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Updated: Apr 16, 2026

Demonstration of a Hyperlens-integrated Microscope and Super-resolution Imaging
Published on: September 8, 2017
Astrophysics. Multiple images of a highly magnified supernova formed by an early-type cluster galaxy lens
Patrick L Kelly1, Steven A Rodney2, Tommaso Treu3
1Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA. pkelly@astro.berkeley.edu.
Abstract:
In 1964, Refsdal hypothesized that a supernova whose light traversed multiple paths around a strong gravitational lens could be used to measure the rate of cosmic expansion. We report the discovery of such a system. In Hubble Space Telescope imaging, we have found four images of a single supernova forming an Einstein cross configuration around a redshift z = 0.54 elliptical galaxy in the MACS J1149.6+2223 cluster. The cluster's gravitational potential also creates multiple images of the z = 1.49 spiral supernova host galaxy, and a future appearance of the supernova elsewhere in the cluster field is expected. The magnifications and staggered arrivals of the supernova images probe the cosmic expansion rate, as well as the distribution of matter in the galaxy and cluster lenses.
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