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Strauss, Nanako Kato, Naoko Asami, Naoshi Sugiyama, Nobunari Kashikawa, Paul A. Price, Philip J. Tait, Robert H. Lupton, Satoshi Kikuta, Satoshi Miyazaki, Shiang-Yu Wang, Shuhei Koyama, Tadafumi Takata, Takeo Minezaki, Takuji Yamashita, Takuma Izumi, Tohru Nagao, Tomotsugu Goto, Toshihiro Kawaguchi, Yoshiaki Ono, Yoshiki Matsuoka, Yoshiki Toba, Yousuke Utsumi, Yuichi Harikane, Yutaka Komiyama","submitted_at":"2019-01-29T19:00:02Z","abstract_excerpt":"We report the discovery of a quasar at z = 7.07, which was selected from the deep multi-band imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. This quasar, HSC J124353.93+010038.5, has an order of magnitude lower luminosity than do the other known quasars at z > 7. The rest-frame ultraviolet absolute magnitude is M1450 = -24.13 +/- 0.08 mag and the bolometric luminosity is Lbol = (1.4 +/- 0.1) x 10^{46} erg/s. 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