A new open-source cross-calibration of 11 supernova surveys cuts the photometric systematic on the dark-energy parameter w by about 1.5x for Pantheon+ and shows small calibration shifts can be amplified in distances.
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A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
A new open-source cross-calibration of 11 supernova surveys cuts the photometric systematic on the dark-energy parameter w by about 1.5x for Pantheon+ and shows small calibration shifts can be amplified in distances.