593 citations · 6.9k across the 112 of their papers we have counts for
5 papers · 1 filter
Extremes of the jet-accretion power relation of blazars, as explored by NuSTAR
T. Sbarrato, G. Ghisellini, G. Tagliaferri +9
Hard X-ray observations are crucial to study the non-thermal jet emission from high-redshift, powerful blazars. We observed two bright z>2 flat spectrum radio quasars (FSRQs) in ha…
The high-redshift gamma-ray burst GRB140515A
A. Melandri, M. G. Bernardini, P. D'Avanzo +22
High-redshift gamma-ray bursts have several advantages for the study of the distant universe, providing unique information about the structure and properties of the galaxies in whi…
Swift for blazars
G. Ghisellini
I will review recent advances in the field of blazars, highlighting the contribution of Swift. Together with other operating satellites (most notably Fermi, but also AGILE, WISE, P…
Structure of Gamma-Ray Burst jets: intrinsic versus apparent properties
O. S. Salafia, G. Ghisellini, A. Pescalli +2
With this paper we introduce the concept of apparent structure of a GRB jet, as opposed to its intrinsic structure. The latter is customarily defined specifying the functions epsil…
SDSS J013127.34-032100.1: a candidate blazar with a 11 billion solar mass black hole at =5.18
G. Ghisellini, G. Tagliaferri, T. Sbarrato +1
The radio-loud quasar SDSS J013127.34-032100.1at a redshift z=5.18 is one of the most distant radio-loud objects. The radio to optical flux ratio (i.e. the radio-loudness) of the s…