Two Superluminous Supernovae from the Early Universe Discovered by the Supernova Legacy Survey

  title={Two Superluminous Supernovae from the Early Universe Discovered by the Supernova Legacy Survey},
  author={D. Andrew Howell and Daniel Kasen and Christopher E. Lidman and Mark Sullivan and Alex Conley and Pierre Astier and C. Carlberg and Dominique Fouchez and Julien Guy and Douglas P. Hardin and R. Pain and Nathalie Palanque-Delabrouille and Kathy Perrett and C. Pritchet and Nicolas Regnault and James Rich and Vanina Ruhlmann-Kleider},
  journal={The Astrophysical Journal},
We present spectra and light curves of SNLS 06D4eu and SNLS 07D2bv, two hydrogen-free superluminous supernovae (SNe) discovered by the Supernova Legacy Survey. At z = 1.588, SNLS 06D4eu is the highest redshift superluminous SN with a spectrum, at MU = –22.7 it is one of the most luminous SNe ever observed, and it gives a rare glimpse into the rest-frame ultraviolet where these SNe put out their peak energy. SNLS 07D2bv does not have a host galaxy redshift, but on the basis of the SN spectrum… 
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