Cornelia Arcaro
A5064242206- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Neutrino Physics Research
- Particle Detector Development and Performance
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Radiation Detection and Scintillator Technologies
- Noncommutative and Quantum Gravity Theories
- Gyrotron and Vacuum Electronics Research
- Stellar, planetary, and galactic studies
- Black Holes and Theoretical Physics
- Galaxies: Formation, Evolution, Phenomena
- Precipitation Measurement and Analysis
- Terahertz technology and applications
- Computational Physics and Python Applications
- Radioactivity and Radon Measurements
- High-Energy Particle Collisions Research
- Atmospheric Ozone and Climate
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2016-2025
University of Padua
2016-2024
Universitat de Barcelona
2021-2024
Institut d'Estudis Espacials de Catalunya
2024
North-West University
2018-2023
AGH University of Krakow
2023
Durham University
2023
Georgia Institute of Technology
2023
University of Turku
2021-2023
Niels Brock
2023
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...
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...
The ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana) Project led by the Italian National Institute for Astrophysics (INAF) is developing and will deploy at Observatorio del Teide mini-array (ASTRI Mini-Array) composed of nine telescopes similar to small-size dual-mirror Schwarzschild-Couder telescope (ASTRI-Horn) currently operating on slopes Mt. Etna in Sicily. Mini-Array surpass current Cherenkov array differential sensitivity above few tera-electronvolt (TeV), extending...
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.
Aims: We present a detailed view of the pulsar wind nebula (PWN) HESS J1825-137. aim to constrain mechanisms dominating particle transport within nebula, accounting for its anomalously large size and spectral characteristics. Methods: The is studied using deep exposure from over 12 years H.E.S.S. I operation, together with data II improving low energy sensitivity. Enhanced energy-dependent morphological spatially-resolved analyses probe Very High Energy (VHE, E > 0.1 TeV) gamma-ray...
Aims. We aim to characterize the multiwavelength emission from Markarian 501 (Mrk 501), quantify energy-dependent variability, study potential multiband correlations, and describe temporal evolution of broadband within leptonic theoretical scenarios. Methods. organized a campaign take place between March July 2012. Excellent coverage was obtained with more than 25 instruments, including MAGIC, FACT VERITAS Cherenkov telescopes, instruments on board Swift Fermi spacecraft, telescopes operated...
The blazar Mrk 501 (z=0.034) was observed at very-high-energy (VHE, $E\gtrsim 100$~GeV) gamma-ray wavelengths during a bright flare on the night of 2014 June 23-24 (MJD 56832) with H.E.S.S. phase-II array Cherenkov telescopes. Data taken that by large zenith angle reveal an exceptional number photons multi-TeV energies, rapid flux variability and energy coverage extending significantly up to 20 TeV. This data set is used constrain Lorentz invariance violation (LIV) using two independent...
Dwarf spheroidal galaxy satellites of the Milky Way are prime targets for indirect detection dark matter with gamma rays due to their proximity, high content, and absence nonthermal emission processes. Recently, Dark Energy Survey (DES) revealed existence new ultrafaint dwarf galaxies in southern-hemisphere sky, therefore ideally located ground-based observations imaging atmospheric Cherenkov telescope array H.E.S.S. We present a search very-high-energy ($E\ensuremath{\gtrsim}100\text{...
Abstract We study the broadband emission of Mrk 501 using multiwavelength observations from 2017 to 2020 performed with a multitude instruments, involving, among others, MAGIC, Fermi's Large Area Telescope (LAT), NuSTAR, Swift, GASP-WEBT, and Owens Valley Radio Observatory. showed an extremely low activity, which may help unravel its baseline emission. Nonetheless, significant flux variations are detected at all wave bands, highest occurring X-rays very-high-energy (VHE) γ -rays. A...
