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View article: Prospects of the AMT single-dish science performance for monitoring gamma-ray blazars
Prospects of the AMT single-dish science performance for monitoring gamma-ray blazars Open
Blazars make up the largest fraction of Fermi-LAT-detected sources of high-energy gamma-ray emission. At the same time, their emission is known to be highly variable throughout the electromagnetic spectrum. With hints of their highest frac…
View article: A comparative analysis of GNSS-inferred precipitable water vapour at the potential sites for the Africa Millimetre Telescope
A comparative analysis of GNSS-inferred precipitable water vapour at the potential sites for the Africa Millimetre Telescope Open
The Event Horizon Telescope (EHT) is a network of antennas across the globe currently used to image supermassive black holes (SMBHs) at a frequency of 230 GHz. Since the release of the image of M87$^{\ast }$ in 2019 and, subsequently, that…
View article: Analysis of the accuracy of GNSS inferred precipitable water vapour against that from a 210 GHz WVR at the H.E.S.S. site
Analysis of the accuracy of GNSS inferred precipitable water vapour against that from a 210 GHz WVR at the H.E.S.S. site Open
The High Energy Stereoscopic System (H.E.S.S.) site and the Gamsberg Mountain have been identified as potential sites for the Africa Millimetre Telescope (AMT). The AMT is poised to observe at millimetre and possibly at submillimetre wavel…
View article: Measurements of Precipitable Water Vapour for the Africa Millimetre Telescope
Measurements of Precipitable Water Vapour for the Africa Millimetre Telescope Open
Precipitable Water Vapour (PWV) is the main source of opacity in millimetre and sub-millimetre observations. Thus, before establishing a millimetre or sub-millimetre observatory, evaluating the PWV above the location is crucial. This paper…
View article: Monitoring the first candidate host for the merger of a Supermassive Black Hole Binary with H.E.S.S.
Monitoring the first candidate host for the merger of a Supermassive Black Hole Binary with H.E.S.S. Open
Supermassive black hole binary (SMBHB) is a result of galaxies coalescing, when two supermas- sive black holes form a hard binary with distances from kpc to pc. If the system reaches milliparsec separation, the black holes eventually merge…
View article: Galactic Centre with a Southern Wide Field-of-view Gamma-ray Observatory
Galactic Centre with a Southern Wide Field-of-view Gamma-ray Observatory Open
The Galactic Centre (GC) region is a highly interesting region for very high energy gamma-ray studies due to its proximity and diverse sources. It is also a unique place for Dark Matter (DM) searches, since we expect a large amount of DM i…
View article: H.E.S.S. follow-up observations of GRB 221009A
H.E.S.S. follow-up observations of GRB 221009A Open
GRB 221009A is the brightest gamma-ray burst ever detected. To probe the very-high-energy (VHE, >100 GeV) emission, the High Energy Stereoscopic System (H.E.S.S.) began observations 51.8 hours after the triggering event, when the brightnes…
View article: Searching for gamma-ray counterparts of FRBs with H.E.S.S.
Searching for gamma-ray counterparts of FRBs with H.E.S.S. Open
Fast Radio Bursts (FRBs) are highly energetic, extremely short-lived bursts of radio flashes.Despite extensive research, the exact cause of these outbursts remains a mystery. One of themost accredited models suggests that they originate fr…
View article: The Eta Carinae 2020 periastron passage as seen by H.E.S.S.
The Eta Carinae 2020 periastron passage as seen by H.E.S.S. Open
The binary system Eta Carinae is a unique laboratory to study particle acceleration up to very high energies (VHE) under a wide range of conditions. Particles are thought to be accelerated at shocks forming in the wind collision region. Et…
View article: Towards the second H.E.S.S. galactic plane catalogue
Towards the second H.E.S.S. galactic plane catalogue Open
The H.E.S.S. Galactic Plane Survey (HGPS), carried out between 2004 and 2013,\nis the most extensive survey of our Galaxy at very-high energies that covers\nthe southern sky. Since the first HPGS catalogue release, the new observations\nac…
View article: Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S.
Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S. Open
Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy gamma-ray emission around the pulsar has been detected by multiple water Cherenkov detector based instruments. How…
View article: H.E.S.S. Observations of the Gamma-ray Binary LMC P3
H.E.S.S. Observations of the Gamma-ray Binary LMC P3 Open
LMC P3 is a gamma-ray binary comprising of an unconfirmed compact object and an O-star and is located in the Large Magellanic Cloud. Initially discovered in Fermi-LAT data, it shows an orbital period of 10.3 days. H.E.S.S. has reported the…
View article: Probing the morphology of the low state gamma-ray emission of M87 with H.E.S.S.
