Felicitas Pauss
A5100683009- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Medical Imaging Techniques and Applications
- Neutrino Physics Research
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Nuclear Physics and Applications
- Black Holes and Theoretical Physics
- CCD and CMOS Imaging Sensors
- Particle Accelerators and Free-Electron Lasers
- Astrophysical Phenomena and Observations
- International Science and Diplomacy
- Radiation Therapy and Dosimetry
- Advanced Optical Sensing Technologies
- Solar and Space Plasma Dynamics
- Astro and Planetary Science
ETH Zurich
2016-2025
Institute of Particle Physics
2024-2025
Institute of High Energy Physics
2021-2024
A. Alikhanyan National Laboratory
2022-2024
University of Antwerp
2024
TU Dortmund University
2017
University of Würzburg
2008-2016
Board of the Swiss Federal Institutes of Technology
1999-2008
Institute for High Energy Physics
2008
Universidad Complutense de Madrid
2008
The atmospheric Cherenkov gamma-ray telescope MAGIC, designed for a low-energy threshold, has detected very-high-energy gamma rays from giant flare of the distant Quasi-Stellar Radio Source (in short: radio quasar) 3C 279, at distance more than 5 billion light-years (a redshift 0.536). No quasar been observed previously in radiation, and this is also most object emitting above 50 gigaelectron volts. Because high-energy may be stopped by interacting with diffuse background light universe,...
The First G-APD Cherenkov Telescope (FACT) is designed to detect cosmic gamma-rays with energies from several hundred GeV up about 10 TeV using the Imaging Atmospheric Technique. In contrast former or existing telescopes, camera of FACT telescope comprised solid-state Geiger-mode Avalanche Photodiodes (G-APD) instead photomultiplier tubes for photo detection. It first full-scale device its kind employing this new technology. operated at Observatorio del Roque de los Muchachos (La Palma,...
We analyze the timing of photons observed by MAGIC telescope during a flare active galactic nucleus Mkn 501 for possible correlation with energy, as suggested some models quantum gravity (QG), which predict vacuum refractive index ≃1+(E/MQGn)n, n=1,2. Parametrizing delay between γ-rays different energies Δt=±τlE or Δt=±τqE2, we find τl=(0.030±0.012) s/GeV at 2.5-σ level, and τq=(3.71±2.57)×10−6 s/GeV2, respectively. use these results to establish lower limits MQG1>0.21×1018 GeV...
One fundamental question about pulsars concerns the mechanism of their pulsed electromagnetic emission. Measuring high-end region a pulsar's spectrum would shed light on this question. By developing new electronic trigger, we lowered threshold Major Atmospheric gamma-ray Imaging Cherenkov (MAGIC) telescope to 25 GeV. In configuration, detected gamma-rays from Crab pulsar that were greater than GeV, revealing relatively high cutoff energy in phase-averaged spectrum. This indicates emission...
The MAGIC collaboration has recently reported the discovery of γ-ray emission from binary system LS I +61°303 in TeV energy region. Here we present new observational results on this source range between 300 GeV and 3 TeV. In total, 112 hr data were taken 2006 September December covering four orbital cycles object. This large amount allowed us to produce an integral flux light curve for first time all phases +61°303. addition, also obtained a differential spectrum two phase bins 0.5 < ϕ 0.6...
We present the results from a multiwavelength campaign on TeV blazar 1ES 1959+650, performed in May, 2006. Data optical, UV, soft- and hard-X-ray very high energy (VHE) gamma-ray (E > 100 GeV) bands were obtained with SUZAKU SWIFT satellites, MAGIC telescope other ground based facilities. The source spectral distribution (SED), derived observations at end of May 2006, shows usual double hump shape, synchrotron peak higher flux level than Compton peak. With respect to historical values,...
We observed the first known very high energy (VHE) gamma-ray emitting unidentified source, TeV J2032+4130, for 94 hours with MAGIC telescope. The source was detected a significance of 5.6 sigma. flux, position, and angular extension are compatible previous ones measured by HEGRA telescope system five years ago. integral flux amounts to (4.5+-0.3stat+-0.35sys)x10^{-13} ph cm$^{-2}$ s$^{-1}$ above 1 TeV. spectrum, obtained lowest threshold date, is single power law hard photon index...
