Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
- Betoule, M.
- Kessler, R.
- Guy, J.
- Mosher, J.
- Hardin, D.
- Biswas, R.
- Astier, P.
- El-Hage, P.
- Konig, M.
- Kuhlmann, S.
- Marriner, J.
- Pain, R.
- Regnault, N.
- Balland, C.
- Bassett, B. A.
- Brown, P. J.
- Campbell, H.
- Carlberg, R. G.
- Cellier-Holzern, F.
- Cinabro, D.
- Conley, A.
- D'Andrea, C. B.
- DePoy, D. L.
- Doi, M.
- Ellis, R. S.
- Fabbro, S.
- Filippenko, A. V.
- Foley, R. J.
- Frieman, J. A.
- Fouchez, D.
- Galbany, L.
- Goobar, A.
- Gupta, R. R.
- Hill, G. J.
- Hlozek, R.
- Hogan, C. J.
- Hook, I. M.
- Howell, D. A.
- Jha, S. W.
- Le Guillou, L.
- Leloudas, G.
- Lidrnan, C.
- Marshall, J. L.
- Moeller, A.
- Mourao, A. M.
- Neveu, J.
- Nichol, R.
- Olmstead, M. D.
- Palanque-Delabrouille, N.
- Perlinutter, S.
- Prieto, J. L.
- Pritchet, C. J.
- Richinond, M.
- Riess, A. G.
- Ruhlmann-Kleider, V.
- Sako, M.
- Sehahmaneche, K.
- Schneider, D. P.
- Smith, M.
- Sollerman, J.
- Sullivan, M.
- Walton, N. A.
- Wheeler, C. J.
DOIAbstract
Aims. We present cosmological constraints from a joint analysis of type la 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-11 (0.05 <z <0.4), and three years from SNLS (0.2 <z <1), and it totals 740 spectroscopically confirmed type la 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: I) the addition of the full SDSS-II spectroscopically-confirmed SN la 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 SD...
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