Probing the morphology of the low state gamma-ray emission of M87 with H.E.S.S. Open
This work aims to study the very-high-energy (VHE; 100 GeV - 100 TeV) gamma-ray emission from M87, especially its low state emission, and probe a potential hadronic emission component in the inner Virgo Cluster. Probing a steady and extend…
View article: An updated view of the VHE gamma-ray sky around the stellar cluster Westerlund 2 with the H.E.S.S. experiment
An updated view of the VHE gamma-ray sky around the stellar cluster Westerlund 2 with the H.E.S.S. experiment Open
Since the last H.E.S.S. publication on the stellar cluster Westerlund 2 in 2011, the H.E.S.S. dataset on this region has increased more than three-fold in exposure to $\\sim220\\,$h of total observation time. By applying a novel approach t…
View article: Joint H.E.S.S. and Fermi-LAT analysis of the region around PSR J1813-1749
Joint H.E.S.S. and Fermi-LAT analysis of the region around PSR J1813-1749 Open
HESS J1813-178 is one of the brightest sources detected during the first HESS Galactic Plane survey. The compact source, also detected by MAGIC, is believed to be a pulsar wind nebula powered by one of the most powerful pulsars known in th…
View article: Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate
Evidence of 100 TeV γ-ray emission from HESS J1702-420: A new PeVatron candidate Open
The identification of active PeVatrons, hadronic particle accelerators reaching the knee of the cosmic-ray spectrum (at the energy of few PeV), is crucial to understand the origin of cosmic rays in the Galaxy. In this context, we report on…
View article: Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS
Combined dark matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS Open
Cosmological and astrophysical observations suggest that 85\% of the total matter of the Universe is made of Dark Matter (DM). However, its nature remains one of the most challenging and fundamental open questions of particle physics. Assu…
View article: Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S.
Search for dark matter annihilation signals from unidentified Fermi-LAT objects with H.E.S.S. Open
Cosmological N-body simulations show that Milky-Way-sized galaxies harbor a population of unmerged dark matter subhalos. These subhalos could shine in gamma rays and be eventually detected in gamma-ray surveys as unidentified sources. We s…
View article: Limits on primordial black hole evaporation from H.E.S.S. observations.
Limits on primordial black hole evaporation from H.E.S.S. observations. Open
Primordial Black Holes are expected to be formed in the early Universe by the gravitational collapse of overdense regions, among other mechanisms. They are also expected to loose their mass over time by the Hawking radiation process. As th…
View article: Search for TeV emission from the Fermi Bubbles at low Galactic latitudes with H.E.S.S. inner Galaxy survey
Search for TeV emission from the Fermi Bubbles at low Galactic latitudes with H.E.S.S. inner Galaxy survey Open
The Fermi Bubbles were discovered about a decade ago in the Fermi-LAT data as a double-lobe structure extending up to 55° in Galactic latitudes above and below the Galactic Center. At the moment their origin is still unknown. The H.E.S.S. …
View article: Is PKS 0625-354 another variable TeV active galactic nucleus?
Is PKS 0625-354 another variable TeV active galactic nucleus? Open
The majority of the active galactic nuclei (AGN) detected at very-high-energies above 100 GeV belong to the class of blazars with a small angle between the jet-axis and the line-of-sight. Only about 10 percent of the gamma-ray AGN are obje…
View article: H.E.S.S. ToO program on nearby core-collapse Supernovae : search for very-high energy gamma-ray emission towards the SN candidate AT2019krl in M74
H.E.S.S. ToO program on nearby core-collapse Supernovae : search for very-high energy gamma-ray emission towards the SN candidate AT2019krl in M74 Open
While the youngest known supernova remnants (SNRs), such as Cassiopeia A (Cas A), have been proven to be able to accelerate cosmic rays (CRs) only up to $\\sim$10$^{14}\\,\\mathrm{eV}$ at their present evolutionary stages, recent studies h…
View article: Detection of extended TeV emission around the Geminga pulsar with H.E.S.S.
Detection of extended TeV emission around the Geminga pulsar with H.E.S.S. Open
Highly extended gamma-ray emission around the Geminga pulsar was discovered by Milagro and verified by HAWC. Despite many observations with Imaging Atmospheric Cherenkov Telescopes (IACTs), detection of gamma-ray emission on angular scales…
View article: Search for enhanced TeV gamma ray emission from Giant Molecular Clouds using H.E.S.S.
Search for enhanced TeV gamma ray emission from Giant Molecular Clouds using H.E.S.S. Open
Cosmic Ray (CR) interactions with the dense gas inside Giant Molecular Clouds\n(GMCs) produce neutral pions, which in turn decay into gamma rays. Thus, the\ngamma ray emission from GMCs is a direct tracer of the cosmic ray density and\nthe…
View article: Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S.
Observation of burst activity from SGR1935+2154 associated to first galactic FRB with H.E.S.S. Open
Fast radio bursts (FRB) are enigmatic powerful single radio pulses with durations of several milliseconds and high brightness temperatures suggesting coherent emission mechanism. For the time being a number of extragalactic FRBs have been …
View article: Science verification of the new FlashCam-based camera in the 28m telescope of H.E.S.S.
Science verification of the new FlashCam-based camera in the 28m telescope of H.E.S.S. Open
In October 2019 the central 28 m telescope of the H.E.S.S. experiment has been upgraded with a new camera. The camera is based on the FlashCam design which has been developed in view of a possible future implementation in the medium-sized …
View article: Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey
Search for dark matter annihilation towards the inner Milky Way halo with the H.E.S.S. Inner Galaxy Survey Open
The presence of dark matter (DM) is suggested by a wealth of astrophysical and cosmological measurements. However, its underlying nature is yet unknown. Among the most promising candidates\nare weakly interacting massive particles (WIMPs):…
View article: Deep observations of Kepler's SNR with H.E.S.S.
Deep observations of Kepler's SNR with H.E.S.S. Open
Kepler’s supernova remnant (SNR) which is produced by the most recent naked-eye supernova in our Galaxy is one of the best studied SNRs, but its gamma-ray detection has eluded us so far. Observations with modern imaging atmospheric Cherenk…