Computer Science – Databases
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1065...75g&link_type=abstract
2008 NANJING GAMMA-RAY BURST CONFERENCE. AIP Conference Proceedings, Volume 1065, pp. 75-78 (2008).
Computer Science
Databases
Gamma-Ray Sources, Gamma-Ray Bursts, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Astronomical Catalogs, Atlases, Sky Surveys, Databases, Retrieval Systems, Archives, Etc., Plasma Reactions
Scientific paper
In this work we analyse statistical properties of 82 long-GRBs with confirmed redshift and well-sampled light curves observed in R-band. The data gathered here show a cosmological evolution trend on various intrinsic GRB features. In particular, we find that the optical burst duration, the isotropic optical luminosity at the observed maximum and the time-integrated isotropic energy are all redshift dependent. The lack of correlations between the redshift and the observational GRB quantities (i.e. optical fluence and observed peak flux) points out that the detected trends are not affect by significant selection effects. This fact suggests that the intrinsic optical afterglow luminosity follows the cosmological evolution of a circumburst environment which determines the optical afterglow luminosity rate. It is interesting to note that the similar analysis performed for the main parameters of the gamma-ray emission show no evidence for a hypothetical redshift-dependent effect according to which the characteristics of a GRB-event depend on its location in the universe. Furthermore, there are correlations between the luminosity, the total energy and the duration of the gamma-ray and optical emission separately, which can arise from universal features of the observed lightcurves.
Bad'in D.
Bartolini Corrado
Beskin Gregory
Greco Gianluigi
Guarnieri Adriano
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