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What did we learn from the extremely bright gamma ray bursts 990123 and 080319B?
Shlomo Dado, Arnon Dar
The two brightest and so far the best studied gamma ray bursts (GRBs), 990123 and 080319B, were ordinary, highly collimated GRBs produced in a core collapse supernova explosion wit…
The diverse broad-band light-curves of Swift GRBs reproduced with the cannonball model
Shlomo Dado, Arnon Dar, A. De Rujula
Two radiation mechanisms, inverse Compton scattering (ICS) and synchrotron radiation (SR), suffice within the cannonball (CB) model of long gamma ray bursts (LGRBs) and X-ray flash…
Short Hard Gamma Ray Bursts And Their Afterglows
Shlomo Dado, Arnon Dar
Long duration gamma ray bursts (GRBs) and X-ray flashes (XRFs) are produced by highly- relativistic jets ejected in core-collapse supernova explosions. The origin of short hard gam…
Is there anything special about GRB 080319B?
Shlomo Dado, Arnon Dar, A. De Rujula
We show that the properties of gamma ray burst 080319B and its afterglow are well reproduced by the cannonball model of long gamma ray bursts (GRBs). It was an ordinary GRB, produc…
'Jet breaks' and 'missing breaks' in the X-Ray afterglow of Gamma Ray Bursts
Shlomo Dado, Arnon Dar, A. De Rujula
The X-ray afterglows (AGs) of Gamma-Ray Bursts (GRBs) and X-Ray Flashes (XRFs) have, after the fast decline phase of their prompt emission, a temporal behaviour varying between two…
The rapid decline of the prompt emission in Gamma-Ray Bursts
Shlomo Dado, Arnon Dar, A. De Rujula
Many gamma ray bursts (GRBs) have been observed with the Burst-Alert and X-Ray telescopes of the Swift satellite. The successive `pulses' of these GRBs end with a fast decline and…