paper

Calibrating Gamma-Ray Bursts by Using a Gaussian Process with Type Ia Supernovae

arXiv:2211.02473 · doi:10.3847/1538-4357/aca08a

Abstract

In this paper, we calibrate the Amati relation (the - correlation) of gamma-ray bursts (GRBs) in a cosmology-independent way. By using Gaussian process to reconstruct the smoothed luminosity distance from the Pantheon type Ia supernovae (SNe Ia) sample, we utilize the reconstructed results to calibrate the - correlation with the Markov Chain Monte Carlo method and construct a Hubble diagram with the A220 GRB data, in which there are A118 GRB data with the higher qualities appropriate for cosmological purposes. With 98 GRBs at in the A118 sample and the observed Hubble data, we obtain =, = for the flat CDM model, and =, =, = for the flat CDM model, which are consistent with those from fitting the coefficients of the Amati relation and the cosmological parameters simultaneously.

14 pages, 9 figures, 5 Tables, accepted for publication in ApJ. Now matches the editorially revised version

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