Likelihood analysis of GRB evolution with redshift

Graziani, C. and Donaghy, T. Q. and Lamb, D. Q. (2005) Likelihood analysis of GRB evolution with redshift. Il nuovo cimento C, 28 (4\5). pp. 681-684. ISSN 1826-9885

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We present a likelihood approach to modeling multi-dimensional GRB Epk–fluence–redshift data that naturally incorporates instrument detection thresholds. The treatment of instrument thresholds is essential for analyzing evidence for GRB evolution. The method described here compares the data to a uniform jet model, in which the jet parameters are allowed to vary with redshift. Data from different experiments may be modeled jointly. In addition, BATSE data (for which no redshift information is available) may be incorporated by ascribing to each event a likelihood derived from the full model by integrating the probability density over the unknown redshift. The loss of redshift information is mitigated by the large number of available bursts. We discuss the implementation of the method, and validation of it using simulated data.

Item Type: Article
Additional Information: Paper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004.
Uncontrolled Keywords: γ-ray sources; γ-ray bursts
Subjects: 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse
Depositing User: Marina Spanti
Date Deposited: 17 Mar 2020 13:20
Last Modified: 17 Mar 2020 13:20

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