The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda,and w from the First Year Data Set

  title={The Supernova Legacy Survey: Measurement of Omega\_M, Omega\_Lambda,and w from the First Year Data Set},
  author={Pierre Astier and J. G. V. Guy and Nicolas Regnault and R. Pain and Eric Aubourg and David D. Balam and St{\'e}phane Basa and Raymond G. Carlberg and S{\'e}bastien Fabbro and Dominique Fouchez and Isobel M. Hook and D. Andrew Howell and Herv{\'e} Lafoux and James D. Neill and Nathalie Palanque-Delabrouille and Kathy Perrett and C. Pritchet and Joshua Rich and M. Sullivan and Richard Taillet and Greg Aldering and P. Antilogus and Vladimir Arsenijevi{\'c} and Christophe Balland and Sylvain Baumont and J. Bronder and H{\'e}l{\`e}ne M. Courtois and Richard S. Ellis and M. Filiol and Anabela C. Gonçalves and Ariel Goobar and Deng Guide and Douglas P. Hardin and Vincent Lusset and Christopher E. Lidman and Richard McMahon and Martine Mouchet and Ana M. Mour{\~a}o and Steve I. Perlmutter and P. Ripoche and Charling Tao and Nicholas A. Walton},
  journal={Astronomy and Astrophysics},
We present distance measurements to 71 high redshift type Ia supernovae discovered during the first year of the 5-year Supernova Legacy Survey (SNLS). These events were detected and their multi-color light-curves measured using the MegaPrime/MegaCam instrument at the Canada-France-Hawaii Telescope (CFHT), by repeatedly imaging four one-square degree fields in four bands. Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to… Expand
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