The powerful blazar PKS 1440-389
March 2013 H.E.S.S. gamma-ray map (upper left), Swift/XRT count map (upper right), optical count map by ATOM (lower left) and optical DSS map (lower right). The small cross on the ATOM map denotes the…
The distant BL Lac PKS 0301-243
February 2013 Mojave VLBA radio image of the BL Lac object PKS 0301-243, looking essentially on-axis at the jet emerging from the supermassive black hole. PKS 0301-243 is a blazar at redshift z=0.266. This…
A somewhat different kind of detection: “Seeing” the extragalactic background light
January 2013 Illustration of the intensity of extragalactic background light, with the cosmic optical background (COB) and the cosmic infrared background (CIB). Also shown ist the cosmic microwave background (CMB). The numbers indicate total…
The Crab Nebula seen with the H.E.S.S. II telescope
December 2012 The Crab Nebula was obviously one of the early commissioning targets for the H.E.S.S. II telescope. (Image Credit: NASA, ESA, J. Hester, A. Loll (ASU); Acknowledgement: Davide De Martin (Skyfactory)) Virtually every…
HESS J1458-608, a pulsar wind nebula associated with the Fermi pulsar PSR J1459-60
November 2012 Very high energy gamma ray map of HESS J1458-608. The black contours show detection significance of 5 and 7 sigma. The position of the pulsar PSR J1459-60 is marked by green and…
The new source HESS J1641-463 emerging near HESS J1640-465
October 2012 Radio image of the vicinity of the gamma ray source HESS J1640-456, with the two remnants G338.3-0.0 and G338.5+0.1. 843 MHz image from the Sydney University Molonglo Sky Survey. With increasing exposure…
10th Anniversary: The H.E.S.S. gamma ray sky
September 2012 TeVCat sky map of H.E.S.S.-discovered gamma ray sources, as of late August 2012. The colors indicates the likely nature of sources: Supernova remnants (green), pulsar wind nebulae (violet), binaries (yellow), star cluster/star…
The currently most distant source of very high energy gamma rays
August 2012 Optical finding chart for KUV 00311-1938, aka SHBL J003334.2-192133 aka 1RXS J003334.6-192130, from Piranomonte et al. 2007. Shown are the X-ray (large) and radio (small) error circles. Distant Active Galactic Nuclei are…
High and very high energy gamma-rays from the blazar SHBL J001355.9-185406
July 2012 H.E.S.S. gamma-ray image of SHBL J001355.9-185406. Preliminary. Active galactic nuclei (AGN) are among the most powerful gamma-ray emitters in the observed Universe, and constitute a large fraction of objects seen either by…
Discovery of very high energy gamma rays from the quasar PKS 1510-089
June 2012 5 GHz VLA radio image of the blazar PKS 1510-089 with its jet (O’Dea et al. 1988, Sambruna et al. 2004) Blazars are a composite class, consisting of BL Lacertae type objects…