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Search for lensed supernovae behind the galaxy cluster Abell 1689
Tanja Petrushevska, unpublished conference contribution

Keywords: lensed supernovae, supernova rates, galaxy clusters, strong lensing
Published in RUNG: 26.01.2018; Views: 3019; Downloads: 0
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iPTF16geu: A multiply imaged, gravitationally lensed type Ia supernova
Ariel Goobar, Rahman Amanullah, S.R. Kulkarni, Tanja Petrushevska, 2017, original scientific article

Abstract: We report the discovery of a multiply-imaged gravitationally lensed Type Ia supernova, iPTF16geu, at redshift z = 0.409. This phenomenon could be iden- tified because the light from the stellar explosion was magnified more than fifty times by the curvature of space around matter in an intervening galaxy. We used high spatial resolution observations to resolve four images of the lensed supernova, approximately 0.300 from the center of the foreground galaxy. The observations probe a physical scale of ⇠1 kiloparsec, smaller than what is typical in other studies of extragalactic gravitational lensing. The large mag- nification and symmetric image configuration implies close alignment between the line-of-sight to the supernova and the lens. The relative magnifications of the four images provide evidence for sub-structures in the lensing galaxy.
Keywords: lensed supernova, strong lensing, galaxy lens, multiply-lensed supernova
Published in RUNG: 23.01.2018; Views: 3032; Downloads: 0
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