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  • 1707.04606v2

    Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/1538-4357/aad565

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The Discovery of a Gravitationally Lensed Supernova Ia at Redshift 2.22

Research output: Contribution to journalJournal article

Published
  • David Rubin
  • Brian Hayden
  • Xiaosheng Huang
  • Greg Aldering
  • Rahman Amanullah
  • Kyle Barbary
  • Kyle Boone
  • Mark Brodwin
  • Susana E. Deustua
  • Sam Dixon
  • Peter Eisenhardt
  • Andrew S. Fruchter
  • Anthony H. Gonzalez
  • Ariel Goobar
  • Ravi R. Gupta
  • M. James Jee
  • Alex G. Kim
  • Marek Kowalski
  • Chris E. Lidman
  • Eric Linder
  • Kyle Luther
  • Jakob Nordin
  • Reynald Pain
  • Saul Perlmutter
  • Zachary Raha
  • Mickael Rigault
  • Pilar Ruiz-Lapuente
  • Clare M. Saunders
  • Caroline Sofiatti
  • Anthony L. Spadafora
  • S. Adam Stanford
  • Daniel Stern
  • Nao Suzuki
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Article number65
<mark>Journal publication date</mark>15/10/2018
<mark>Journal</mark>The Astrophysical Journal
Issue number1
Volume866
Number of pages16
Publication statusPublished
Original languageEnglish

Abstract

We present the discovery and measurements of a gravitationally lensed supernova (SN) behind the galaxy cluster MOO J1014+0038. Based on multi-band Hubble Space Telescope and Very Large Telescope (VLT) photometry of the supernova, and VLT spectroscopy of the host galaxy, we find a 97.5% probability that this SN is a SN Ia, and a 2.5% chance of a CC SN. Our typing algorithm combines the shape and color of the light curve with the expected rates of each SN type in the host galaxy. With a redshift of 2.2216, this is the highest redshift SN Ia discovered with a spectroscopic host-galaxy redshift. A further distinguishing feature is that the lensing cluster, at redshift 1.23, is the most distant to date to have an amplified SN. The SN lies in the middle of the color and light-curve shape distributions found at lower redshift, disfavoring strong evolution to z = 2.22. We estimate an amplification due to gravitational lensing of 2.8+0.6-0.5 (1.10 +- 0.23 mag)---compatible with the value estimated from the weak-lensing-derived mass and the mass-concentration relation from LambdaCDM simulations---making it the most amplified SN Ia discovered behind a galaxy cluster.

Bibliographic note

This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/1538-4357/aad565