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The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints

J. GuyLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisM. SullivanDepartment of Physics (Astrophysics), University of Oxford, DWB, Keble Road, Oxford OX1 3RH, UKA. ConleyDepartment of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto ON M5S 3H4, CanadaN. RegnaultLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisP. AstierLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisC. BallandLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisS. BasaUniversité Paris CitéR. G. CarlbergDepartment of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto ON M5S 3H4, CanadaD. FouchezCPPM, CNRS-IN2P3 and Universit Aix-Marseille II, Case 907, 13288 Marseille Cedex 9, FranceD. HardinLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisI. HookDepartment of Physics (Astrophysics), University of Oxford, DWB, Keble Road, Oxford OX1 3RH, UKD. A. HowellDepartment of Physics, University of California, Santa Barbara, Broida Hall, Mail Code 9530, Santa Barbara, CA 93106-9530, USAR. PainLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisN. Palanque‐DelabrouilleCEA, Centre de Saclay, Irfu/SPP, 91191 Gif-sur-Yvette, FranceK. PerrettDepartment of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto ON M5S 3H4, CanadaC. J. PritchetDepartment of Physics and Astronomy, University of Victoria, PO Box 3055 STN CSC, Victoria BC V8T 1M8, CanadaJ. RichCEA, Centre de Saclay, Irfu/SPP, 91191 Gif-sur-Yvette, FranceV. Ruhlmann-KleiderCEA, Centre de Saclay, Irfu/SPP, 91191 Gif-sur-Yvette, FranceD. BalamDepartment of Physics and Astronomy, University of Victoria, PO Box 3055 STN CSC, Victoria BC V8T 1M8, CanadaS. BaumontLPSC, CNRS-IN2P3, 53 rue des Martyrs, 38026 Grenoble Cedex, FranceRichard S. EllisDepartment of Astrophysics, California Institute of Technology, MS 105-24, Pasadena, CA 91125, USAS. FabbroCENTRA-Centro M. de Astrofisica and Department of Physics, IST, Lisbon, PortugalH. K. FakhouriLBNL, 1 Cyclotron Rd, Berkeley, CA 94720, USAN. FourmanoitLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisS. González–GaitánAnglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia; CEA, Centre de Saclay, Irfu/SPP, 91191 Gif-sur-Yvette, France; CENTRA-Centro M. de Astrofisica and Department of Physics, IST, Lisbon, Portugal; CPPM, CNRS-IN2P3 and Université Aix-Marseille II, Case 907, 13288 Marseille Cedex 9, France; Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto ON M5S 3H4, Canada; Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309-0391, USA; Department of Astrophysics, California Institute of Technology, MS 105-24, Pasadena, CA 91125, USA; Department of Physics (Astrophysics), University of Oxford, DWB, Keble Road, Oxford OX1 3RH, UK; Department of Physics and Astronomy, University of Victoria, PO Box 3055 STN CSC, Victoria BC V8T 1M8, Canada; Department of Physics, University of California, Santa Barbara, Broida Hall, Mail Code 9530, Santa Barbara, CA 93106-9530, USA; INAF – Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio (RM), Italy; LBNL, 1 Cyclotron Rd, Berkeley, CA 94720, USA; LPNHE, CNRS/IN2P3, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, 4 place Jussieu, 75252 Paris Cedex 05, France; LPSC, CNRS-IN2P3, 53 rue des Martyrs, 38026 Grenoble Cedex, France; Las Cumbres Observatory Global Telescope Network, 6740 Cortona Dr., Suite 102,Goleta, CA 93117, USA; Network Information Operations, DRDC-Ottawa, 3701 Carling Avenue, Ottawa, ON, K1A 0Z4, Canada; Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy; Université Paris 11, 91405 Orsay, FranceM. L. GrahamDepartment of Physics and Astronomy, University of Victoria, PO Box 3055 STN CSC, Victoria BC V8T 1M8, CanadaE. Y. HsiaoLBNL, 1 Cyclotron Rd, Berkeley, CA 94720, USAT. KronborgLPNHE, CNRS/IN2P3, Universit Pierre et Marie Curie ParisC. LidmanAnglo-Australian Observatory, PO Box 296, Epping, NSW 1710, AustraliaA. MourãoCENTRA-Centro M. de Astrofisica and Department of Physics, IST, Lisbon, PortugalS. PerlmutterLBNL, 1 Cyclotron Rd, Berkeley, CA 94720, USAP. RipocheLPNHE, CNRS/IN2P3, Université Pierre et Marie Curie Paris 6, Université Denis Diderot Paris 7, 4 place Jussieu, 75252 Paris Cedex 05, FranceN. SuzukiLBNL, 1 Cyclotron Rd, Berkeley, CA 94720, USAE. S. WalkerDepartment of Physics (Astrophysics), University of Oxford, DWB, Keble Road, Oxford OX1 3RH, UK

2010en

ABI

Annotatsiya

Aims. We present photometric properties and distance measurements of 252 high redshift Type Ia supernovae (0.15 < z < 1.1) discovered during the first three years of the Supernova Legacy Survey (SNLS). These events were detected and their multi-colour 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 redshifts. Methods. Systematic uncertainties arising from light curve modeling are studied, making use of two techniques to derive the peak magnitude, shape and colour of the supernovae, and taking advantage of a precise calibration of the SNLS fields. Results. A flat CDM cosmological fit to 231 SNLS high redshift type Ia supernovae alone gives M = 0.211 0.034(stat) 0.069(sys). The dominant systematic uncertainty comes from uncertainties in the photometric calibration. Systematic uncertainties from light curve fitters come next with a total contribution of 0.026 on M . No clear evidence is found for a possible evolution of the slope () of the colour-luminosity relation with redshift.

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DOI: 10.1051/0004-6361/201014468

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