Home Research High Energy Astrophysics Publications Publications of A. Schweinfurth All genres Journal Article (1) Journal Article (1) 1. Journal Article Dux, F.; Millon, M.; Lemon, C.; Schmidt, T.; Courbin, F.; Shajib, A. J.; Treu, T.; Birrer, S.; Wong, K. C.; Agnello, A. et al.; Andrade, A.; Galan, A.; Hjorth, J.; Paic, E.; Schuldt, S.; Schweinfurth, A.; Sluse, D.; Smette, A.; Suyu, S. H.: J1721+8842: The first Einstein zigzag lens. ASTRONOMY & ASTROPHYSICS 694, A300 (2025) MPG.PuRe DOI