92 citations · 553 across the 58 of their papers we have counts for
4 papers · 1 filter
Direct observation of an extended X-ray jet at =6.1
L. Ighina, A. Moretti, F. Tavecchio +6
We report on the direct observation of an extended X-ray jet in the =6.1 radio-loud Active Galactic Nucleus PSO J030947.49+271757.31 from a deep Chandra X-ray observation (128 k…
Minute-timescale variability in the X-ray emission of the highest redshift blazar
Alberto Moretti, Gabriele Ghisellini, Alessandro Caccianiga +9
We report on two Chandra observations of the quasar PSO J0309+27, the most distant blazar observed so far (z=6.1), performed eight months apart, in March and November 2020. Previou…
The Impact of the CMB on the Evolution of high-z Blazars
L. Ighina, A. Caccianiga, A. Moretti +3
Different works have recently found an increase of the average X-ray-to-radio luminosity ratio with redshift in the blazar population. We evaluate here whether the inverse Compton…
Radio Detection of VIK J23183113, the Most Distant Radio-Loud Quasar (=6.44)
L. Ighina, S. Belladitta, A. Caccianiga +4
We report the 888 MHz radio detection in the Rapid ASKAP Continuum Survey (RACS) of VIK J23183113, a =6.44 quasar. Its radio luminosity (1.2 W Hz at 5…