The Supernova Legacy Survey: measurement of $\Omega_{\mathsf{M}}$, $\Omega_\mathsf{\Lambda}$ and w from the first year data set

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, as part of the CFHT Legacy Survey (CFHTLS). Follow-up spectroscopy was performed at the VLT, Gemini and Keck telescopes to confirm the nature of the supernovae and to measure their redshift. With this data set, we have built a Hubble diagram extending to , with all distance measurements involving at least two bands. Systematic uncertainties…

• NS
  National Science Foundation
• UD
  U.S. Department of Energy
• CI
  California Institute of Technology
• CN
  Consejo Nacional de Investigaciones Científicas y Técnicas
• CN
  Conselho Nacional de Desenvolvimento Científico e Tecnológico
• ES
  European Southern Observatory
• CN
  Centre National de la Recherche Scientifique

  Award: CNRS/IN2P3
• OO
  Office of Science
• FF
  France-Berkeley Fund
• NS
  Natural Sciences and Engineering Research Council of Canada
• AR
  Australian Research Council
• FP
  Fundação para a Ciência e a Tecnologia
• CN
  Comisión Nacional de Investigación Científica y Tecnológica
• IN
  Institut national des sciences de l'Univers

  Award: IN2P3
• IN
  Institut National de Physique Nucléaire et de Physique des Particules

  Award: CNRS/IN2P3
• NP
  Nuclear Physics