Cameron Lemon Stockholm University Adriano Agnello Science and Technology Facilities Council (STFC) Matthew Auger University of Cambridge Simon Birrer State University of New York at Stony Brook James Hung-Hsu Chan American Museum of Natural History Geoff Chih-Fan Chen University of California - Los Angeles Frederic Courbin Universitat de Barcelona Christopher Fassnacht University of California - Davis Aymeric Galan University of Geneva, Department of Astronomy Martin Millon University of Geneva, Department of Astronomy Cristian Eduard Rusu National Astronomical Obs of Japan (NAOJ), Subaru Telescope Anowar J Shajib University of Chicago Dominique Sluse Universite de Liege Sherry H. Suyu Technical University of Munich Tommaso L. Treu University of California - Los Angeles Kenneth Wong University of Tokyo Akin Yildirim Max Planck Institute for Astrophysics