Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey

A. Rest; D. Scolnic; R. J. Foley; M. E. Huber; R. Chornock; G. Narayan; J. L. Tonry; E. Berger; A. M. Soderberg; C. W. Stubbs; A. Riess; R. P. Kirshner; S. J. Smartt; E. Schlafly; S. Rodney; M. T. Botticella; D. Brout; P. Challis; I. Czekala; M. Drout; M. J. Hudson; R. Kotak; C. Leibler; R. Lunnan; G. H. Marion; M. McCrum; D. Milisavljevic; A. Pastorello; N. E. Sanders; K. Smith; E. Stafford; D. Thilker; S. Valenti; W. M. Wood-Vasey; Z. Zheng; W. S. Burgett; K. C. Chambers; L. Denneau; P. W. Draper; H. Flewelling; K. W. Hodapp; N. Kaiser; R. P. Kudritzki; E. A. Magnier; N. Metcalfe; P. A. Price; W. Sweeney; R. Wainscoat; C. Waters

doi:10.1088/0004-637X/795/1/44

Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey

A. Rest^*, D. Scolnic, R. J. Foley, M. E. Huber, R. Chornock, G. Narayan, J. L. Tonry, E. Berger, A. M. Soderberg, C. W. Stubbs, A. Riess, R. P. Kirshner, S. J. Smartt, E. Schlafly, S. Rodney, M. T. Botticella, D. Brout, P. Challis, I. Czekala, M. DroutM. J. Hudson, R. Kotak, C. Leibler, R. Lunnan, G. H. Marion, M. McCrum, D. Milisavljevic, A. Pastorello, N. E. Sanders, K. Smith, E. Stafford, D. Thilker, S. Valenti, W. M. Wood-Vasey, Z. Zheng, W. S. Burgett, K. C. Chambers, L. Denneau, P. W. Draper, H. Flewelling, K. W. Hodapp, N. Kaiser, R. P. Kudritzki, E. A. Magnier, N. Metcalfe, P. A. Price, W. Sweeney, R. Wainscoat, C. Waters

^*Corresponding author for this work

Physics and Astronomy

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Abstract

We present griz_P1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a combination of on-site measurements of the instrument response function and observations of spectrophotometric standard stars. We find that the systematic uncertainties in the photometric system are currently 1.2% without accounting for the uncertainty in the Hubble Space Telescope Calspec definition of the AB system. A Hubble diagram is constructed with a subset of 113 out of 146 SNe Ia that pass our light curve quality cuts. The cosmological fit to 310 SNe Ia (113 PS1 SNe Ia + 222 light curves from 197 low-z SNe Ia), using only supernovae (SNe) and assuming a constant dark energy equation of state and flatness, yields w = -1.120^+0.360_-0.206(Stat)^+0.269_0.291(Sys). When combined with BAO+CMB(Planck)+H₀, the analysis yields Ω_M = 0.280^+0.013_0.012 and w = -1.166^+0.072_-0.069 including all identified systematics. The value of w is inconsistent with the cosmological constant value of -1 at the 2.3σ level. Tension endures after removing either the baryon acoustic oscillation (BAO) or the H₀ constraint, though it is strongest when including the H₀ constraint. If we include WMAP9 cosmic microwave background (CMB) constraints instead of those from Planck, we find w = -1.124^+0.083_-0.065, which diminishes the discord to <2σ. We cannot conclude whether the tension with flat ΛCDM is a feature of dark energy, new physics, or a combination of chance and systematic errors. The full Pan-STARRS1 SN sample with ∼three times as many SNe should provide more conclusive results.

Original language	English (US)
Article number	44
Journal	Astrophysical Journal
Volume	795
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/795/1/44
State	Published - Nov 1 2014

Funding

Keywords

cosmological parameters
cosmology: observations
dark energy
supernovae: general

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/795/1/44

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Rest, A., Scolnic, D., Foley, R. J., Huber, M. E., Chornock, R., Narayan, G., Tonry, J. L., Berger, E., Soderberg, A. M., Stubbs, C. W., Riess, A., Kirshner, R. P., Smartt, S. J., Schlafly, E., Rodney, S., Botticella, M. T., Brout, D., Challis, P., Czekala, I., ... Waters, C. (2014). Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey. Astrophysical Journal, 795(1), Article 44. https://doi.org/10.1088/0004-637X/795/1/44

