Abstract The complex structure of the light curves of Swift GRBs (e.g. superimposed flares and shallow decay) has made their interpretation and that of the blast wave caused by the burst, more difficult than in the pre-Swift era. We aim to constrain the blast wave parameters: electron energy distribution, p, density profile of the circumburst medium, k, and the continued energy injection index, q. We do so by comparing the observed multi-wavelength light curves and X-ray spectra of a Swift sample to the predictions of the blast wave model. We can successfully interpret all of the bursts in our multi-wavelength sample of 10, except two, within the framework of the blast wave model, and we can estimate with confidence the electron energy distribution index for 6 of the sample. Furthermore we identify jet breaks in almost half of the bursts. The values of k suggest that the circumburst density profiles are not drawn from only one of the constant density or wind-like media populations. A statistical analysis of the distribution of p reveals that, even in the most conservative case of least scatter, the values are not consistent with a single, universal value. This is in agreement with our results for a larger sample of X-ray only afterglows which we summarise here.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Testing the blast wave model with Swift GRBs


    Beteiligte:
    Curran, P.A. (Autor:in) / Starling, R.L.C. (Autor:in) / van der Horst, A.J. (Autor:in) / Wijers, R.A.M.J. (Autor:in) / de Pasquale, M. (Autor:in) / Page, M. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 47 , 8 ; 1362-1366


    Erscheinungsdatum :

    2010-08-01


    Format / Umfang :

    5 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Testing the blast wave model with Swift GRBs

    Curran, P.A. | Online Contents | 2011


    The supercritical pile model for GRBs

    Mastichiadis, A. | Online Contents | 2007


    The supercritical pile model for GRBs

    Mastichiadis, A. / Kazanas, D. | Elsevier | 2006


    Magnetic fields in GRBs

    Lyutikov, Maxim | Online Contents | 2006


    Magnetic fields in GRBs

    Lyutikov, Maxim | Elsevier | 2004