Alison Mitchell
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View article: Analysis of the supernova remnant IC 443 using H.E.S.S. data
Analysis of the supernova remnant IC 443 using H.E.S.S. data Open
View article: Non-thermal emission from local young massive stellar clusters and detection prospects with current and next generation instruments
Non-thermal emission from local young massive stellar clusters and detection prospects with current and next generation instruments Open
View article: Intensity Interferometry prospects with the CTAO
Intensity Interferometry prospects with the CTAO Open
View article: Hadronic emission from the environment of the Crab Pulsar Wind Nebula by re-accelerated particles
Hadronic emission from the environment of the Crab Pulsar Wind Nebula by re-accelerated particles Open
Context. The observation of peta-electronvolt (PeV) γ -ray photons from the Crab Nebula by the Large High Altitude Air Shower Observatory (LHAASO) has revitalised the possibility of a secondary population of hadrons producing the highest e…
View article: Detectability of Supernova remnants with the Southern Wide-field Gamma-ray Observatory
Detectability of Supernova remnants with the Southern Wide-field Gamma-ray Observatory Open
Supernova remnants (SNRs) are likely sources of hadronic particle acceleration within our galaxy, contributing to the galactic cosmic ray flux. Next-generation instruments, such as the Southern Wide-field Gamma-ray Observatory (SWGO), will…
View article: Detection of Molecular Clouds in the PeVatron Candidate Source LHAASO J0341+5258 by the Nobeyama 45-m Radio Telescope
Detection of Molecular Clouds in the PeVatron Candidate Source LHAASO J0341+5258 by the Nobeyama 45-m Radio Telescope Open
We report a new CO observation survey of LHAASO J0341+5258, using the Nobeyama Radio Observatory 45-m telescope. LHAASO J0341+5258 is one of the unidentified ultra-high-energy (UHE; E > 100 TeV) gamma-ray sources detected by LHAASO. Our CO…
View article: The H.E.S.S. extragalactic sky survey with the first decade of observations
The H.E.S.S. extragalactic sky survey with the first decade of observations Open
The results of the first extragalactic gamma-ray survey by the High Energy Stereoscopic System (H.E.S.S.) are presented. The survey comprises 2720 hours of very high-energy gamma-ray observations of the extragalactic sky, recorded with H.E…
View article: Deriving pulsar pair-production multiplicities from pulsar wind nebulae using H.E.S.S. and LHAASO observations
Deriving pulsar pair-production multiplicities from pulsar wind nebulae using H.E.S.S. and LHAASO observations Open
Context . Pulsar wind nebulae (PWNe) dominate the galactic gamma-ray sky at very high energies and they are major contributors to the leptonic cosmic ray flux. However, the question of whether or not pulsars also accelerate ions to compara…
View article: Simultaneous two-colour intensity interferometry with H.E.S.S
Simultaneous two-colour intensity interferometry with H.E.S.S Open
In recent years, intensity interferometry has been successfully applied to the Imaging Atmospheric Cherenkov Telescopes, H.E.S.S. , MAGIC, and VERITAS. All three telescope systems have proven the feasibility and capability of this method. …
View article: A background-estimation technique for the detection of extended gamma-ray structures with IACTs
A background-estimation technique for the detection of extended gamma-ray structures with IACTs Open
Estimation of the amount of cosmic-ray induced background events is a challenging task for Imaging Atmospheric Cherenkov Telescopes (IACTs). Most approaches rely on a model of the background signal derived from archival observations, which…
View article: Very-high-energy γ-Ray Emission from Young Massive Star Clusters in the Large Magellanic Cloud
Very-high-energy γ-Ray Emission from Young Massive Star Clusters in the Large Magellanic Cloud Open
The Tarantula Nebula in the Large Magellanic Cloud is known for its high star formation activity. At its center lies the young massive star cluster R136, providing a significant amount of the energy that makes the nebula shine so brightly …
View article: Mass and wind luminosity of young Galactic open clusters in <i>Gaia</i> DR2
Mass and wind luminosity of young Galactic open clusters in <i>Gaia</i> DR2 Open
Context. Star clusters constitute a significant part of the stellar population in our Galaxy. The feedback processes they exert on the interstellar medium impact multiple physical processes from the chemical to the dynamical evolution of t…
View article: Unveiling extended gamma-ray emission around HESS J1813-178
Unveiling extended gamma-ray emission around HESS J1813-178 Open
Context . HESS J1813–178 is a very-high-energy γ -ray source spatially coincident with the young and energetic pulsar PSR J1813–1749 and thought to be associated with its pulsar wind nebula (PWN). Recently, evidence for extended high-energ…
View article: Multi-view Deep Learning for Imaging Atmospheric Cherenkov Telescopes
Multi-view Deep Learning for Imaging Atmospheric Cherenkov Telescopes Open
This research note concerns the application of deep-learning-based multi-view-imaging techniques to data from the High Energy Stereoscopic System Imaging Atmospheric Cherenkov Telescope array. We find that the earlier the fusion of layer i…
View article: Probing Stellar Clusters from Gaia DR2 as Galactic PeVatrons: I -- Expected Gamma-ray and Neutrino Emission
Probing Stellar Clusters from Gaia DR2 as Galactic PeVatrons: I -- Expected Gamma-ray and Neutrino Emission Open
Young & massive stellar clusters (SCs) are a potential source of galactic cosmic rays up to very high energies as a result of two possible acceleration scenarios. Collective stellar winds from massive member stars form a wind-blown bubble …
