G. B. Pisani

Early X-ray Flares in GRBs

We analyze the early X-ray flares in the GRB flare-plateau-afterglow (FPA) phase observed by Swift-XRT. The FPA occurs only in one of the seven GRB subclasses: the binary-driven hypernovae (BdHNe). This subclass consists of long GRBs with a carbon-oxygen core and a neutron star (NS) binary companion as progenitors. The hypercritical accretion of the supernova (SN) ejecta onto the NS can lead to the gravitational collapse of the NS into a black hole. Consequently, one can observe a GRB emission with isotropic energy

GRB 090227B: THE MISSING LINK BETWEEN THE GENUINE SHORT AND LONG GRBS

E_{iso}gtrsim10^{52}

The binary systems associated with short and long gamma-ray bursts and their detectability

~erg, as well as the associated GeV emission and the FPA phase. Previous work had shown that gamma-ray spikes in the prompt emission occur at

The cosmic matrix in the 50th anniversary of relativistic astrophysics

sim 10^{15}

GRB 140619B: a short GRB from a neutron star merger leading to the black hole formation

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On the rate and on the gravitational wave emission of short and long GRBs

10^{17}

On the thermal and double episode emissions in GRB 970828

~cm with Lorentz gamma factor

On the role of the Kerr-Newman black hole in the GeV emission of long gamma-ray bursts.

Gammasim10^{2}

Evolution of an electron-positron plasma produced by induced gravitational collapse in binary-driven hypernovae

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The binary progenitors of short and long GRBs and their gravitational-wave emission

10^{3}