R. Filgas

TL;DR: It is reported that a supernova was associated with the ultra-long-duration γ-ray burst GRB 111209A, at a redshift z of 0.677, and this supernova is more than three times more luminous than type Ic supernovae associated with long-duration μ-ray bursts, and its spectrum is distinctly different.

TL;DR: In this article, the authors used the afterglow detection statistics of the systematic follow-up observations performed with GROND since mid-2007 in order to derive the fraction of dark gamma-ray bursts according to different methods, and to distinguish between various scenarios for "dark bursts".

TL;DR: In this article, the authors report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations by GROND which led to the discovery of its optical/NIR afterglow and the recognition of its high-z nature via the detection of a spectral break between the i' and z' bands.

TL;DR: In this article, the authors present data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 galaxies selected by long γ-ray bursts (GRBs) at 0.1 2 by 0.4 dex.

TL;DR: In this paper, the authors presented data and initial results from VLT/X-Shooter emission-line spectroscopy of 96 GRB-selected galaxies at 0.1