Abstract
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.
| Original language | English (US) |
|---|---|
| Article number | 113 |
| Journal | Astrophysical Journal |
| Volume | 938 |
| Issue number | 2 |
| DOIs | |
| State | Published - Oct 1 2022 |
Funding
D.S. is supported by Department of Energy grant DE-SC0010007, David and Lucile Packard Foundation, and the John Templeton Foundation grant 62314. This manuscript is based upon work supported by the National Aeronautics and Space Administration (NASA) under contracts NNG16PJ34C and NNG17PX03C issued through the WFIRST Science Investigation Teams Program. D.S. and R.J.F. are supported in part by NASA grant 14-WPS14-0048. T.M.D. and A.C. are supported by an Australian Research Council Laureate Fellowship, FL180100168. D.O.J. is supported by NASA through Hubble Fellowship grant HF2-51462.001 awarded by the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. P.J.B.'s work is supported by NASA ADAP grant 80NSSC20K0456: \u201CSOUSA\u2019s Sequel: Improving Standard Candles by Improving UV Calibration.\u201D The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, The Johns Hopkins University, Durham University, the University of Edinburgh, the Queen\u2019s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, STScI, NASA under grant NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, National Science Foundation (NSF) grant AST-1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation. D.B. acknowledges support for this work provided by NASA through the NASA Hubble Fellowship grant HST-HF2-51430.001 awarded by STScI. A.V.F.'s group at U.C. Berkeley acknowledges generous support from Marc J. Staley (whose fellowship partly funded B.E.S. while contributing to the work presented herein as a graduate student), the TABASGO Foundation, the Christopher R. Redlich fund, the Miller Institute for Basic Research in Science (in which A.V.F. is a Miller Senior Fellow), and many individual donors. The UCSC team is supported in part by NSF grants AST-1518052 and AST-1815935, the Gordon & Betty Moore Foundation, the Heising-Simons Foundation, and from fellowships from the Alfred P. Sloan Foundation and the David and Lucile Packard Foundation to R.J.F. D.A.C. acknowledges support from the National Science Foundation Graduate Research Fellowship under grant DGE1339067. M.R.S. is supported by the National Science Foundation Graduate Research Fellowship Program under grant No. 1842400. KAIT (for LOSS) and its ongoing operation were made possible by donations from Sun Microsystems, Inc., the Hewlett-Packard Company, AutoScope Corporation, Lick Observatory, the NSF, the University of California, the Sylvia & Jim Katzman Foundation, and the TABASGO Foundation. Research at Lick Observatory is partially supported by a generous gift from Google.
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science