Authors
MEA Betoule, R Kessler, J Guy, J Mosher, D Hardin, R Biswas, P Astier, P El-Hage, M Konig, S Kuhlmann, J Marriner, R Pain, N Regnault, C Balland, BA Bassett, PJ Brown, H Campbell, RG Carlberg, F Cellier-Holzem, D Cinabro, A Conley, CB D’andrea, DL DePoy, M Doi, RS Ellis, S Fabbro, AV Filippenko, RJ Foley, JA Frieman, D Fouchez, L Galbany, A Goobar, RR Gupta, GJ Hill, R Hlozek, CJ Hogan, IM Hook, DA Howell, SW Jha, L Le Guillou, G Leloudas, C Lidman, JL Marshall, A Möller, AM Mourão, J Neveu, R Nichol, MD Olmstead, N Palanque-Delabrouille, S Perlmutter, JL Prieto, CJ Pritchet, M Richmond, AG Riess, V Ruhlmann-Kleider, M Sako, K Schahmaneche, DP Schneider, M Smith, J Sollerman, M Sullivan, NA Walton, CJ Wheeler
Publication date
2014/8/1
Journal
Astronomy & Astrophysics
Volume
568
Pages
A22
Publisher
EDP Sciences
Description
Aims
We present cosmological constraints from a joint analysis of type Ia supernova (SN Ia) observations obtained by the SDSS-II and SNLS collaborations. The dataset includes several low-redshift samples (z< 0.1), all three seasons from the SDSS-II (0.05 <z< 0.4), and three years from SNLS (0.2 <z< 1), and it totals 740 spectroscopically confirmed type Ia supernovae with high-quality light curves.
Methods
We followed the methods and assumptions of the SNLS three-year data analysis except for the following important improvements: 1) the addition of the full SDSS-II spectroscopically-confirmed SN Ia sample in both the training of the SALT2 light-curve model and in the Hubble diagram analysis (374 SNe); 2) intercalibration of the SNLS and SDSS surveys and reduced systematic uncertainties in the photometric calibration, performed blindly with respect to the cosmology analysis; and 3) a thorough investigation of …
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MEA Betoule, R Kessler, J Guy, J Mosher, D Hardin… - Astronomy & Astrophysics, 2014