Ten Years Later: The Completed TeV Galactic Plane Survey
Happy New Year from the H.E.S.S. Collaboration and welcome back to the H.E.S.S. Source of the Month blog! Each month, we will feature one of the latest ground-breaking discoveries from the H.E.S.S. Collaboration. We’re…
HESS J1640−465 – an exceptionally luminous TeV gamma-ray supernova remnant
September 2013 Composite image showing radio continuum emission at 610 MHz (in blue) from the region around HESS J1640-465 / SNR G338.3−0.0, and infrared emission at 8 μm (in green) and at 24 μm…
A photon is a photon is an axion is a photon
August 2013 Illustration of gamma-ray propagation in the presence of oscillations between gamma rays and axion-like particles, in the intergalactic magnetic fields. Photon-to-axion oscillations (or vice-versa) are represented by a crooked line, while the…
The source HESS J1356-645 associated with the young and energetic pulsar PSR J1357-6429
July 2013 1.4 GHz radio signal of the pulsed emission of pulsar PSR J1357−6429, measured with the Parkes radio telescope ( S. Johnston et al.). Pulsar wind nebulae – multi-lightyear-sized bubbles of high-energy electrons…
Very high energy gamma rays from the other side of the Milky-Way: SNR G349.7+0.2
June 2013 The remnant G349.7+0.2 seen in X-rays with Chandra (Lacendic et al. 2000). The crosses show locations of OH maser emission, indicative of interaction of the expanding remnant with a molecular cloud (see…
HESS J1427-608 and – finally – its X-ray counterpart
May 2013 Discovery image of of HESS J1427-608, from Aharonian et al. 2008. The gamma-ray excess at the right of the image is the hard X-ray source known as the Kookaburra/Rabbit. The very high…
Disentangling TeV emission in complex regions: the Scutum arm tangent
April 2013 Composite image of the source C region of HESS J1843-033: in red the radio image (from the VLA survey) showing a radio-galaxy candidate and a small fraction of a putative supernova remnant…
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…