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Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample

Publication ,  Journal Article
Scolnic, D; Rest, A; Riess, A; Huber, ME; Foley, RJ; Brout, D; Chornock, R; Narayan, G; Tonry, JL; Berger, E; Soderberg, AM; Stubbs, CW ...
Published in: Astrophysical Journal
November 1, 2014

We probe the systematic uncertainties from the 113 Type Ia supernovae (SN Ia) in the Pan-STARRS1 (PS1) sample along with 197 SN Ia from a combination of low-redshift surveys. The companion paper by Rest et al. describes the photometric measurements and cosmological inferences from the PS1 sample. The largest systematic uncertainty stems from the photometric calibration of the PS1 and low-z samples. We increase the sample of observed Calspec standards from 7 to 10 used to define the PS1 calibration system. The PS1 and SDSS-II calibration systems are compared and discrepancies up to ∼0.02 mag are recovered. We find uncertainties in the proper way to treat intrinsic colors and reddening produce differences in the recovered value of w up to 3%. We estimate masses of host galaxies of PS1 supernovae and detect an insignificant difference in distance residuals of the full sample of 0.037 ± 0.031 mag for host galaxies with high and low masses. Assuming flatness and including systematic uncertainties in our analysis of only SNe measurements, we find w = -1.120+0.360-0.206(Stat)+0.269-0.291(Sys). With additional constraints from Baryon acoustic oscillation, cosmic microwave background (CMB) (Planck) and H0 measurements, we find w = -1.166+0.072-0.069 and Ωm = 0.280+0.013-0.012 (statistical and systematic errors added in quadrature). The significance of the inconsistency with w = -1 depends on whether we use Planck or Wilkinson Microwave Anisotropy Probe measurements of the CMB: wBAO+H0+SN+WMAP = -1.124+0.083-0.065.

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Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

November 1, 2014

Volume

795

Issue

1

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Scolnic, D., Rest, A., Riess, A., Huber, M. E., Foley, R. J., Brout, D., … Waters, C. (2014). Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample. Astrophysical Journal, 795(1). https://doi.org/10.1088/0004-637X/795/1/45
Scolnic, D., A. Rest, A. Riess, M. E. Huber, R. J. Foley, D. Brout, R. Chornock, et al. “Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample.” Astrophysical Journal 795, no. 1 (November 1, 2014). https://doi.org/10.1088/0004-637X/795/1/45.
Scolnic D, Rest A, Riess A, Huber ME, Foley RJ, Brout D, et al. Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample. Astrophysical Journal. 2014 Nov 1;795(1).
Scolnic, D., et al. “Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample.” Astrophysical Journal, vol. 795, no. 1, Nov. 2014. Scopus, doi:10.1088/0004-637X/795/1/45.
Scolnic D, Rest A, Riess A, Huber ME, Foley RJ, Brout D, Chornock R, Narayan G, Tonry JL, Berger E, Soderberg AM, Stubbs CW, Kirshner RP, Rodney S, Smartt SJ, Schlafly E, Botticella MT, 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. Systematic uncertainties associated with the cosmological analysis of the first PAN-STARRS1 type Ia supernova sample. Astrophysical Journal. 2014 Nov 1;795(1).
Journal cover image

Published In

Astrophysical Journal

DOI

EISSN

1538-4357

ISSN

0004-637X

Publication Date

November 1, 2014

Volume

795

Issue

1

Related Subject Headings

  • Astronomy & Astrophysics
  • 5109 Space sciences
  • 5107 Particle and high energy physics
  • 5101 Astronomical sciences
  • 0306 Physical Chemistry (incl. Structural)
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences