The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set

P. Astier; J. Guy; N. Regnault; R. Pain; E. Aubourg; D. Balam; S. Basa; R. G. Carlberg; S. Fabbro; D. Fouchez; I. M. Hook; D. A. Howell; H. Lafoux; J. D. Neill; N. Palanque-Delabrouille; K. Perrett; C. J. Pritchet; J. Rich; M. Sullivan; R. Taillet; G. Aldering; P. Antilogus; V. Arsenijevic; C. Balland; S. Baumont; J. Bronder; H. Courtois; R. S. Ellis; M. Filiol; A. C. Gonçalves; A. Goobar; D. Guide; D. Hardin; V. Lusset; C. Lidman; R. McMahon; M. Mouchet; A. Mourao; S. Perlmutter; P. Ripoche; C. Tao; N. Walton

doi:10.1051/0004-6361:20054185

The Supernova Legacy Survey: measurement of Ω_M, Ω_Λ and w from the first year data set

P. Astier, J. Guy, N. Regnault, R. Pain, E. Aubourg, D. Balam, S. Basa, R. G. Carlberg, S. Fabbro, D. Fouchez, I. M. Hook, D. A. Howell, H. Lafoux, J. D. Neill, N. Palanque-Delabrouille, K. Perrett, C. J. Pritchet, J. Rich, M. Sullivan, R. TailletG. Aldering, P. Antilogus, V. Arsenijevic, C. Balland, S. Baumont, J. Bronder, H. Courtois, R. S. Ellis, M. Filiol, A. C. Gonçalves, A. Goobar, D. Guide, D. Hardin, V. Lusset, C. Lidman, R. McMahon, M. Mouchet, A. Mourao, S. Perlmutter, P. Ripoche, C. Tao, N. Walton

Research School of Astronomy & Astrophysics

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

2188 Citations (Scopus)

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, as part of the CFHT Legacy Survey (CFHTLS). 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: Ω_M= 0.263 ± 0.042 (stat) ± 0.032 (sys) for a flat ΛCDM 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.

Original language	English
Pages (from-to)	31-48
Number of pages	18
Journal	Astronomy and Astrophysics
Volume	447
DOIs	https://doi.org/10.1051/0004-6361:20054185
Publication status	Published - 1 Feb 2006

Access to Document

10.1051/0004-6361:20054185

https://ui.adsabs.harvard.edu/abs/2006A&A...447...31A

Cite this

Astier, P., Guy, J., Regnault, N., Pain, R., Aubourg, E., Balam, D., Basa, S., Carlberg, R. G., Fabbro, S., Fouchez, D., Hook, I. M., Howell, D. A., Lafoux, H., Neill, J. D., Palanque-Delabrouille, N., Perrett, K., Pritchet, C. J., Rich, J., Sullivan, M., ... Walton, N. (2006). The Supernova Legacy Survey: measurement of Ω_M, Ω_Λ and w from the first year data set. Astronomy and Astrophysics, 447, 31-48. https://doi.org/10.1051/0004-6361:20054185

@article{2d9cc69925f846b0b465bbcdaf70df8e,

title = "The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set",

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, as part of the CFHT Legacy Survey (CFHTLS). 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: Ω_M= 0.263 ± 0.042 (stat) ± 0.032 (sys) for a flat ΛCDM 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.",

keywords = "supernovae: general, cosmology: observations, cosmological parameters, Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics",

author = "P. Astier and J. Guy and N. Regnault and R. Pain and E. Aubourg and D. Balam and S. Basa and Carlberg, {R. G.} and S. Fabbro and D. Fouchez and Hook, {I. M.} and Howell, {D. A.} and H. Lafoux and Neill, {J. D.} and N. Palanque-Delabrouille and K. Perrett and Pritchet, {C. J.} and J. Rich and M. Sullivan and R. Taillet and G. Aldering and P. Antilogus and V. Arsenijevic and C. Balland and S. Baumont and J. Bronder and H. Courtois and Ellis, {R. S.} and M. Filiol and Gon{\c c}alves, {A. C.} and A. Goobar and D. Guide and D. Hardin and V. Lusset and C. Lidman and R. McMahon and M. Mouchet and A. Mourao and S. Perlmutter and P. Ripoche and C. Tao and N. Walton",

