A. J. Castro-Tirado

TL;DR: In this paper, the authors presented the discovery of the optical transient of the long-duration gamma-ray burst GRB 000630, which displayed a power-law decline characterized by a decay slope of = 1:035 0:097.

Abstract: Gamma-ray bursts (GRBs) are thought to arise when an extremely relativistic outflow of particles from a massive explosion (the nature of which is still unclear) interacts with material surrounding the site of the explosion. Observations of the evolving changes in emission at many wavelengths allow us to investigate the origin of the photons, and so potentially determine the nature of the explosion. Here we report the results of γ-ray, optical, infrared, submillimetre, millimetre and radio observations of the burst GRB990123 and its afterglow. Our interpretation of the data indicates that the initial and afterglow emissions are associated with three distinct regions in the fireball. The peak flux of the afterglow, one day after the burst, has a lower frequency than observed for other bursts; this explains the short-lived radio emission. We suggest that the differences between bursts reflect variations in the magnetic-field strength in the afterglow-emitting regions.

TL;DR: In this article, the authors studied the evolution in time of the GRB emission across 17 orders of magnitude in energy, from 5 × 10-6 to 1012 electronvolts, and found that the broadband spectral energy distribution is double-peaked, with the teraelectronvolt emission constituting a distinct spectral component with power comparable to the synchrotron component.

TL;DR: In this article, the authors used very deep observations of the field of the most distant spectroscopically confirmed burst, GRB 090423, at z = 8.2.

TL;DR: In this article, the authors used the ESO Very Large Telescope (VLT) and the FORS2 instruments to obtain an unprecedentedly rich spectral sequence among the hypernovae, making SN 2010bh one of the best studied representatives of this SN class.