The Hard X-ray Burst Spectrometer (HXRBS) and the Gamma-Ray Spectrometer (GRS) on NASA's Solar Maximum Mission satellite have independently monitored cosmic gamma-ray bursts since launch in February 1980. Several bursts with relatively simple pulse structure and sufficient intensity have been analyzed for evidence of spectral variability on time scales shorter than the pulse durations. In many of these bursts pulse structures are found, ranging in duration from 1 to 10 seconds, which exhibit a trend of hard-to-soft spectral evolution. No significant evidence for soft-to-hard evolution has been found. The HXRBS data above 100 keV and the GRS data above 1 MeV indicate that the spectral evolution generally is not due to time-varying absorption features at energies below 100 keV.


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    Titel :

    Spectral evolution in gamma-ray bursts


    Beteiligte:
    Norris, J. P. (Autor:in) / Share, G. H. (Autor:in) / Messina, D. C. (Autor:in) / Matz, M. (Autor:in) / Kouveliotou, C. (Autor:in) / Dennis, B. R. (Autor:in) / Desai, U. D. (Autor:in) / Cline, T. L. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1986-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Spectral evolution in gamma-ray bursts

    Norris, J.P. / Kouveliotou, C. / Share, G.H. et al. | Elsevier | 1986



    The Spectral Evolution of Classical Gamma-Ray Bursts

    Band, D. / Ford, L. / COSPAR; Scientific Commission E | British Library Conference Proceedings | 1998



    Gamma-Ray Bursts

    G. J. Fishman | NTIS | 2012