Dwarf spheroidal galaxies are among the most promising targets for detecting signals of Dark Matter (DM) annihilations. The H.E.S.S. experiment has observed five these systems a total about 130 hours. data re-analyzed here, and, in absence any detected signals, interpreted terms limits on DM annihilation cross section. Two scenarios considered: i) into mono-energetic gamma-rays and ii) form pure WIMP multiplets that, annihilating all electroweak bosons, produce distinctive gamma-ray spectral...
Context. NGC 253 is one of only two starburst galaxies found to emit γ -rays from hundreds MeV multi-TeV energies. Accurate measurements the very-high-energy (VHE; E > 100 GeV) and high-energy (HE; 60 MeV) spectra are crucial study underlying particle accelerators, probe dominant emission mechanism(s) cosmic-ray interaction transport. Aims. The measurement VHE -ray published in 2012 by H.E.S.S. was limited large systematic uncertainties. Here, most up date spectrum investigated both HE...
Fast radio bursts (FRBs) are bright flashes observed typically at GHz frequencies with millisecond duration, whose origin is likely extragalactic. Their nature remains mysterious, motivating searches for counterparts other wavelengths. FRB 121102 so far the only source known to repeatedly emit FRBs and associated a host galaxy redshift |$z$| ≃ 0.193. We conducted simultaneous observations of Arecibo MAGIC telescopes during several epochs in 2016–2017. This allowed time-scale burst emission...
Cosmological and astrophysical observations suggest that 85% of the total matter Universe is made Dark Matter (DM). However, its nature remains one most challenging fundamental open questions particle physics. Assuming DM, this exotic form cannot consist Standard Model (SM) particles. Many models have been developed to attempt unraveling DM such as Weakly Interacting Massive Particles (WIMPs), favored candidates. WIMP annihilations decay could produce SM particles which in turn hadronize...
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 Approximately one hundred sources of very-high-energy (VHE) gamma rays are known in the Milky Way, detected with a combination targeted observations and surveys. A survey entire Galactic Plane energy range from few tens GeV to TeV has been proposed as Key Science Project for upcoming Cherenkov Telescope Array Observatory (CTAO). This article presents status studies towards Survey (GPS). We build make publicly available sky model that combines data recent gamma-ray emitters...
Aims. We report on the measurement and investigation of pulsed high-energy γ -ray emission from Vela pulsar, PSR B0833−45, based observations with largest telescope H.E.S.S., CT5, in monoscopic mode, data obtained Fermi -LAT. Methods. Data 40.3 h carried out H.E.S.S. II array 2013 to 2015 have been used. A dedicated very low-threshold event reconstruction analysis pipeline was developed achieve lowest possible energy threshold. Eight years -LAT were analysed also used as reference validate...
We report on the detection of flaring activity from Fanaroff-Riley I radio galaxy NGC 1275 in very-high-energy (VHE, E $>$ 100 GeV) gamma rays with MAGIC telescopes. Observations were performed between 2016 September and 2017 February as part a monitoring program. The brightest outburst $\sim1.5$ times Crab Nebula flux above GeV (C.U.) was observed during night December 31 January 1 (fifty higher than mean previously measured two observational campaigns 2009 2011). Significant variability...
Context . The BL Lac object S5 0716+714, a highly variable blazar, underwent an impressive outburst in January 2015 (Phase A), followed by minor activity February B). MAGIC observations were triggered the optical flux observed Phase A, corresponding to brightest ever reported state of source R -band. Aims .The comprehensive dataset collected is investigated order shed light on mechanism broadband emission. Methods Multi-wavelength curves have been studied together with spectral energy...
Spontaneous breaking of Lorentz symmetry at energies on the order Planck energy or lower is predicted by many quantum gravity theories, implying non-trivial dispersion relations for photon in vacuum. Consequently, gamma-rays different energies, emitted simultaneously from astrophysical sources, could accumulate measurable differences their time flight until they reach Earth. Such tests have been carried out past using fast variations gamma-ray flux pulsars, and more recently active galactic...