A5049571888- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Astronomical Observations and Instrumentation
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Particle physics theoretical and experimental studies
- Geophysics and Gravity Measurements
Friedrich-Alexander-Universität Erlangen-Nürnberg
2024
SS 433 is a microquasar, stellar binary system that launches collimated relativistic jets. We observed in gamma rays using the High Energy Stereoscopic System (H.E.S.S.) and found an energy-dependent shift apparent position of gamma-ray emission from parsec-scale These observations trace energetic electron population indicate inverse Compton scattering mechanism rays. Our modeling morphology constrains location particle acceleration requires abrupt deceleration jet flow. infer presence...
Abstract With their wide field of view and high duty cycle, water-Cherenkov-based observatories are integral to studying the very high-energy gamma-ray sky. For observations, precise event reconstruction highly effective background rejection crucial have been continuously improving in recent years. In this work, we investigate application graph neural networks (GNNs) energy benchmark performance against state-of-the-art methods. our simulation study, find that GNNs outperform hand-designed...
The Crab Nebula is a unique laboratory for studying the acceleration of electrons and positrons through their non-thermal radiation. Observations very-high-energy γ rays from have provided important constraints modelling its broadband emission. We present first fully self-consistent analysis Nebula’s -ray emission between 1 GeV ∼100 TeV, that is, over five orders magnitude in energy. Using open-source software package G AMMAPY , we combined 11.4 yr data Fermi Large Area Telescope 80 h High...
Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons positrons (CRe) at very high energies probe local accelerators provide constraints on exotic production mechanisms such as annihilation of dark matter particles. We present a high-statistics measurement the spectrum CRe candidate events from 0.3 40 TeV with High Energy Stereoscopic System, covering 2 orders magnitude in energy reaching proton rejection power better than 10^{4}. The measured is...
Context . HESS J1813–178 is a very-high-energy γ -ray source spatially coincident with the young and energetic pulsar PSR J1813–1749 thought to be associated its wind nebula (PWN). Recently, evidence for extended high-energy emission in vicinity of has been revealed Fermi Large Area Telescope (LAT) data. This motivates revisiting region, taking advantage improved analysis methods an dataset. Aims Using data taken by High Energy Stereoscopic System (H.E.S.S.) experiment -LAT, we aim describe...
Owing to their rapid cooling rate and hence loss-limited propagation distance, cosmic-ray electrons positrons (CRe) at very high energies probe local accelerators provide constraints on exotic production mechanisms such as annihilation of dark matter particles. We present a high-statistics measurement the spectrum CRe candidate events from 0.3 40 TeV with High Energy Stereoscopic System (H.E.S.S.), covering two orders magnitude in energy reaching proton rejection power better than $10^{4}$....
Context. HESS J1809$-$193 is an unassociated very-high-energy $γ$-ray source located on the Galactic plane. While it has been connected to nebula of energetic pulsar PSR J1809$-$1917, supernova remnants and molecular clouds present in vicinity also constitute possible associations. Recently, detection emission up energies $\sim$100 TeV with HAWC observatory led renewed interest J1809$-$193. Aims. We aim understand origin Methods. analysed 93.2 h data taken above 0.27 High Energy Stereoscopic...
Primordial Black Holes (PBHs) are hypothetical black holes predicted to have been formed from density fluctuations in the early Universe. PBHs with an initial mass around $10^{14}-10^{15}$g expected end their evaporation at present times a burst of particles and very-high-energy (VHE) gamma rays. Those rays may be detectable by High Energy Stereoscopic System (H.E.S.S.), array imaging atmospheric Cherenkov telescopes. This paper reports on search for bursts VHE H.E.S.S., ranging 10 120...