M87 is the only known non blazar radio galaxy to emit very high energy (VHE) gamma-rays. During a monitoring program of M87, rapid flare in VHE gamma-rays was detected by MAGIC telescope early 2008. The flux found be variable above 350 GeV on timescale as short 1 day at significance level $5.6σ$. highest measured reached 15% Crab Nebula flux. We observed several substantial changes during 13 observing period. lower energies (150 -- GeV), instead, compatible with being constant. spectrum can...
In a continuing study of the spectroscopy $b\overline{b}$ bound quark systems discovery lowest $P$-wave states by observation photons from decays $2^{3}S_{1}(b\overline{b})\ensuremath{\rightarrow}\ensuremath{\gamma}+1^{3}P_{J}(b\overline{b})$ and $1^{3}P_{J}(b\overline{b})\ensuremath{\rightarrow}\ensuremath{\gamma}+1^{3}S_{1}(b\overline{b})$ is reported. The are observed as narrow enhancements in inclusive photon spectrum ${\ensuremath{\Upsilon}}^{\ensuremath{'}}$ decays. center gravity...
The nearby dwarf spheroidal galaxy Draco, with its high mass to light ratio, is one of the most auspicious targets for indirect dark matter (DM) searches. Annihilation hypothetical DM particles can result in high-energy γ-rays, e.g., from neutralino annihilation supersymmetric framework. A search a possible signal originating Draco was performed MAGIC telescope during 2007. Analysis data results flux upper limit (2 σ) 1.1 × 10−11 photons cm−2 s−1 photon energies above 140 GeV, assuming...
The MAGIC telescope observed the region around distant blazar 3C 66A for 54.2 hr in 2007 August–December. observations resulted discovery of a γ-ray source centered at celestial coordinates R.A. = 2h23m12s and decl. 43°07 (MAGIC J0223+430), coinciding with nearby radio galaxy 66B. A possible association excess is discussed. energy spectrum J0223+430 follows power law normalization (1.7 ± 0.3stat 0.6syst) × 10−11 TeV−1 cm−2 s−1 300 GeV photon index Γ −3.10 0.31stat 0.2syst.
We present the results of first multiwavelength observing campaign on high-mass X-ray binary LS I +61 303 comprising observations at TeV regime with MAGIC telescope, along Chandra, and radio interferometric MERLIN, EVN VLBA arrays, in October November 2006. From our MERLIN observations, we can exclude existence large scale (~100 mas) persistent radio-jets. Our 5.0 GHz display morphological similarities to previous 8.4 carried out same orbital phase, suggesting a high level periodicity...
We present results of the multiwavelength campaign on TeV blazar Mkn 501 performed in 2006 July, including MAGIC for very-high-energy (VHE) γ-ray band and Suzaku X-ray band. A VHE signal was clearly detected with an average flux above 200 GeV ∼20% Crab Nebula flux, which indicates a low state source activity this energy range. No significant variability has been found during campaign. The spectrum can be described by simple power law from 80 to 2 photon index 2.8 ± 0.1, corresponds one...
We present the result of observation ultrafaint dwarf galaxy Willman 1 performed with 17 m MAGIC telescope during 15.5 hr between March and May 2008. No significant $\gamma$-ray emission was found. derived upper limits order $10^{-12}$ ph cm$^{-2}$ s$^{-1}$ on integral flux above 100 GeV, which we compare predictions from several established neutralino benchmark models in mSUGRA parameter space. The annihilation spectra are defined after including recently quantified contribution internal...
We have used the CUSB detector at Cornell Electron Storage Ring to study decays of $\ensuremath{\Upsilon}(1S)$ and $\ensuremath{\Upsilon}(3S)$ resonances into a single photon plus long-lived noninteracting particle. obtain an upper limit on branching ratio for $\ensuremath{\Upsilon}(1S)\ensuremath{\rightarrow}\ensuremath{\gamma}+X$, where $X$ is undetected. This 3.5\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}4}$ (90% C.L.) masses ${m}_{X}$ less than 7 GeV. For...