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={P. Astier and J. Guy and N. Regnault and R. Pain and E. Aubourg and D. Balam and S. Basa and R. Carlberg and S. Fabbro and D. Fouchez and I. Hook and D. Howell and H. Lafoux and J. Neill and N. Palanque-Delabrouille and K. Perrett and C. Pritchet and J. Rich and M. Sullivan and R. Taillet and G. Aldering and P. Antilogus and V. Arsenijevi{\'c} and C. Balland and S. Baumont and J. Bronder and H. Courtois and R. Ellis and M. Filiol and A. Gonçalves and A. Goobar and D. Guide and D. Hardin and V. Lusset and C. Lidman and R. McMahon and M. Mouchet and A. Mour{\~a}o and S. Perlmutter and P. Ripoche and C. Tao and N. 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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