489 citations · 1.3k across the 44 of their papers we have counts for
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astro-ph.HE2021★ 1 cited
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…
astro-ph.GA2021★ 11 cited
X-ray obscuration from a variable ionized absorber in PG 1114+445
R. Serafinelli, V. Braito, P. Severgnini +9
Photoionized absorbers of outflowing gas are commonly found in the X-ray spectra of active galactic nuclei (AGN). While most of these absorbers are seldom significantly variable, s…