455 citations · 2.9k across the 55 of their papers we have counts for
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Bulk Comptonization spectra in blazars
Annalisa Celotti, Gabriele Ghisellini, Andrew C. Fabian
We study the time dependent spectra produced via the bulk Compton process by a cold, relativistic shell of plasma moving (and accelerating) along the jet of a blazar, scattering on…
Dissipation of jet bulk kinetic energy in powerful blazars
K. Katarzynski, G. Ghisellini
We investigate the dissipation of the bulk kinetic energy of a relativistic jet at different distances from the central power--house and analyse in detail how the dissipated energy…
Discovery of a tight correlation among the prompt emission properties of long Gamma Ray Bursts
C. Firmani, G. Ghisellini, V. Avila-Reese +1
We report the discovery of a correlation among three prompt emission properties of GRBs. These are the isotropic peak luminosity L_iso, the peak energy of the time-integrated promp…
Are GRB 980425 and GRB 031203 real outliers or twins of GRB 060218?
G. Ghisellini, G. Ghirlanda, S. Mereghetti +3
GRB 980425 and GRB 031203 are apparently two outliers with respect to the correlation between the isotropic equivalent energy E_iso emitted in the prompt radiation phase and the pe…
The Hubble diagram extended to z>>1: the gamma-ray properties of GRBs confirm the Lambda-CDM model
C. Firmani, V. Avila-Reese, G. Ghisellini +1
Tight constraints on cosmological parameters can be obtained with standard candles spanning a range of redshifts as large as possible. We propose to treat SN Ia and long Gamma-Ray…
XMM-Newton observations of a sample of gamma-ray loud active galactic nuclei
L. Foschini, G. Ghisellini, C. M. Raiteri +7
(abridged) We performed a homogeneous and systematic analysis of simultaneous X-ray and optical/UV properties of a group of 15 gamma-ray loud AGN, using observations performed with…