Physics
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..526..535p&link_type=abstract
GAMMA-RAY BURSTS: 5th Huntsville Symposium. AIP Conference Proceedings, Volume 526, pp. 535-539 (2000).
Physics
2
Jets And Bursts, Galactic Winds And Fountains, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Gamma-Ray Sources, Gamma-Ray Bursts
Scientific paper
We propose that the angular inhomogeneities within the relativistic flow cause the same GRB to look very different to different observers. Consequently the most energetic bursts do not correspond to an exceptional energy release but instead they correspond to accidental exceptionally bright spots along the line of sight on colliding shells. We describe the patchy shell model and calculate the distribution function of the observed fluence for bursts with random angular fluctuations of ejecta. We predict, according to this model, that the GRB luminosity function will be much wider than the afterglow X-ray luminosity function and only little correlation between the γ-ray fluence and the afterglow emission. These two predictions are confirmed by the GRB-afterglow data. We also predict that the early (minutes to hours) afterglow would depict large temporal fluctuations whose amplitude decreases with time. Finally we predict that there should be many weak bursts with average afterglow luminosity in this scenario. .
Kumar Pawan
Piran Tsvi
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