Chandra and Magellan/FIRE follow-up observations of PSO167-13: An X-ray weak QSO at z=6.515

Vito, F; Brandt, WN; Ricci, F; Congiu, E; Connor, T; Banados, E; Bauer, FE; Gilli, R; Luo, B; Mazzucchelli, C; Mignoli, M; Shemmer, O; Vignali, C; Calura, F; Comastri, A; Decarli, R; Gallerani, S; Nanni, R; Brusa, M; Cappelluti, N; Civano, F; Zamorani, G

Vito, F (corresponding author), Scuola Normale Super Pisa, Piazza Cavalieri 7, I-56126 Pisa, Italy.; Vito, F (corresponding author), Pontificia Univ Catolica Chile, Fac Fs, Inst Astrofs, Casilla 306, Santiago 22, Chile.; Vito, F (corresponding author), Pontificia Univ Catolica Chile, Fac Fs, Ctr Astroingn, Casilla 306, Santiago 22, Chile.

ASTRONOMY & ASTROPHYSICS, 2021; 649 ():

Abstract

Context. The discovery of hundreds of quasi-stellar objects (QSOs) in the first gigayear of the Universe powered by already grown supermassive black h......

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