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The Collimation-corrected Gamma-Ray Burst Energies Correlate with the Peak Energy of Their νFν Spectrum
We consider all bursts with known redshift and νFν peak energy, E. For a good fraction of them an estimate of the jet opening angle is available from the achromatic break of their afterglow lightExpand
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General physical properties of bright Fermi blazars
We studied all blazars of known redshift detected by the Fermi satellite during its first 3-month survey. For the majority of them, pointed Swift observations ensure a good multiwavelength coverage,Expand
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The transition between BL Lac objects and flat spectrum radio quasars
We study the BL Lac objects detected in the one year all sky survey of the Fermi satellite, with a energy spectral slope α in the [0.1‐100 GeV] band greater than 1.2. In the α vs γ‐ray luminosityExpand
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GeV emission from gamma‐ray bursts: a radiative fireball?
We study the emission observed at energies > 100 MeV of 11 gamma-ray bursts (GRBs) detected by the Fermi-Large Area Telescope (LAT) until 2009 October. The GeV emission has three main properties: (i)Expand
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Spectroscopic identification of r-process nucleosynthesis in a double neutron-star merger
The merger of two neutron stars is predicted to give rise to three major detectable phenomena: a short burst of γ-rays, a gravitational-wave signal, and a transient optical–near-infrared sourceExpand
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SN 2003lw and GRB 031203: A Bright Supernova for a Faint Gamma-Ray Burst
Optical and near-infrared observations of the gamma-ray burst GRB 031203, at z = 0.1055, are reported. A very faint afterglow is detected superposed onto the host galaxy in our first infrared JHKExpand
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Jet and accretion power in the most powerful Fermi blazars
Among the blazars detected by the Fermi satellite, we have selected the 23 blazars that in the 3 months of survey had an average γ-ray luminosity above 10 48 erg s -1 . For 17 out of the 23 sourcesExpand
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Spectral properties of 438 GRBs detected by Fermi/GBM
We present the results of the spectral analysis of the public data of 438 Gamma Ray Bursts (GRBs) detected by the Fermi Gamma ray Burst Monitor (GBM) up to March 2010. For 432 bursts we could fit theExpand
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We present a carefully selected sub-sample of Swift long gamma-ray bursts (GRBs) that is complete in redshift. The sample is constructed by considering only bursts with favorable observing conditionsExpand
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Gamma-Ray Bursts: New Rulers to Measure the Universe
The best measure of the universe should be done using a standard "ruler" at any redshift. Type Ia supernovae (SN Ia) probe the universe up to z ~ 1.5, while the cosmic microwave background (CMB)Expand
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