limits from two other known sources are also discussed. Coded aperture observations of the Crab and A0535+26 are presented, demonstrating the ability of coded aperture instruments to observe multiple time variable sources simultaneously.


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    Titel :

    Recent results of Gamma-ray imaging observations of the Galactic center and Crab/A0535+26 regions


    Beteiligte:
    Cook, W.R. (Autor:in) / Grunsfeld, J.M. (Autor:in) / Heindl, W.A. (Autor:in) / Palmer, D.M. (Autor:in) / Prince, T.A. (Autor:in) / Schindler, S.M. (Autor:in) / Starr, C.H. (Autor:in) / Stone, E.C. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 11 , 8 ; 191-202


    Erscheinungsdatum :

    01.01.1991


    Format / Umfang :

    12 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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