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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…
NuSTAR and multifrequency study of the two high-redshift blazars S5 0836+710 and PKS 2149-306
G. Tagliaferri, G. Ghisellini, M. Perri +15
The most powerful blazars are the flat spectrum radio quasars whose emission is dominated by a Compton component peaking between a few hundred keV and a few hundred MeV. We selecte…
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…
An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?
Giacomo Bonnoli, Fabrizio Tavecchio, Gabriele Ghisellini +1
High energy observations of extreme BL Lac objects, such as 1ES 0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the e…