F. Di Pierro
A5064457923- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- High-Energy Particle Collisions Research
- Radiation Therapy and Dosimetry
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Cosmology and Gravitation Theories
- Precipitation Measurement and Analysis
- Electromagnetic Compatibility and Measurements
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Radio Wave Propagation Studies
- Particle accelerators and beam dynamics
- Noncommutative and Quantum Gravity Theories
- Adaptive optics and wavefront sensing
- Ionosphere and magnetosphere dynamics
University of Turin
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2014-2024
Institute for Cosmic Ray Research
2023
Max Planck Institute for Physics
2023
Istituto Nazionale di Fisica Nucleare
2018-2022
MAGIC Telescopes
2022
Universidad Nacional Autónoma de México
2021
Campbell Collaboration
2013-2021
University of Perugia
2021
Columbia University
2021
We present the first joint analysis of gamma-ray data from MAGIC Cherenkov telescopes and Fermi Large Area Telescope (LAT) to search for signals dark matter annihilation in dwarf satellite galaxies. combine 158 hours Segue 1 observations with 6-year 15 galaxies by -LAT. obtain limits on cross-section particle masses between 10 GeV 100 TeV—the widest mass range ever explored a single analysis. These improve previously published -LAT results up factor two at certain masses. Our new inclusive...
The Cherenkov Telescopes Array (CTA) is planned as the future instrument for very-high-energy (VHE) gamma-ray astronomy with a wide energy range of four orders magnitude and an improvement in sensitivity compared to current instruments about order magnitude. Monte Carlo simulations are crucial tool design CTA. ultimate goal these find most cost-effective solution given physics goals thus or find, cost, best suited different types targets Apart from uncertain component cost estimates, main...
Abstract A neutrino with energy ∼290 TeV, IceCube-170922A, was detected in coincidence the BL Lac object TXS 0506+056 during enhanced gamma-ray activity, chance being rejected at ∼3 σ level. We monitored very-high-energy (VHE) band Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes for ∼41 hr from 1.3 to 40.4 days after detection. Day-timescale variability is clearly resolved. interpret quasi-simultaneous and broadband electromagnetic observations a novel one-zone...
We report the observation of a steepening in cosmic ray energy spectrum heavy primary particles at about 8×10(16) eV. This structure is also seen all-particle spectrum, but less significant. Whereas "knee" 3-5×10(15) eV was assigned to light masses by KASCADE experiment, new found KASCADE-Grande experiment caused primaries. The result obtained independent measurements charged particle and muon components secondary extensive air showers range 10(16) 10(18) data are analyzed on single-event...
Aims. We investigate the extension of very high-energy spectral tail Crab Pulsar at energies above 400 GeV.
Recent results of the KASCADE-Grande experiment provided evidence for a mild knee-like structure in all-particle spectrum cosmic rays at $E={10}^{16.92\ifmmode\pm\else\textpm\fi{}0.10}\text{ }\text{ }\mathrm{eV}$, which was found to be due steepening flux heavy primary particles. The combined components light and intermediate masses compatible with single power law energy range from ${10}^{16.3}$ ${10}^{18}\text{ }\mathrm{eV}$. In this paper, we present an update analysis by using data...
It is widely believed that the bulk of Galactic cosmic rays are accelerated in supernova remnants (SNRs). However, no observational evidence presence particles PeV energies SNRs has yet been found. The young historical SNR Cassiopeia A (Cas A) appears as one best candidates to study acceleration processes. Between December 2014 and October 2016 we observed Cas with MAGIC telescopes, accumulating 158 hours good-quality data. We derived spectrum source from 100 GeV 10 TeV. also analysed...
We present a measurement of the extragalactic background light (EBL) based on joint likelihood analysis 32 gamma-ray spectra for 12 blazars in redshift range z = 0.03 to 0.944, obtained by MAGIC telescopes and Fermi-LAT. The EBL is part diffuse radiation spanning ultraviolet, visible infrared bands. Major contributors are emitted stars through history universe, fraction it which was absorbed dust galaxies re-emitted at longer wavelengths. can be studied indirectly its effect very-high energy...
