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Deja Vu All Over Again: The Reappearance of Supernova RefsdalIn Hubble Space Telescope (HST) imaging taken on 2014 November 10, four images of supernova (SN) Refsdal(redshift z1.49) appeared in an Einstein-cross-like configuration (images S1S4) around an early-type galaxy in the cluster MACS J1149.5+2223 (z0.54). Almost all lens models of the cluster have predicted that the SN should reappear within a year in a second host-galaxy image created by the clusters potential. In HST observations taken on 2015 December 11, we find a new source at the predicted position of the new image of SN Refsdal approximately 8 from the previous images S1S4. This marks the first time the appearance of a SN at a particular time and location in the sky was successfully predicted in advance! We use these data and the light curve from the first four observed images of SN Refsdal to place constraints on the relative time delay and magnification of the new image (SX) compared to images S1S4. This enables us, for the first time, to test blind lens model predictions of both magnifications and time delays for a lensed SN. We find that the timing and brightness of the new image are consistent with the blind predictions of a fraction of the models. The reappearance illustrates the discriminatory power of this blind test and its utility to uncover sources of systematic uncertainty. From planned HST photometry, we expect to reach a precision of 12 on the time delay between S1S4 and SX.
Document ID
20170003353
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Kelly, P.L.
(California Univ. Berkeley, CA, United States)
Rodney, S.A.
(South Carolina Univ. Columbia, SC, United States)
Treu, T.
(California Univ. Los Angeles, CA, United States)
Strolger, L.-G.
(Space Telescope Science Inst. Baltimore, MD, United States)
Foley, R.J.
(Illinois Univ. Urbana-Champaign, IL, United States)
Jha, S.W.
(State Univ. of New Jersey Piscataway, NJ, United States)
Selsing, J.
(Copenhagen Univ. Denmark)
Brammer, G.
(Space Telescope Science Inst. Baltimore, MD, United States)
Bradac, M.
(California Univ. Davis, CA, United States)
Cenko, S. B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
April 11, 2017
Publication Date
February 24, 2016
Publication Information
Publication: The Astrophysical Journal Letters
Publisher: The American Astronomical Society
Volume: 819
Issue: 1
ISSN: 2041-8205
e-ISSN: 2041-8213
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN41506
Funding Number(s)
CONTRACT_GRANT: GO-13386
CONTRACT_GRANT: RSA 1508337
CONTRACT_GRANT: GO-13459
CONTRACT_GRANT: NSF AST-1211916
CONTRACT_GRANT: GO-14041
CONTRACT_GRANT: RSA 1520634
CONTRACT_GRANT: NAS 5-26555
CONTRACT_GRANT: NSF 0847157
CONTRACT_GRANT: NSF AST-1518052
Distribution Limits
Public
Copyright
Other
Keywords
galaxies: clusters: general – galaxies: individual (MACS J1149.5+2223) – gra

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