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Unraveling The Complex Nature Of The Very High-Energy -Ray Blazar PKS 2155-304
Alicja Wierzcholska, Michael Zacharias, Felix Jankowsky +2
PKS 2155-304 is a blazar located in the Southern Hemisphere, monitored with the High Energy Stereoscopic System (H.E.S.S.) at very high energy (VHE, E>100 GeV) rays every year…
A very-high-energy component deep in the Gamma-ray Burst afterglow
H. Abdalla R. Adam F. Aharonian F. Ait Benkhali E. O. Anguener M. Arakawa, C. Arcaro, C. Armand +219
Gamma-ray bursts (GRBs) are brief flashes of gamma rays, considered to be the most energetic explosive phenomena in the Universe. The emission from GRBs comprises a short (typicall…
CTA 102 -- year over year receiving you
M. Zacharias, M. Boettcher, F. Jankowsky +3
The FSRQ CTA 102 (z=1.032) has been tremendously active over the last few years. During its peak activity lasting several months in late 2016 and early 2017, the gamma-ray and opti…
Combined Dark Matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, HESS, MAGIC and VERITAS
Louise Oakes, Celine Armand, Eric Charles +13
The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide r…
Observations of blazar PKS 2023-07 in flaring state with HESS and Fermi-LAT in 2016-2017 and constraints on an intrinsic cut-off
Gabriel Emery, Felix Jankowsky, Jean-Philippe Lenain +7
PKS 2023-07 is a flat spectrum radio quasar located at a redshift , farther than any source currently detected at very high energies ( GeV). At such energies, absor…
Observations of the FSRQ 3C 279 during the flaring state of 2017 and 2018 with H.E.S.S
Gabriel Emery, Matteo Cerruti, Anton Dmytriiev +4
The Flat Spectrum Radio Quasar 3C 279 has been very active since a few years with multiple flaring events occurring at high energies. As part of the H.E.S.S. Target of Opportunity…
H.E.S.S. Monitoring of PKS 2155-304 in 2015 and 2016
Alicja Wierzcholska, Michael Zacharias, Felix Jankowsky +2
PKS 2155-304 is one of the brightest blazar located in Southern Hemisphere, monitored with H.E.S.S. since the first light of the experiment. Here we report multiwavelength monitori…
Constraints on the emission region of 3C 279 during strong flares in 2014 and 2015 through VHE gamma-ray observations with H.E.S.S
H. E. S. S. Collaboration, H. Abdalla, R. Adam +224
The flat spectrum radio quasar 3C 279 is known to exhibit pronounced variability in the high-energy (MeVGeV) -ray band, which is continuously monitored with Fer…
H.E.S.S. and Suzaku observations of the Vela X pulsar wind nebula
H. E. S. S. Collaboration
Pulsar Wind Nebulae (PWNe) represent the most prominent population of Galactic very-high-energy gamma-ray sources and are thought to be an efficient source of leptonic cosmic rays.…
Upper Limits on Very-High-Energy Gamma-ray Emission from Core-Collapse Supernovae Observed with H.E.S.S
H. E. S. S. Collaboration, :, H. Abdalla +225
Young core-collapse supernovae with dense-wind progenitors may be able to accelerate cosmic-ray hadrons beyond the knee of the cosmic-ray spectrum, and this may result in measurabl…
The VHE Gamma-Ray View of the FSRQ PKS~1510-089
Michael Zacharias, Dijana Dominis Prester, Felix Jankowsky +9
The flat spectrum radio quasar PKS 1510-089 is a monitored target in many wavelength bands due to its high variability. It was detected as a very-high-energy (VHE) -ray emitter…
The Long-Lasting Activity in the Flat Spectrum Radio Quasar (FSRQ) CTA~102
Michael Zacharias, Markus Böttcher, Felix Jankowsky +3
The flat spectrum radio quasar CTA 102 () went through a tremendous phase of variability. Since early 2016 the gamma-ray flux level has been significantly higher than in…
The 2014 TeV Gamma-ray Flare of Mrk 501 Seen with H.E.S.S.: Temporal and Spectral Constraints on Lorentz Invariance Violation
H. E. S. S. Collaboration, :, H. Abdalla +232
The blazar Mrk 501 (z=0.034) was observed at very-high-energy (VHE, ~GeV) gamma-ray wavelengths during a bright flare on the night of 2014 June 23-24 (MJD 56832) with…