X-ray observation of ULAS J1120+0641, the most distant quasar at z = 7.08 A. Moretti, L. Ballo, V. Braito, A. Caccianiga, R. Della Ceca, R. Gilli, R. Salvaterra, P. Severgnini and C. Vignali A&A, 563 (2014) A46 Published online: 05 March 2014 DOI: 10.1051/0004-6361/201323051