@article{014f7a5979504461ae2a0c80fb35533b,

title = "Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey",

abstract = "We present grizP1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a combination of on-site measurements of the instrument response function and observations of spectrophotometric standard stars. We find that the systematic uncertainties in the photometric system are currently 1.2% without accounting for the uncertainty in the Hubble Space Telescope Calspec definition of the AB system. A Hubble diagram is constructed with a subset of 113 out of 146 SNe Ia that pass our light curve quality cuts. The cosmological fit to 310 SNe Ia (113 PS1 SNe Ia + 222 light curves from 197 low-z SNe Ia), using only supernovae (SNe) and assuming a constant dark energy equation of state and flatness, yields w = -1.120+0.360-0.206(Stat)+0.2690.291(Sys). When combined with BAO+CMB(Planck)+H0, the analysis yields ΩM = 0.280+0.0130.012 and w = -1.166+0.072-0.069 including all identified systematics. The value of w is inconsistent with the cosmological constant value of -1 at the 2.3σ level. Tension endures after removing either the baryon acoustic oscillation (BAO) or the H0 constraint, though it is strongest when including the H0 constraint. If we include WMAP9 cosmic microwave background (CMB) constraints instead of those from Planck, we find w = -1.124+0.083-0.065, which diminishes the discord to <2σ. We cannot conclude whether the tension with flat ΛCDM is a feature of dark energy, new physics, or a combination of chance and systematic errors. The full Pan-STARRS1 SN sample with ∼three times as many SNe should provide more conclusive results.",

keywords = "cosmological parameters, cosmology: observations, dark energy, supernovae: general",

author = "A. Rest and D. Scolnic and Foley, {R. J.} and Huber, {M. E.} and R. Chornock and G. Narayan and Tonry, {J. L.} and E. Berger and Soderberg, {A. M.} and Stubbs, {C. W.} and A. Riess and Kirshner, {R. P.} and Smartt, {S. J.} and E. Schlafly and S. Rodney and Botticella, {M. T.} and D. Brout and P. Challis and I. Czekala and M. Drout and Hudson, {M. J.} and R. Kotak and C. Leibler and R. Lunnan and Marion, {G. H.} and M. McCrum and D. Milisavljevic and A. Pastorello and Sanders, {N. E.} and K. Smith and E. Stafford and D. Thilker and S. Valenti and Wood-Vasey, {W. M.} and Z. Zheng and Burgett, {W. S.} and Chambers, {K. C.} and L. Denneau and Draper, {P. W.} and H. Flewelling and Hodapp, {K. W.} and N. Kaiser and Kudritzki, {R. P.} and Magnier, {E. A.} and N. Metcalfe and Price, {P. A.} and W. Sweeney and R. Wainscoat and C. Waters",

year = "2014",

month = nov,

day = "1",

doi = "10.1088/0004-637X/795/1/44",

language = "English (US)",

volume = "795",

journal = "Astrophysical Journal",

issn = "0004-637X",

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Rest, A, Scolnic, D, Foley, RJ, Huber, ME, Chornock, R, Narayan, G, Tonry, JL, Berger, E, Soderberg, AM, Stubbs, CW, Riess, A, Kirshner, RP, Smartt, SJ, Schlafly, E, Rodney, S, Botticella, MT, Brout, D, Challis, P, Czekala, I, Drout, M, Hudson, MJ, Kotak, R, Leibler, C, Lunnan, R, Marion, GH, McCrum, M, Milisavljevic, D, Pastorello, A, Sanders, NE, Smith, K, Stafford, E, Thilker, D, Valenti, S, Wood-Vasey, WM, Zheng, Z, Burgett, WS, Chambers, KC, Denneau, L, Draper, PW, Flewelling, H, Hodapp, KW, Kaiser, N, Kudritzki, RP, Magnier, EA, Metcalfe, N, Price, PA, Sweeney, W, Wainscoat, R & Waters, C 2014, 'Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey', Astrophysical Journal, vol. 795, no. 1, 44. https://doi.org/10.1088/0004-637X/795/1/44

TY - JOUR

T1 - Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey

AU - Rest, A.

AU - Scolnic, D.

AU - Foley, R. J.

AU - Huber, M. E.

AU - Chornock, R.

AU - Narayan, G.

AU - Tonry, J. L.

AU - Berger, E.

AU - Soderberg, A. M.

AU - Stubbs, C. W.

AU - Riess, A.

AU - Kirshner, R. P.

AU - Smartt, S. J.

AU - Schlafly, E.

AU - Rodney, S.

AU - Botticella, M. T.

AU - Brout, D.

AU - Challis, P.

AU - Czekala, I.

