The Astrophysical Journal Letters, 819:L8 (6pp), 2016 March 1 doi:10.3847/2041-8205/819/1/L8 © 2016. The American Astronomical Society. All rights reserved. DEJA VU ALL OVER AGAIN: THE REAPPEARANCE OF SUPERNOVA REFSDAL P. L. Kelly1, S. A. Rodney2,T.Treu3,25, L.-G. Strolger4, R. J. Foley5,6,S.W.Jha7, J. Selsing8, G. Brammer4, M. BradaČ9, S. B. Cenko10,11, O. Graur12,13, A. V. Filippenko1, J. Hjorth8, C. McCully14,15, A. Molino16,17, M. Nonino18, A. G. Riess4,19, K. B. Schmidt15,20, B. Tucker21, A. von der Linden22, B. J. Weiner23, and A. Zitrin24 1 Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA;
[email protected] 2 Department of Physics and Astronomy, University of South Carolina, 712 Main Street, Columbia, SC 29208, USA 3 Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA 4 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 5 Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green Street, Urbana, IL 61801, USA 6 Astronomy Department, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA 7 Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA 8 Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark 9 University of California Davis, 1 Shields Avenue, Davis, CA 95616, USA 10 Astrophysics Science Division, NASA Goddard Space Flight Center, MC 661, Greenbelt,