The ``Canonical'' GRBs within the fireshell model

Details The ``Canonical'' GRBs within the fireshell model The ``Canonical'' GRBs within the fireshell model

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1053..267b&link_type=abstract

OBSERVATIONAL EVIDENCE FOR BLACK HOLES IN THE UNIVERSE: Proceedings of the 2nd Kolkata Conference on Observational Evidence for

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Gamma-Ray Sources, Gamma-Ray Bursts, Galactic Nuclei, Circumnuclear Matter, And Bulges, Gravitational Radiation, Magnetic Fields, And Other Observations

Scientific paper

Within the fireshell model we define a ``canonical'' GRB light curve with two sharply different components: the Proper-GRB (P-GRB), emitted when the optically thick fireshell of electron-positron plasma originating the phenomenon reaches transparency, and the afterglow, emitted due to the collision between the remaining optically thin fireshell and the CircumBurst Medium (CBM). On the basis of the recent understanding of GRB970228 as the prototype for a new class of GRBs with ``an occasional softer extended emission lasting tenths of seconds after an initial spikelike emission'' we outline our ``canonical'' GRB scenario, originating from the gravitational collapse to a black hole, with a special emphasis on the discrimination between short GRBs and the ones appearing as such due to their peculiar astrophysical setting.

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