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The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample

D. ScolnicKavli Institute for Cosmological Physics, The University of Chicago, Chicago, IL 60637, USAD. O. JonesDepartment of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USAA. RestUniversité Bourgogne Franche-ComtéY. C. PanDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 92064, USAR. ChornockAstrophysical Institute, Department of Physics and Astronomy, 251B Clippinger Lab, Ohio University, Athens, OH 45701, USAR. J. FoleyDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 92064, USAM. E. HuberInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAR. KeßlerKavli Institute for Cosmological Physics, The University of Chicago, Chicago, IL 60637, USAGautham NarayanSpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USAAdam G. RiessDepartment of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USAS. RodneyDepartment of Physics and Astronomy, University of South Carolina, 712 Main St., Columbia, SC 29208, USAE. BergerHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USADillon BroutDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAPeter ChallisHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAM. R. DroutThe Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USADouglas P. FinkbeinerDepartment of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USAR. LunnanDepartment of Astronomy, Stockholm University, SE, SwedenR. KirshnerHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USANathan SandersEdward F. SchlaflyLawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USAStephen SmarttAstrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast, BT71NN, UKC. W. StubbsDepartment of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USAJ. TonryInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAW. M. Wood‐VaseyPITT PACC, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USAMichael M. FoleyDepartment of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN, 46556-5670, USAJared HandPITT PACC, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USAEmily Cooper JohnsonDepartment of Astrophysics and Planetary Science, Villanova University, Villanova, PA 19085, USAW. S. BurgettK. C. ChambersInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAP. W. DraperDepartment of Physics, University of Durham Science Laboratories, South Road Durham DH1 3LE, UKK. W. HodappInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAN. KaiserInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAR. P. KudritzkiInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAE. A. MagnierInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAN. MetcalfeDepartment of Physics, University of Durham Science Laboratories, South Road Durham DH1 3LE, UKFabio BresolinInstitute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USAErwin GállAstrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast, BT71NN, UKR. KotakAstrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast, BT71NN, UKM. McCrumAstrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast, BT71NN, UKK. SmithAstrophysics Research Centre, School of Mathematics and Physics, Queens University Belfast, Belfast, BT71NN, UK

2018en

ABI

Annotatsiya

Abstract We present optical light curves, redshifts, and classifications for spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail improvements to the PS1 SN photometry, astrometry, and calibration that reduce the systematic uncertainties in the PS1 SN Ia distances. We combine the subset of PS1 SNe Ia (0.03 < z < 0.68) with useful distance estimates of SNe Ia from the Sloan Digital Sky Survey (SDSS), SNLS, and various low- z and Hubble Space Telescope samples to form the largest combined sample of SNe Ia, consisting of a total of SNe Ia in the range of 0.01 < z < 2.3, which we call the “Pantheon Sample.” When combining Planck 2015 cosmic microwave background (CMB) measurements with the Pantheon SN sample, we find and for the w CDM model. When the SN and CMB constraints are combined with constraints from BAO and local H 0 measurements, the analysis yields the most precise measurement of dark energy to date: and for the CDM model. Tension with a cosmological constant previously seen in an analysis of PS1 and low- z SNe has diminished after an increase of 2× in the statistics of the PS1 sample, improved calibration and photometry, and stricter light-curve quality cuts. We find that the systematic uncertainties in our measurements of dark energy are almost as large as the statistical uncertainties, primarily due to limitations of modeling the low-redshift sample. This must be addressed for future progress in using SNe Ia to measure dark energy.

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DOI: 10.3847/1538-4357/aab9bb

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