Imaging observations at hard X-ray and gamma-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 gamma-ray telescope developed by Caltech. The first coded aperture images of the Galactic center region above 35 keV reveal a strong gamma-ray source located 0.7 + or - 0.1 deg 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:

    Erscheinungsdatum :

    01.01.1991



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


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

    Cook, W.R. / Grunsfeld, J.M. / Heindl, W.A. et al. | Elsevier | 1991


    Observations of A0535+26 transient X-ray source

    Estulin, I.V. / Rakhamimov, Sh.Yu. / Novak, B.L. et al. | Elsevier | 1981


    Stellar Wind Accretion Driven Pulsar A0535+26: GRANAT/WATCH Long-Term Observations

    Chichkov, M. / Sunyaev, R. / Sazonov, S. et al. | British Library Online Contents | 1997


    Observations of 1–30 MeV gamma rays from the galactic center

    Zanrosso, E. / Long, J.L. / Zych, A.D. et al. | Elsevier | 1981