%0 Generic %1 Astier2005 %A Astier, P. %A Guy, J. %A Regnault, N. %A Pain, R. %A Aubourg, E. %A Balam, D. %A Basa, S. %A Carlberg, R. G. %A Fabbro, S. %A Fouchez, D. %A Hook, I. M. %A Howell, D. A. %A Lafoux, H. %A Neill, J. D. %A Palanque-Delabrouille, N. %A Perrett, K. %A Pritchet, C. J. %A Rich, J. %A Sullivan, M. %A Taillet, R. %A Aldering, G. %A Antilogus, P. %A Arsenijevic, V. %A Balland, C. %A Baumont, S. %A Bronder, J. %A Courtois, H. %A Ellis, R. S. %A Filiol, M. %A Goncalves, A. C. %A Goobar, A. %A Guide, D. %A Hardin, D. %A Lusset, V. %A Lidman, C. %A McMahon, R. %A Mouchet, M. %A Mourao, A. %A Perlmutter, S. %A Ripoche, P. %A Tao, C. %A Walton, N. %D 2005 %K Distance Luminosity Redshift Supernovae Survey %T The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set %U http://arxiv.org/abs/astro-ph/0510447 %X 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 measure their redshift. With this data set, we have built a Hubble diagram extending to z=1, with all distance measurements involving at least two bands. Systematic uncertainties are evaluated making use of the multi-band photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results : Omega_M = 0.263 +/- 0.042(stat) +/- 0.032(sys) for a flat LambdaCDM model; and w = -1.023 +/- 0.090(stat) +/- 0.054(sys) for a flat cosmology with constant equation of state w when combined with the constraint from the recent Sloan Digital Sky Survey measurement of baryon acoustic oscillations.

@misc{Astier2005, abstract = { 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 measure their redshift. With this data set, we have built a Hubble diagram extending to z=1, with all distance measurements involving at least two bands. Systematic uncertainties are evaluated making use of the multi-band photometry obtained at CFHT. Cosmological fits to this first year SNLS Hubble diagram give the following results : Omega_M = 0.263 +/- 0.042(stat) +/- 0.032(sys) for a flat LambdaCDM model; and w = -1.023 +/- 0.090(stat) +/- 0.054(sys) for a flat cosmology with constant equation of state w when combined with the constraint from the recent Sloan Digital Sky Survey measurement of baryon acoustic oscillations. }, added-at = {2010-03-09T16:13:40.000+0100}, author = {{Astier}, P. and {Guy}, J. and {Regnault}, N. and Pain, R. and Aubourg, E. and Balam, D. and Basa, S. and Carlberg, R. G. and Fabbro, S. and Fouchez, D. and Hook, I. M. and Howell, D. A. and Lafoux, H. and Neill, J. D. and Palanque-Delabrouille, N. and Perrett, K. and Pritchet, C. J. and Rich, J. and Sullivan, M. and Taillet, R. and Aldering, G. and Antilogus, P. and Arsenijevic, V. and Balland, C. and Baumont, S. and Bronder, J. and Courtois, H. and Ellis, R. S. and Filiol, M. and Goncalves, A. C. and Goobar, A. and Guide, D. and Hardin, D. and Lusset, V. and Lidman, C. and McMahon, R. and Mouchet, M. and Mourao, A. and Perlmutter, S. and Ripoche, P. and Tao, C. and Walton, N.}, biburl = {https://www.bibsonomy.org/bibtex/2cad0694b2039261aea739cdb132a4a60/ad4}, description = {[astro-ph/0510447] The Supernova Legacy Survey: Measurement of Omega_M, Omega_Lambda and w from the First Year Data Set}, interhash = {abd336d3d19940c43cb0416b06c6ffff}, intrahash = {cad0694b2039261aea739cdb132a4a60}, keywords = {Distance Luminosity Redshift Supernovae Survey}, note = {cite arxiv:astro-ph/0510447 Comment: (The SNLS Collaboration) 24 pages, 13 figures, Accepted in A&A. Computer readable tables at http://snls.in2p3.fr/conf/papers/cosmo1/}, timestamp = {2010-03-09T16:13:40.000+0100}, title = {{T}he {S}upernova {L}egacy {S}urvey: {M}easurement of {O}mega_{M}, {O}mega_{L}ambda and w from the {F}irst {Y}ear {D}ata {S}et}, url = {http://arxiv.org/abs/astro-ph/0510447}, year = 2005 }