year = "2006",

month = feb,

day = "1",

doi = "10.1051/0004-6361:20054185",

language = "English",

volume = "447",

pages = "31--48",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Astier, P, Guy, J, Regnault, N, Pain, R, Aubourg, E, Balam, D, Basa, S, Carlberg, RG, Fabbro, S, Fouchez, D, Hook, IM, Howell, DA, Lafoux, H, Neill, JD, Palanque-Delabrouille, N, Perrett, K, Pritchet, CJ, Rich, J, Sullivan, M, Taillet, R, Aldering, G, Antilogus, P, Arsenijevic, V, Balland, C, Baumont, S, Bronder, J, Courtois, H, Ellis, RS, Filiol, M, Gonçalves, AC, Goobar, A, Guide, D, Hardin, D, Lusset, V, Lidman, C, McMahon, R, Mouchet, M, Mourao, A, Perlmutter, S, Ripoche, P, Tao, C & Walton, N 2006, 'The Supernova Legacy Survey: measurement of Ω_M, Ω_Λ and w from the first year data set', Astronomy and Astrophysics, vol. 447, pp. 31-48. https://doi.org/10.1051/0004-6361:20054185

TY - JOUR

T1 - The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set

AU - Astier, P.

AU - Guy, J.

AU - Regnault, N.

AU - Pain, R.

AU - Aubourg, E.

AU - Balam, D.

AU - Basa, S.

AU - Carlberg, R. G.

AU - Fabbro, S.

AU - Fouchez, D.

AU - Hook, I. M.

AU - Howell, D. A.

AU - Lafoux, H.

AU - Neill, J. D.

AU - Palanque-Delabrouille, N.

AU - Perrett, K.

AU - Pritchet, C. J.

AU - Rich, J.

AU - Sullivan, M.

AU - Taillet, R.

AU - Aldering, G.

AU - Antilogus, P.

AU - Arsenijevic, V.

AU - Balland, C.

AU - Baumont, S.

AU - Bronder, J.

AU - Courtois, H.

AU - Ellis, R. S.

AU - Filiol, M.

AU - Gonçalves, A. C.

AU - Goobar, A.

AU - Guide, D.

AU - Hardin, D.

AU - Lusset, V.

AU - Lidman, C.

AU - McMahon, R.

AU - Mouchet, M.

AU - Mourao, A.

AU - Perlmutter, S.

AU - Ripoche, P.

AU - Tao, C.

AU - Walton, N.

PY - 2006/2/1

Y1 - 2006/2/1

N2 - 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, as part of the CFHT Legacy Survey (CFHTLS). 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: Ω_M= 0.263 ± 0.042 (stat) ± 0.032 (sys) for a flat ΛCDM 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.

AB - 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, as part of the CFHT Legacy Survey (CFHTLS). 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: Ω_M= 0.263 ± 0.042 (stat) ± 0.032 (sys) for a flat ΛCDM 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.

KW - supernovae: general

KW - cosmology: observations

KW - cosmological parameters

KW - Astrophysics

KW - Astrophysics - Cosmology and Nongalactic Astrophysics

U2 - 10.1051/0004-6361:20054185

DO - 10.1051/0004-6361:20054185

M3 - Article

SN - 0004-6361

VL - 447

SP - 31

EP - 48

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

The Supernova Legacy Survey: measurement of ΩM, ΩΛ and w from the first year data set

Abstract

Access to Document

Fingerprint

Cite this

The Supernova Legacy Survey: measurement of Ω_M, Ω_Λ and w from the first year data set