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

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 similar to 3% precision and H (0) with similar to 1 km s(-1) Mpc(-1) precision.

Automated summary

This study presents 1550 unique light curves of Type Ia supernovae that will be used to infer cosmological parameters. Compared to previous analyses, the number of light curves has significantly increased, particularly at low redshift. Furthermore, properties of the Type Ia supernovae are compared in this analysis. These analyses will provide measurements of cosmological parameters with high precision.