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

J. Guy; M. Sullivan; A. Conley; N. Regnault; P. Astier; C. Balland; S. Basa; R. G. Carlberg; D. Fouchez; D. Hardin; I. M. Hook; D. A. Howell; R. Pain; N. Palanque-Delabrouille; K. M. Perrett; C. J. Pritchet; J. Rich; V. Ruhlmann-Kleider; D. Balam; S. Baumont; R. S. Ellis; S. Fabbro; H. K. Fakhouri; N. Fourmanoit; S. González-Gaitán; M. L. Graham; E. Hsiao; T. Kronborg; C. Lidman; A. M. Mourao; S. Perlmutter; P. Ripoche; N. Suzuki; E. S. Walker

doi:10.1051/0004-6361/201014468

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

J. Guy^*, M. Sullivan, A. Conley, N. Regnault, P. Astier, C. Balland, S. Basa, R. G. Carlberg, D. Fouchez, D. Hardin, I. M. Hook, D. A. Howell, R. Pain, N. Palanque-Delabrouille, K. M. Perrett, C. J. Pritchet, J. Rich, V. Ruhlmann-Kleider, D. Balam, S. BaumontR. S. Ellis, S. Fabbro, H. K. Fakhouri, N. Fourmanoit, S. González-Gaitán, M. L. Graham, E. Hsiao, T. Kronborg, C. Lidman, A. M. Mourao, S. Perlmutter, P. Ripoche, N. Suzuki, E. S. Walker

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

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 ΛCDM cosmological fit to 231 SNLS high redshift type Ia supernovae alone gives ΩM = 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 ΩM. No clear evidence is found for a possible evolution of the slope (β) of the colour-luminosity relation with redshift.

Original language	English
Article number	A7
Journal	Astronomy and Astrophysics
Volume	523
Issue number	1
DOIs	https://doi.org/10.1051/0004-6361/201014468
Publication status	Published - 10 Nov 2010
Externally published	Yes

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Guy, J., Sullivan, M., Conley, A., Regnault, N., Astier, P., Balland, C., Basa, S., Carlberg, R. G., Fouchez, D., Hardin, D., Hook, I. M., Howell, D. A., Pain, R., Palanque-Delabrouille, N., Perrett, K. M., Pritchet, C. J., Rich, J., Ruhlmann-Kleider, V., Balam, D., ... Walker, E. S. (2010). The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints. Astronomy and Astrophysics, 523(1), Article A7. https://doi.org/10.1051/0004-6361/201014468

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

abstract = "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 ΛCDM cosmological fit to 231 SNLS high redshift type Ia supernovae alone gives ΩM = 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 ΩM. No clear evidence is found for a possible evolution of the slope (β) of the colour-luminosity relation with redshift.",

keywords = "cosmology: observations, supernovae: general",

author = "J. Guy and M. Sullivan and A. Conley and N. Regnault and P. Astier and C. Balland and S. Basa and Carlberg, {R. G.} and D. Fouchez and D. Hardin and Hook, {I. M.} and Howell, {D. A.} and R. Pain and N. Palanque-Delabrouille and Perrett, {K. M.} and Pritchet, {C. J.} and J. Rich and V. Ruhlmann-Kleider and D. Balam and S. Baumont and Ellis, {R. S.} and S. Fabbro and Fakhouri, {H. K.} and N. Fourmanoit and S. Gonz{\'a}lez-Gait{\'a}n and Graham, {M. L.} and E. Hsiao and T. Kronborg and C. Lidman and Mourao, {A. M.} and S. Perlmutter and P. Ripoche and N. Suzuki and Walker, {E. S.}",

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doi = "10.1051/0004-6361/201014468",

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Guy, J, Sullivan, M, Conley, A, Regnault, N, Astier, P, Balland, C, Basa, S, Carlberg, RG, Fouchez, D, Hardin, D, Hook, IM, Howell, DA, Pain, R, Palanque-Delabrouille, N, Perrett, KM, Pritchet, CJ, Rich, J, Ruhlmann-Kleider, V, Balam, D, Baumont, S, Ellis, RS, Fabbro, S, Fakhouri, HK, Fourmanoit, N, González-Gaitán, S, Graham, ML, Hsiao, E, Kronborg, T, Lidman, C, Mourao, AM, Perlmutter, S, Ripoche, P, Suzuki, N & Walker, ES 2010, 'The Supernova Legacy Survey 3-year sample: Type Ia supernovae photometric distances and cosmological constraints', Astronomy and Astrophysics, vol. 523, no. 1, A7. https://doi.org/10.1051/0004-6361/201014468

TY - JOUR

T1 - The Supernova Legacy Survey 3-year sample

T2 - Type Ia supernovae photometric distances and cosmological constraints

AU - Guy, J.

AU - Sullivan, M.

AU - Conley, A.

AU - Regnault, N.

AU - Astier, P.

AU - Balland, C.

AU - Basa, S.

AU - Carlberg, R. G.

AU - Fouchez, D.

AU - Hardin, D.

AU - Hook, I. M.

AU - Howell, D. A.

AU - Pain, R.

AU - Palanque-Delabrouille, N.

AU - Perrett, K. M.

AU - Pritchet, C. J.

AU - Rich, J.

AU - Ruhlmann-Kleider, V.

AU - Balam, D.

AU - Baumont, S.

AU - Ellis, R. S.

AU - Fabbro, S.

AU - Fakhouri, H. K.

AU - Fourmanoit, N.

AU - González-Gaitán, S.

AU - Graham, M. L.

AU - Hsiao, E.

AU - Kronborg, T.

AU - Lidman, C.

AU - Mourao, A. M.

AU - Perlmutter, S.

AU - Ripoche, P.

AU - Suzuki, N.

AU - Walker, E. S.

PY - 2010/11/10

Y1 - 2010/11/10

N2 - 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 ΛCDM cosmological fit to 231 SNLS high redshift type Ia supernovae alone gives ΩM = 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 ΩM. No clear evidence is found for a possible evolution of the slope (β) of the colour-luminosity relation with redshift.

AB - 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 ΛCDM cosmological fit to 231 SNLS high redshift type Ia supernovae alone gives ΩM = 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 ΩM. No clear evidence is found for a possible evolution of the slope (β) of the colour-luminosity relation with redshift.

KW - cosmology: observations

KW - supernovae: general

UR - http://www.scopus.com/inward/record.url?scp=78149429165&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201014468

DO - 10.1051/0004-6361/201014468

M3 - Article

AN - SCOPUS:78149429165

SN - 0004-6361

VL - 523

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 1

M1 - A7

ER -

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

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