Figure 1

The Hubble residual diagram before (top) and after (bottom) the age-bias correction. Corrections are applied to supernova data from the Dark Energy Survey project. After correction, the dataset no longer supports the ΛCDM model (red line) with a cosmological constant, but instead more closely fits with a time-varying dark energy model favoured by a combined analysis using only baryonic acoustic oscillations and cosmic microwave background data (blue line).