Ullrich Schwanke

TL;DR: In this paper, an alternative approach is proposed based on the detection and identification of EBL absorption features in high-energy spectra of objects of known redshift, which provides the most stringent upper limit to date on the EBL in the Opt-NIR band, which appears significantly lower than expected from the current direct estimates and very close to the absolute lower limit represented by the integrated light of resolved galaxies.

TL;DR: The distribution in Galactic latitude of the detected sources appears to be consistent with a scale height in the Galactic disk for the parent population smaller than 100 pc, consistent with expectations for supernova remnants and/or pulsar wind nebulae.

TL;DR: In this paper, a very high-energy γ-ray emission from the Galactic Centre region has been measured using HESS, the High Energy Stereoscopic System recently constructed in Namibia, South West Africa.

TL;DR: In this article, the authors present a measurement of the cosmic-ray electron spectrum with H.E.S. starting at 340 GeV and show no indication of a structure in the electron spectrum, but rather a power-law spectrum with spectral index of 3.0 +- 0.1 (stat.) + − 0.3 (syst.) which steepens at about 1 TeV.

TL;DR: Deep γ-ray observations with arcminute angular resolution of the region surrounding the Galactic Centre are reported, which show the expected tracer of the presence of petaelectronvolt protons within the central 10 parsecs of the Galaxy, and it is proposed that the supermassive black hole Sagittarius A* is linked to this PeVatron.