168 citations · 1.5k across the 49 of their papers we have counts for
6 papers · 2 filters
Thick fireballs and the steep decay in the early X-ray afterglow of gamma-ray bursts
Davide Lazzati, Mitchell C. Begelman
We study the early afterglows of gamma-ray bursts produced by geometrically thick fireballs, following the development of the external shock as energy is continually supplied to th…
A Gamma-Ray Burst Mission to Investigate the Properties of Dark Energy
D. Q. Lamb, G. R. Ricker, D. Lazzati +26
[Abridged] Very recently, relations between the peak energy of Gamma-Ray Burst burst spectra, the isotropic-equivalent energy of the burst, and the radiated energy of the burst hav…
Extinction properties of the X-ray bright/optically faint afterglow of GRB 020405
G. Stratta, R. Perna, D. Lazzati +3
We present an optical-to-X-ray spectral analysis of the afterglow of GRB 020405. The optical spectral energy distribution not corrected for the extragalactic extinction is signific…
SGR giant flares in the BATSE short GRB catalogue: constraints from spectroscopy
Davide Lazzati, Giancarlo Ghirlanda, Gabriele Ghisellini
The giant flare observed on Dec. 27th 2004 from SGR 1806-20 has revived the idea that a fraction of short (<2 s) Gamma Ray Bursts (GRBs) is due to giant flares from Soft Gamma Ray…
GRB jets inside and outside the star: precursors and cosmological implications
D. Lazzati, M. Begelman, G. Ghirlanda +2
After many years of speculation, recent observations have confirmed the association of gamma-ray bursts with core-collapse supernova explosions from massive stars. This association…
Universal GRB jets from jet-cocoon interaction in massive stars
Davide Lazzati, Mitchell Begelman
We consider the time-dependent evolution of a relativistic jet following its breakout through the surface of a massive compact star, as envisaged in the collapsar model of gamma-ra…