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Simultaneous observations of the blazar PKS 2155-304 from ultra-violet to TeV energies
(EDP Sciences, 2020)
Here we report the results of the first ever contemporaneous multi-wavelength observation campaign on the BL Lac object PKS 2155−304 involving Swift, NuSTAR, Fermi-LAT, and H.E.S.S. The use of these instruments allows us ...
Search for dark matter signals towards a selection of recently detected DES dwarf galaxy satellites of the Milky Way with HESS
(APS, 2020)
Dwarf spheroidal galaxy satellites of the Milky Way are prime targets for indirect detection of dark matter with gamma rays due to their proximity, high dark matter content, and absence of nonthermal emission processes. ...
H.E.S.S. detection of very high-energy γ-ray emission from the quasar PKS 0736+017
(EDP Sciences, 2020)
Context. Flat-spectrum radio-quasars (FSRQs) are rarely detected at very high energies (E ≥ 100 GeV) due to their low-frequency-peaked spectral
energy distributions. At present, only six FSRQs are known to emit very ...
Resolving the Crab pulsar wind nebula at teraelectronvolt energies
(Nature, 2020)
The Crab nebula is one of the most-studied cosmic particle accelerators, shining brightly across the entire electromagnetic spectrum up to very-high-energy gamma rays1,2. It is known from observations in the radio to ...
Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance
(Oxford Univ Press, 2020)
We report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311−1938 and PKS 1440−389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were ...
H.E.S.S. and Fermi-LAT observations of PSR B1259-63/LS 2883 during its 2014 and 2017 periastron passages
(EDP Sciences, 2020)
Context. PSR B1259–63/LS 2883 is a gamma-ray binary system consisting of a pulsar in an eccentric orbit around a bright Oe stellar-type companion star that features a dense circumstellar disc. The bright broad-band emission ...
Resolving acceleration to very high energies along the jet of Centaurus APublisher correction: Resolving acceleration to very high energies along the jet of Centaurus A
(Springer Nature, 2020)
The nearby radio galaxy Centaurus A belongs to a class of active galaxies that are luminous at radio wavelengths. Most show collimated relativistic outflows known as jets, which extend over hundreds of thousands of parsecs ...
Probing the magnetic field in the GW170817 outflow using HESS observations
(IOP Publishing, 2020)
The detection of the first electromagnetic counterpart to the binary neutron star (BNS) merger remnant GW170817 established the connection between short γ-ray bursts and BNS mergers. It also confirmed the forging of heavy ...