Reanalysis with Corrected Pantheon+ and DES-DOVEKIE Leaves Hubble Tension Intact

A newly published reanalysis of major Type Ia supernova datasets finds that recent updates to two closely watched data sets do not meaningfully lower the locally measured Hubble constant, leaving the long-running Hubble tension essentially unchanged.

The paper reports an updated local value of 73.264 ± 0.806 kilometers per second per megaparsec, after applying corrected Pantheon+ supernova magnitudes within the H0 Distance Network framework. That remains well above the paper’s early-universe comparison value of 67.24 ± 0.35 km/s/Mpc, derived from recent combined cosmic microwave background results under the standard Lambda-CDM cosmology, producing a reported 6.85-sigma gap. The paper’s baseline H0DN value before the update was 73.499 ± 0.809 km/s/Mpc.

The study, titled “Updated 1.1% Precision Values of the Hubble Constant with Corrected Pantheon+ and Dark Energy Survey (DES)-DOVEKIE Type Ia Supernovae,” is by Shouvik Roy Choudhury of the Institute of Astronomy and Astrophysics at Academia Sinica. It appears on arXiv as arXiv:2607.24443v2, with the arXiv page listing a 2026 Astrophysical Journal Letters reference and saying the submission closely matches the published version. The work is a reanalysis of public data and code, not a new observing campaign, and it uses public files from the H0 Distance Network, or H0DN.

The key change examined in the paper is a revised host-mass correction in the corrected Pantheon+ data, a tweak tied to the properties of the galaxies that host Type Ia supernovae. According to the paper, 114 of 1,701 Pantheon+ apparent-magnitude entries changed. Within the H0DN subset, 52 of 277 Hubble-flow rows were affected. The paper says the calibrator supernovae — the nearby explosions used to anchor the distance ladder — were not affected by those Pantheon+ corrections. When Choudhury rebuilt the full Hubble-flow rung with corrected Pantheon+, the result was still 73.139 ± 0.791 km/s/Mpc, corresponding to a 6.82-sigma tension by the paper’s benchmark.

The study also brings in DES-DOVEKIE supernovae for the distance ladder for the first time in this framework and again finds little change. Using 220 supernovae from DES-DOVEKIE, with 196 overlapping corrected Pantheon+ objects used to place DES-DOVEKIE onto the H0DN apparent-magnitude scale, the paper reports 73.267 ± 0.828 km/s/Mpc, or 6.70 sigma tension. In a version that propagates offset uncertainty, the result is 73.175 ± 0.854 km/s/Mpc.

Those results matter because some researchers had asked whether recent revisions to supernova inputs, especially in Pantheon+, might ease the discrepancy between local and early-universe expansion measurements. In this analysis, the answer is no: the local estimate shifts only slightly and stays near 73.2.

The Hubble tension is the persistent mismatch between measurements of the universe’s expansion rate from the nearby, later universe and values inferred from the early universe using the cosmic microwave background under standard cosmology. Local measurements typically land near 73, while early-universe values are around 67. The exact statistical significance depends on which cosmic microwave background benchmark is used; in this paper, Choudhury uses a recent tight combined-CMB value rather than only an older Planck-only estimate. His conclusion is direct: “Neither update resolves the Hubble tension.”