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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    Title :

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


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

    Published in:

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


    Publication date :

    1991-01-01


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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