Discovery of the Most Ultra-Luminous QSO Using <i>GAIA</i>, SkyMapper, and WISE
Discovery of the Most Ultra-Luminous QSO Using <i>GAIA</i>, SkyMapper, and WISE
Abstract We report the discovery of the ultra-luminous quasi-stellar object SMSS J215728.21−360215.1 with magnitude z = 16.9 and W4 = 7.42 at redshift 4.75. Given absolute magnitudes of M 145, AB = −29.3, M 300, AB = −30.12, and log L bol / L bol, ⊙ = 14.84, it is …