AU - Drout, M.

AU - Hudson, M. J.

AU - Kotak, R.

AU - Leibler, C.

AU - Lunnan, R.

AU - Marion, G. H.

AU - McCrum, M.

AU - Milisavljevic, D.

AU - Pastorello, A.

AU - Sanders, N. E.

AU - Smith, K.

AU - Stafford, E.

AU - Thilker, D.

AU - Valenti, S.

AU - Wood-Vasey, W. M.

AU - Zheng, Z.

AU - Burgett, W. S.

AU - Chambers, K. C.

AU - Denneau, L.

AU - Draper, P. W.

AU - Flewelling, H.

AU - Hodapp, K. W.

AU - Kaiser, N.

AU - Kudritzki, R. P.

AU - Magnier, E. A.

AU - Metcalfe, N.

AU - Price, P. A.

AU - Sweeney, W.

AU - Wainscoat, R.

AU - Waters, C.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - We present grizP1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a combination of on-site measurements of the instrument response function and observations of spectrophotometric standard stars. We find that the systematic uncertainties in the photometric system are currently 1.2% without accounting for the uncertainty in the Hubble Space Telescope Calspec definition of the AB system. A Hubble diagram is constructed with a subset of 113 out of 146 SNe Ia that pass our light curve quality cuts. The cosmological fit to 310 SNe Ia (113 PS1 SNe Ia + 222 light curves from 197 low-z SNe Ia), using only supernovae (SNe) and assuming a constant dark energy equation of state and flatness, yields w = -1.120+0.360-0.206(Stat)+0.2690.291(Sys). When combined with BAO+CMB(Planck)+H0, the analysis yields ΩM = 0.280+0.0130.012 and w = -1.166+0.072-0.069 including all identified systematics. The value of w is inconsistent with the cosmological constant value of -1 at the 2.3σ level. Tension endures after removing either the baryon acoustic oscillation (BAO) or the H0 constraint, though it is strongest when including the H0 constraint. If we include WMAP9 cosmic microwave background (CMB) constraints instead of those from Planck, we find w = -1.124+0.083-0.065, which diminishes the discord to <2σ. We cannot conclude whether the tension with flat ΛCDM is a feature of dark energy, new physics, or a combination of chance and systematic errors. The full Pan-STARRS1 SN sample with ∼three times as many SNe should provide more conclusive results.

AB - We present grizP1 light curves of 146 spectroscopically confirmed Type Ia supernovae (SNe Ia; 0.03 < z < 0.65) discovered during the first 1.5 yr of the Pan-STARRS1 Medium Deep Survey. The Pan-STARRS1 natural photometric system is determined by a combination of on-site measurements of the instrument response function and observations of spectrophotometric standard stars. We find that the systematic uncertainties in the photometric system are currently 1.2% without accounting for the uncertainty in the Hubble Space Telescope Calspec definition of the AB system. A Hubble diagram is constructed with a subset of 113 out of 146 SNe Ia that pass our light curve quality cuts. The cosmological fit to 310 SNe Ia (113 PS1 SNe Ia + 222 light curves from 197 low-z SNe Ia), using only supernovae (SNe) and assuming a constant dark energy equation of state and flatness, yields w = -1.120+0.360-0.206(Stat)+0.2690.291(Sys). When combined with BAO+CMB(Planck)+H0, the analysis yields ΩM = 0.280+0.0130.012 and w = -1.166+0.072-0.069 including all identified systematics. The value of w is inconsistent with the cosmological constant value of -1 at the 2.3σ level. Tension endures after removing either the baryon acoustic oscillation (BAO) or the H0 constraint, though it is strongest when including the H0 constraint. If we include WMAP9 cosmic microwave background (CMB) constraints instead of those from Planck, we find w = -1.124+0.083-0.065, which diminishes the discord to <2σ. We cannot conclude whether the tension with flat ΛCDM is a feature of dark energy, new physics, or a combination of chance and systematic errors. The full Pan-STARRS1 SN sample with ∼three times as many SNe should provide more conclusive results.

KW - cosmological parameters

KW - cosmology: observations

KW - dark energy

KW - supernovae: general

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UR - http://www.scopus.com/inward/citedby.url?scp=84908095238&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/795/1/44

DO - 10.1088/0004-637X/795/1/44

M3 - Article

AN - SCOPUS:84908095238

SN - 0004-637X

VL - 795

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 44

ER -

Cosmological constraints from measurements of type Ia supernovae discovered during the first 1.5 yr of the Pan-STARRS1 survey

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