Principal-Component Analysis of Gamma-Ray Bursts’ Spectra

Bagoly, Z. and Horváth, I. and Balázs, L. G. and Borgonovo, L. and Larsson, S. and Mészáros, A. and Ryde, F. (2005) Principal-Component Analysis of Gamma-Ray Bursts’ Spectra. Il nuovo cimento C, 28 (3). pp. 295-298. ISSN 1826-9885

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The principal-component analysis is a statistical method, which lowers the number of important variables in a data set. The use of this method for the bursts’ spectra and afterglows is discussed in this paper. The analysis indicates that three principal components are enough among the eight ones to describe the variablity of the data. The correlation between the spectral index α and the redshift suggests that the thermal emission component becomes more dominant at larger redshifts.

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: Unidentified sources of radiation outside the Solar System ; γ-ray sources; γ-ray bursts ; Cosmology
Subjects: 500 Scienze naturali e Matematica > 520 Astronomia e scienze connesse > 523 Specifici corpi e fenomeni celesti > 523.1 L'universo, galassie, quasar (Classificare qui l'Astronomia descrittiva, la Cosmologia in ambito astronomico)
Depositing User: Marina Spanti
Date Deposited: 15 Mar 2020 11:57
Last Modified: 15 Mar 2020 11:57

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