The observation of MeV gamma radiation from a burst on August 5, 1985 is reported. The burst was dominated by a single peak about 2 s wide, with softer, lower-level emission lasting about 20 s anywhere in the burst in any energy range. In the energy range from about 560 keV to about 10 MeV, the burst peaked about 0.3 s before the peak at lower energies. Radiation in the 10-16 MeV energy range was detected about 3 s before the lower-energy radiation, with roughly the same pulse width. This radiation was not detected during the main part of the burst. The energy of this burst in the range above 1 MeV was a significant fraction of the total burst energy, confirming earlier SMM results. If the appearance of high-energy photons prior to those at low energies is a ubiquitous feature of bursts or a class of bursts, current theoretical models may require considerable revision.


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    Titel :

    Observation of a strong gamma-ray burst on the Spacelab 2 mission


    Beteiligte:
    Fishman, G. J. (Autor:in) / Paciesas, W. S. (Autor:in) / Meegan, C. A. (Autor:in) / Wilson, R. B. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1986-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Observation of a strong gamma-ray burst on the spacelab 2 mission

    Fishman, G.J. / Paciesas, W.S. / Meegan, C.A. et al. | Elsevier | 1986




    Spacelab 3 mission

    Dalton, Bonnie P. | NTRS | 1990


    The Spacelab J mission

    CREMIN, J. / LESLIE, F. | AIAA | 1990