PS J2107−1611: A new wide-separation, quadruply imaged lensed quasar with flux ratio anomalies Frédéric Dux, Cameron Lemon, Frédéric Courbin, Dominique Sluse, Alain Smette, Timo Anguita and Favio Neira A&A, 679 (2023) L4 Published online: 03 November 2023 DOI: 10.1051/0004-6361/202348227