View article: Spectrum and extension of the inverse-Compton emission of the Crab Nebula from a combined <i>Fermi</i>-LAT and H.E.S.S. analysis
Spectrum and extension of the inverse-Compton emission of the Crab Nebula from a combined <i>Fermi</i>-LAT and H.E.S.S. analysis Open
The Crab Nebula is a unique laboratory for studying the acceleration of electrons and positrons through their non-thermal radiation. Observations of very-high-energy γ rays from the Crab Nebula have provided important constraints for model…
View article: TeV flaring activity of the AGN PKS 0625–354 in November 2018
TeV flaring activity of the AGN PKS 0625–354 in November 2018 Open
Most γ -ray detected active galactic nuclei are blazars with one of their relativistic jets pointing towards the Earth. Only a few objects belong to the class of radio galaxies or misaligned blazars. Here, we investigate the nature of the …
View article: Evidence for <i>γ</i>-ray emission from the remnant of Kepler’s supernova based on deep H.E.S.S. observations <i>(Corrigendum)</i>
Evidence for <i>γ</i>-ray emission from the remnant of Kepler’s supernova based on deep H.E.S.S. observations <i>(Corrigendum)</i> Open
International audience
View article: Curvature in the very-high energy gamma-ray spectrum of M 87
Curvature in the very-high energy gamma-ray spectrum of M 87 Open
The radio galaxy M 87 is a variable very-high energy (VHE) gamma-ray source, exhibiting three major flares, which were reported in 2005, 2008, and 2010. Despite extensive studies, the origin of the VHE gamma-ray emission is not yet fully u…
View article: Spectrum and extension of the inverse-Compton emission of the Crab Nebula from a combined Fermi-LAT and H.E.S.S. analysis
Spectrum and extension of the inverse-Compton emission of the Crab Nebula from a combined Fermi-LAT and H.E.S.S. analysis Open
The Crab Nebula is a unique laboratory for studying the acceleration of electrons and positrons through their non-thermal radiation. Observations of very-high-energy $\gamma$ rays from the Crab Nebula have provided important constraints fo…
View article: LHAASO J2108+5157 as a molecular cloud illuminated by a supernova remnant
LHAASO J2108+5157 as a molecular cloud illuminated by a supernova remnant Open
Context . The search for Galactic PeVatrons – astrophysical accelerators of cosmic rays to PeV energies – has entered a new phase in recent years with the discovery of the first ultra-high-energy (UHE, E > 100 TeV) γ -ray sources by the Hi…
View article: Mass and wind luminosity of young Galactic open clusters in Gaia DR2
Mass and wind luminosity of young Galactic open clusters in Gaia DR2 Open
Context. Star clusters constitute a significant part of the stellar population in our Galaxy. The feedback processes they exert on the interstellar medium impact multiple physical processes from the chemical to the dynamical evolution of t…
View article: Author Correction: Discovery of a radiation component from the Vela pulsar reaching 20 teraelectronvolts
Author Correction: Discovery of a radiation component from the Vela pulsar reaching 20 teraelectronvolts Open
View article: LHAASO J2108+5157 as a Molecular Cloud Illuminated by a Supernova Remnant
LHAASO J2108+5157 as a Molecular Cloud Illuminated by a Supernova Remnant Open
The search for Galactic PeVatrons - astrophysical accelerators of cosmic rays to PeV energies - has entered a new phase in recent years with the discovery of the first Ultra-High-Energy (UHE, $E>100$ TeV) gamma-ray sources by the HAWC and …
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: Impact of satellite trails on H.E.S.S. astronomical observations
Impact of satellite trails on H.E.S.S. astronomical observations Open
Context. The number of satellites launched into Earth’s orbit has almost tripled in the last three years (to over 4000) due to the increasing commercialisation of space. Multiple satellite constellations, consisting of over 400 000 individ…
View article: The Influence of Satellite Trails on H.E.S.S. Gamma-Ray Astronomical Observations
The Influence of Satellite Trails on H.E.S.S. Gamma-Ray Astronomical Observations Open
The number of satellites launched into low earth orbit has almost tripled (to over 4000) in the last three years due to the increasing commercialisation of space. Satellite constellations with a total of over 400,000 satellites are propose…
View article: The Vanishing of the Primary Emission Region in PKS 1510–089
The Vanishing of the Primary Emission Region in PKS 1510–089 Open
In 2021 July, PKS 1510−089 exhibited a significant flux drop in the high-energy γ -ray (by a factor 10) and optical (by a factor 5) bands and remained in this low state throughout 2022. Similarly, the optical polarization in the source van…
View article: Hadronic re-acceleration at the Crab pulsar wind termination shock as a source of PeV gamma-rays
Hadronic re-acceleration at the Crab pulsar wind termination shock as a source of PeV gamma-rays Open
Recent results from LHAASO and Tibet AS$\\gamma$ suggest that the Crab Nebula’s gamma-ray spectrum extends to the PeV energy range, however the production mechanisms of this highest energy emission remain unclear. It has been postulated th…
View article: The Influence of Satellite Trails on H.E.S.S. Gamma-Ray Astronomical Observations
The Influence of Satellite Trails on H.E.S.S. Gamma-Ray Astronomical Observations Open
The number of satellites launched into low earth orbit has almost tripled (to over 4000) in the last three years due to the increasing commercialisation of space. Satellite constellations with a total of over 400,000 satellites are propose…