The Pantheon+ Analysis: The Full Data Set and Light-curve Release

By D. Scolnic, D. Brout, A. Carr, A. Riess, T. Davis, Arianna M. Dwomoh, David O. Jones, Noor Ali, Pranav Charvu, R. Chen and 20 more. Astrophysical Journal, 2021

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Here we present 1701 light curves of 1550 unique, spectroscopically confirmed Type Ia supernovae (SNe Ia) that will be used to infer cosmological parameters as part of the Pantheon+ SN analysis and the Supernovae and H 0 for the Equation of State of dark energy distance-ladder analysis. This effort is one part of a series of works that perform an extensive review of redshifts, peculiar velocities, photometric calibration, and intrinsic-scatter models of SNe Ia. The total number of light curves, which are compiled across 18 different surveys, is a significant increase from the first Pantheon analysis (1048 SNe), particularly at low redshift (z). Furthermore, unlike in the Pantheon analysis, we include light curves for SNe with z < 0.01 such that SN systematic covariance can be included in a joint measurement of the Hubble constant (H 0) and the dark energy equation-of-state parameter (w). We use the large sample to compare properties of 151 SNe Ia observed by multiple surveys and 12 pairs/triplets of “SN siblings”—SNe found in the same host galaxy. Distance measurements, application of bias corrections, and inference of cosmological parameters are discussed in the companion paper by Brout et al., and the determination of H 0 is discussed by Riess et al. These analyses will measure w with ∼3% precision and H 0 with ∼1 km s−1 Mpc−1 precision.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/563e16657737df95e5bdaf6cad852c415b154b42

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Citations in the corpus

Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument (2023, background): “…al. 2021; Neveux et al. 2020; du Mas des Bourboux et al. 2020), CMB data from Planck , SNe Ia data from the Pantheon sample (Scol-nic et al. 2018) and more recently (Scolnic et al. 2022), and weak lensing data from the Dark Energy Survey (Abbott et al. 2018) and more recently (Abbott et al. 2022b).”
Interpreting DESI's evidence for evolving dark energy (2024, neutral): “[3] variously as 2.5 sigma, 3.5 sigma, and 3.9 sigma depending on the supernova dataset included in the compilation (respectively, PantheonPlus [4], Union3 [5], and DESY5 [6]).”
The Pantheon+ Analysis: Cosmological Constraints (2022, methodology): “The survey SN photometry compiled in Scolnic et al. (2022) and analyzed here is from DES34 (Brout et al. 2019a; Smith et al. 2020a), Foundation1 (Foley et al. 2018), PanSTARRS (PS1; Scolnic et al. 2018b), Supernova Legacy Survey (SNLS; Betoule et al. 2014), Sloan Digital Sky Survey (SDSS; Sako et…”
Robust preference for Dynamical Dark Energy in DESI BAO and SN measurements (2024, methodology): “V.”
The Ups and Downs of Early Dark Energy solutions to the Hubble tension: A review of models, hints and constraints circa 2023 (2023, background): “26 (Pantheon+ [51]) into a measurement of the luminosity distance (and therefore the expansion rate) between these redshifts.”