SNLS: 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. Taillet; G. Aldering; P. Antilogus; V. Arsenijevic; C. Balland; S. Baumont; J. Bronder; H. Courtois; R. S. Ellis; M. Filiol; A. C. Goncalves; A. Goobar; D. Guide; D. Hardin; V. Lusset; C. Lidman; R. McMahon; M. Mouchet; A. Mourao; S. Perlmutter; P. Ripoche; C. Tao; N. Walton

SNLS: 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. Goncalves, 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 conference › Paper

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. 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 : w = 0.263 ± 0.042(stat) ± 0.032(sys) for a flat Λ CDM 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	15.04
Publication status	Published - 1 Dec 2005

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https://ui.adsabs.harvard.edu/abs/2005AAS...207.1504A

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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. (2005). SNLS: Measurement of Ω _M, Ω _Λ and w from the First Year Data Set. 15.04. https://ui.adsabs.harvard.edu/abs/2005AAS...207.1504A

@conference{1e724e2754394120bb9731323a781086,

title = "SNLS: Measurement of Ω M, Ω Λ 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. 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 : w = 0.263 ± 0.042(stat) ± 0.032(sys) for a flat Λ CDM 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.",

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 Goncalves, {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 = "2005",

month = dec,

day = "1",

language = "English",

pages = "15.04",

}

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, Goncalves, 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 2005, 'SNLS: Measurement of Ω _M, Ω _Λ and w from the First Year Data Set', pp. 15.04. <https://ui.adsabs.harvard.edu/abs/2005AAS...207.1504A>

TY - CONF

T1 - SNLS: Measurement of Ω M, Ω Λ 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 - Goncalves, 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 - 2005/12/1

Y1 - 2005/12/1

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. 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 : w = 0.263 ± 0.042(stat) ± 0.032(sys) for a flat Λ CDM 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. 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 : w = 0.263 ± 0.042(stat) ± 0.032(sys) for a flat Λ CDM 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.

M3 - Paper

SP - 15.04

ER -

SNLS: Measurement of Ω M, Ω Λ and w from the First Year Data Set

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SNLS: Measurement of Ω _M, Ω _Λ and w from the First Year Data Set