• P-ISSN 0974-6846 E-ISSN 0974-5645

Indian Journal of Science and Technology


Indian Journal of Science and Technology

Year: 2017, Volume: 10, Issue: 30, Pages: 1-3

Original Article

Probing the Matter Density at High Redshift


Objectives: We investigate the constraints on cosmological parameters from the observed set of 79 calibrated Gamma Ray Bursts (GRBs). Methods/Statistical Analysis: To measure cosmological parameters (ΩM,H0 ) for ΛCDM cosmology, we use Maximum-likelihood method. We marginalize over H0 using Bayesian approach as well. Finding: Our results gives the value of matter density is (ΩM = 0.18) and expansion rate (H0 = 82.5) for the set of GRBs. Application/Improvements: Method used in this paper helps us to estimate the cosmological parameter. Using this method we have obtain sensible answers in a straightforward manner.

Keywords: Bayesian, Bursts—Cosmology, Gamma Rays, Maximum-Likelihood, Observations—Cosmology


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