92 citations · 553 across the 58 of their papers we have counts for
11 papers · 1 filter
The deepest X-ray view of a kiloparsec scale jet at z=6.1
Fabio A. Meanti, Luca Ighina, Alberto Moretti +7
The mechanism responsible for the high-energy emission observed in kiloparsec-scale jets across cosmic time remains poorly understood. The relativistic jet associated with the z=6.…
Rapid radio variability in the blazar VLASS J04100139: Indication of a hidden population of weak radio jets at Cosmic Dawn
Silvia Belladitta, Eduardo Bañados, Anniek J. Gloudemans +7
Doppler boosting allows blazars to be detected out to high-, making them promising probes of the intergalactic medium through the 21 cm forest. We report 0.14411 GHz observat…
The Radio--X-ray Correlation of High-Redshift AGN: A Numerical Study of Inverse-Compton Scattering of the CMB Photons in Relativistic Jets
Aditya Sharma, Bhargav Vaidya, Silvia Belladitta +5
Relativistic jets from active galactic nuclei are expected to exhibit strong redshift evolution in their radiative output due to the increasing energy density of the cosmic microwa…
BLAZ4R and the eROSITA view of z>4 blazars
Tullia Sbarrato, Silvia Belladitta, Julien Wolf +8
We present BLAZ4R, the first living catalog of confirmed blazars, with a focus on the contribution of eROSITA, on board of the Spectrum Roentgen Gamma (SRG) spacecraft. Blaza…
BlazEr1: The eROSITA Blazar Catalog. Blazars and Blazar Candidates in the First eROSITA Survey
S. Haemmerich, A. Gokus, F. McBride +28
Aims. eROSITA, on board the Spectrum Roentgen Gamma (SRG) spacecraft, performed its first X-ray all-sky survey (eRASS1) between December 2019 and June 2020. It detected about 93000…
NuSTAR observations of a varying-flux quasar in the Epoch of Reionization
Lea Marcotulli, Thomas Connor, Eduardo Bañados +13
With enough X-ray flux to be detected in a 160s scan by SRG/eROSITA, the quasar CFHQS J142952+544717 is, by far, the most luminous X-ray source known at . We pres…
Multi-scale VLBI observations of the candidate host galaxy of GRB 200716C
S. Giarratana, M. Giroletti, C. Spingola +3
We present the discovery and the subsequent follow up of radio emission from SDSS J130402.36293840.6 (J1304+2938), the candidate host galaxy of the gamma-ray burst GRB~200716C.…
The central engine of the highest redshift blazar
Silvia Belladitta, Alessandro Caccianiga, Alessandro Diana +8
We report on a LUCI/Large Binocular Telescope near-infrared (NIR) spectrum of PSO J030947.49+271757.31 (hereafter PSO J0309+27), the highest redshift blazar known to date (z6…
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…
Parsec-scale properties of the radio brightest jetted AGN at z > 6
C. Spingola, D. Dallacasa, S. Belladitta +4
We present Director's Discretionary Time multi-frequency observations obtained with the Jansky Very Large Array (VLA) and the Very Long Baseline Array (VLBA) of the blazar PSO J030…