Gamma-ray bursts with known redshifts (Badjin+, 2009)

Details Gamma-ray bursts with known redshifts (Badjin+, 2009) Gamma-ray bursts with known redshifts (Badjin+, 2009)

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ycat..90350010b&link_type=abstract

VizieR On-line Data Catalog: J/PAZh/35/10. Originally published in: 2009PAZh...35...10B; 2009AstL...35....7B

Mathematics

Logic

Gamma Rays

Scientific paper

Observational parameters of the optical and gamma-ray emissions from 58 gamma-ray bursts (GRBs) with discovered afterglows and known redshifts are analyzed. The distributions of these parameters and pair correlations between them are studied. Approximately half of the objects exhibit a relatively slow decrease in the optical flux at initial afterglow phases (with a power-law index in the decay law {alpha}<1). Correlations have been found between the luminosities, energies, and durations of the optical and gamma-ray emissions, which can be explained by the presence of universal features in the light curves. A correlation of the peak luminosity for afterglows with the redshift and an anticorrelation of their durations with the redshift have been found for the first time. Against the background of a weak z dependence of the total afterglow energy, this effect can be explained by cosmological evolution of the GRB environment, which determines the rate of optical energy release.
(2 data files).

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