Model independent bounds on Type Ia supernova absolute peak magnitude

Understand

We put constraints on the peak absolute magnitude, $M_B$ of type Ia supernova using the Pantheon sample for type Ia supernova observations and the cosmic chronometers data for the Hubble parameter by a model independent and non-parametric approach.

• Our analysis is based on the Gaussian process regression.
• We find percent level bounds on the peak absolute magnitude given as $M_B=-19.384\pm0.052$.
• For completeness and to check the consistency of the results, we also include the Baryon acoustic oscillation data and the prior of the comoving sound horizon from Planck 2018 cosmic microwave background observations.