Search Results - "Ghisellini, Gabriele"

The Blazar Sequence and Its Physical Understanding by Prandini, Elisa, Ghisellini, Gabriele

“…Introduced in 1998 to attempt a first unified view of the broad-band emission properties of blazars, the blazar sequence has been extensively used in the past…”
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The Blazar Sequence 2.0 by Ghisellini, Gabriele

“…This paper discusses the spectral energy distribution (SED) of all blazars with redshift detected by the Fermi satellite and listed in the 3LAC catalog. The so…”
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Spine–sheath layer radiative interplay in subparsec-scale jets and the TeV emission from M87 by Tavecchio, Fabrizio, Ghisellini, Gabriele

“…Simple one-zone homogeneous synchrotron self-Compton models have severe difficulties in explaining the TeV emission observed in the radio galaxy M87. Also, the…”
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The spectrum of the broad-line region and the high-energy emission of powerful blazars by Tavecchio, Fabrizio, Ghisellini, Gabriele

“…High-energy emission (from the X-ray through the γ-ray band) of Flat Spectrum Radio Quasars is widely associated with the inverse Compton (IC) scattering of…”
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Spectral index-flux relation for investigating the origins of steep decay in γ-ray bursts by Ronchini, Samuele, Oganesyan, Gor, Branchesi, Marica, Ascenzi, Stefano, Bernardini, Maria Grazia, Brighenti, Francesco, Dall’Osso, Simone, D’Avanzo, Paolo, Ghirlanda, Giancarlo, Ghisellini, Gabriele, Ravasio, Maria Edvige, Salafia, Om Sharan

“…γ -ray bursts (GRBs) are short-lived transients releasing a large amount of energy (10 51  − 10 53  erg) in the keV-MeV energy range. GRBs are thought to…”
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Jets, black holes and disks in blazars by Ghisellini, Gabriele

“…The Fermi and Swift satellites, together with ground based Cherenkov telescopes, has greatly improved our knowledge of blazars, namely Flat Spectrum Radio…”
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Where and When: Optimal Scheduling of the Electromagnetic Follow-up of Gravitational-wave Events Based on Counterpart Light-curve Models by Salafia, Om Sharan, Colpi, Monica, Branchesi, Marica, Chassande-Mottin, Eric, Ghirlanda, Giancarlo, Ghisellini, Gabriele, D. Vergani, Susanna

“…The electromagnetic (EM) follow-up of a gravitational-wave (GW) event requires scanning a wide sky region, defined by the so-called "skymap," to detect and…”
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Gamma-Ray Bursts: New Rulers to Measure the Universe by Ghirlanda, Giancarlo, Ghisellini, Gabriele, Lazzati, Davide, Firmani, Claudio

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On the 2007 July flare of the blazar 3C 454.3 by Ghisellini, Gabriele, Foschini, Luigi, Tavecchio, Fabrizio, Pian, Elena

“…In 2007 July, the blazar 3C 454.3 underwent a flare in the optical, reaching R∼ 13 on July 19. Then the optical flux decreased by one magnitude, being R∼ 14…”
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Constraints on the Physical Parameters of TeV Blazars by Tavecchio, Fabrizio, Maraschi, Laura, Ghisellini, Gabriele

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3C 66B as a TeV radio galaxy by Tavecchio, Fabrizio, Ghisellini, Gabriele

“…The Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) Telescope collaboration reported the detection of a new very high energy source, MAGIC J0223+430,…”
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Probing the existence of the Epeak–Eiso correlation in long gamma ray bursts by Ghirlanda, Giancarlo, Ghisellini, Gabriele, Firmani, Claudio

“…We probe the existence of the Epeak–Eiso correlation in long gamma-ray bursts (GRBs) using a sample of 442 BATSE bursts with known Epeak and with redshift…”
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Constraints on the emission mechanisms of gamma-ray bursts by Ghisellini, Gabriele, Celotti, Annalisa, Lazzati, Davide

“…If the emission of gamma-ray bursts were as a result of the synchrotron process in the standard internal shock scenario, then the typical observed spectrum…”
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Compton drag as a mechanism for very high linear polarization in gamma-ray bursts by Lazzati, Davide, Rossi, Elena, Ghisellini, Gabriele, Rees, Martin J.

“…The recent claim by Coburn & Boggs to have detected a very high degree of linear polarization in the prompt emission of GRB 021206 has stimulated interest in…”
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Formation Rate, Evolving Luminosity Function, Jet Structure, and Progenitors for Long Gamma-Ray Bursts by Firmani, Claudio, Avila-Reese, Vladimir, Ghisellini, Gabriele, Tutukov, Alexander V

“…We constrain the isotropic luminosity function (LF) and formation rate of long gamma-ray bursts (GRBs) by fitting models jointly to both the observed…”
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Quasi-thermal Comptonization and Gamma-Ray Bursts by Ghisellini, Gabriele, Celotti, Annalisa

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On the role of extinction in failed gamma-ray burst optical/infrared afterglows by Lazzati, Davide, Covino, Stefano, Ghisellini, Gabriele

“…While all but one of the gamma-ray bursts observed in the X-ray band showed an X-ray afterglow, about 60 per cent of them have not been detected in the optical…”
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BeppoSAX Observations of Unprecedented Synchrotron Activity in the BL Lacertae Object Markarian 501 by Pian, Elena, Vacanti, Giuseppe, Tagliaferri, Gianpiero, Ghisellini, Gabriele, Maraschi, Laura, Treves, Aldo, Urry, C. Megan, Fiore, Fabrizio, Giommi, Paolo, Palazzi, Eliana, Chiappetti, Lucio, Sambruna, Rita M

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X-Ray Variability and Correlations in the Two-Phase Disk-Corona Model for Seyfert Galaxies by Haardt, Francesco, Maraschi , Laura, Ghisellini, Gabriele

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Blazar jets as the most efficient persistent engines by Ghisellini, Gabriele

“…We have not identified for sure what is the mechanism launching, accelerating, and collimating relativistic jets. The two most likely possibilities are the…”
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