On January 14, 2019, the Major Atmospheric Gamma Imaging Cherenkov telescopes detected GRB 190114C above 0.2 TeV, recording most energetic photons ever observed from a gamma-ray burst. We use this unique observation to probe an energy dependence of speed light in vacuo for as predicted by several quantum gravity models. Based on set assumptions possible intrinsic spectral and temporal evolution, we obtain competitive lower limits quadratic leading order modification.
Abstract The Cherenkov Telescope Array (CTA) is a next-generation ground-based observatory for gamma-ray astronomy at very high energies. Large-Sized prototype (LST-1) located the CTA-North site, on Canary Island of La Palma. LSTs are designed to provide optimal performance in lowest part energy range covered by CTA, down ≃20 GeV. LST-1 started performing astronomical observations 2019 November, during its commissioning phase, and it has been taking data ever since. We present first Crab...
Abstract Observations of linear polarization in the 2–8 keV energy range with Imaging X-ray Polarimetry Explorer (IXPE) explore magnetic field geometry and dynamics regions generating nonthermal radiation relativistic jets blazars. These jets, particularly blazars whose spectral distribution peaks at energies, emit X-rays via synchrotron from high-energy particles within jet. IXPE observations X-ray-selected BL Lac–type blazar 1ES 1959+650 on 2022 May 3–4 showed a significant degree Π x =...
ABSTRACT In recent years, a new generation of optical intensity interferometers has emerged, leveraging the existing infrastructure Imaging Atmospheric Cherenkov Telescopes (IACTs). The MAGIC telescopes host MAGIC-SII system (Stellar Intensity Interferometer), implemented to investigate feasibility and potential this technique on IACTs. After first successful measurements in 2019, was upgraded now features real-time, dead-time-free, 4-channel, GPU-based correlator. These hardware...
Context. QSO B0218+357 is a gravitationally lensed blazar located at redshift of 0.944. The gravitational lensing splits the emitted radiation into two components that are spatially indistinguishable by gamma-ray instruments, but separated 10–12 day delay. In July 2014, experienced violent flare observed Fermi-LAT and followed MAGIC telescopes.
KASCADE and KASCADE-Grande were multi-detector installations to measure individual air showers of cosmic rays at ultra-high energy. Based on data sets measured by KASCADE-Grande, 90% C.L. upper limits the flux gamma-rays in primary ray are determined an energy range ${10}^{14} - {10}^{18}$ eV. The analysis is performed selecting with a low muon content as expected for gamma-ray-induced compared induced energetic nuclei. best limit fraction total obtained $3.7 \times {10}^{15}$ eV $1.1...
LOPES is a digital radio interferometer located at Karlsruhe Institute of Technology (KIT), Germany, that measures emission from extensive air showers MHz frequencies in coincidence with KASCADE-Grande. In this article, we explore method (slope method) leverages the slope measured lateral distribution to reconstruct crucial attributes primary cosmic rays. First, present an investigation on basis pure simulations. Second, directly apply measurements. Applying simulations, obtain uncertainties...
The coincident detection of GW170817 in gravitational waves and electromagnetic radiation spanning the radio to MeV gamma-ray bands provided first direct evidence that short bursts (GRBs) can originate from binary neutron star (BNS) mergers. On other hand, properties GRBs high-energy gamma rays are still poorly constrained, with only $\sim$20 events detected GeV band, none TeV band. GRB~160821B is one nearest known at $z=0.162$. Recent analyses multiwavelength observational data its...
Linelike features in TeV γ rays constitute a "smoking gun" for TeV-scale particle dark matter and new physics. Probing the Galactic Center region with ground-based Cherenkov telescopes enables search spectral immediate association dense reservoir at sensitivity out of reach satellite γ-ray detectors, direct detection collider experiments. We report on 223 hours observations MAGIC stereoscopic telescope system reaching energies up to 100 TeV. improved lines high using large-zenith-angle novel...
Abstract We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude instruments, involving, among others, MAGIC, Fermi's Large Area Telescope (LAT), NuSTAR, Swift, GASP-WEBT, and Owens Valley Radio Observatory. showed an extremely low activity, which may help unravel its baseline emission. Nonetheless, significant flux variations are detected at all wave bands, highest occurring X-rays very-high-energy (VHE) γ -rays. A...