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18 April 2024

» arxiv » 1411.6009

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Multiple Images of a Highly Magnified Supernova Formed by an Early-Type Cluster Galaxy Lens
Patrick L. Kelly ; Steven A. Rodney ; Tommaso Treu ; Ryan J. Foley ; Gabriel Brammer ; Kasper B. Schmidt ; Adi Zitrin ; Alessandro Sonnenfeld ; Louis-Gregory Strolger ; Or Graur ; Alexei V. Filippenko ; Saurabh W. Jha ; Adam G. Riess ; Marusa Bradac ; Benjamin J. Weiner ; Daniel Scolnic ; Matthew A. Malkan ; Anja von der Linden ; Michele Trenti ; Jens Hjorth ; Raphael Gavazzi ; Adriano Fontana ; Julian Merten ; Curtis McCully ; Tucker Jones ; Marc Postman ; Alan Dressler ; Brandon Patel ; S. Bradley Cenko ; Melissa L. Graham ; Bradley E. Tucker ;
Date:	21 Nov 2014
Abstract:	We report the discovery of the first multiply-imaged gravitationally-lensed supernova. The four images form an Einstein cross with over 2" diameter around a z=0.544 elliptical galaxy that is a member of the cluster MACSJ1149.6+2223. The supernova appeared in Hubble Space Telescope exposures taken on 3-20 November 2014 UT, as part of the Grism Lens-Amplified Survey from Space. The images of the supernova coincide with the strongly lensed arm of a spiral galaxy at z=1.491, which is itself multiply imaged by the cluster potential. A measurement of the time delays between the multiple images and their magnification will provide new unprecedented constraints on the distribution of luminous and dark matter in the lensing galaxy and in the cluster, as well as on the cosmic expansion rate.
Source:	arXiv, 1411.6009
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