A5089222780- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Earthquake Detection and Analysis
- Ionosphere and magnetosphere dynamics
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Distributed and Parallel Computing Systems
- Atomic and Subatomic Physics Research
- earthquake and tectonic studies
- Black Holes and Theoretical Physics
- Radiation Therapy and Dosimetry
- Medical Imaging Techniques and Applications
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Pulsars and Gravitational Waves Research
- CCD and CMOS Imaging Sensors
- Radio Astronomy Observations and Technology
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2016-2025
University of Trento
2016-2025
Istituto Nazionale di Fisica Nucleare
2009-2025
University of California, Santa Cruz
2017-2024
Université Savoie Mont Blanc
2020-2024
Institut National de Physique Nucléaire et de Physique des Particules
2021-2024
Institute for High Energy Physics
2023-2024
Institute of Science and Technology
2023-2024
Atlas Scientific (United States)
2024
A. Alikhanyan National Laboratory
2024
The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach finding their origin. Locating the "knees" spectra important part and has yet to be achieved. Here we report a mixed Hydrogen Helium spectrum using combination ARGO-YBJ experiment prototype Cherenkov telescope LHAASO experiment. A knee feature at 640+/-87 TeV, with clear steepening spectrum, observed. This gives fundamental inputs galactic acceleration models.
The events recorded by ARGO-YBJ in more than five years of data collection have been analyzed to determine the diffuse gamma-ray emission Galactic plane at longitudes 25° < l 100° and latitudes . energy range covered this analysis, from ∼350 GeV ∼2 TeV, allows connection region explored Fermi with multi-TeV measurements carried out Milagro. Our analysis has focused on two selected regions plane, i.e., 40° 65° 85° (the Cygnus region), where Milagro observed an excess respect predictions...
The ARGO-YBJ detector is an extensive air shower array that has been used to monitor the northern $\gamma$-ray sky at energies above 0.3 TeV from 2007 November 2013 January. In this paper, we present results of a survey in declination band $-10^{\circ}$ $70^{\circ}$, using data recorded over past five years. With integrated sensitivity ranging 0.24 $\sim$1 Crab units depending on declination, six sources have detected with statistical significance greater than 5 standard deviations. Several...
Measuring the anisotropy of arrival direction distribution cosmic rays provides important information on propagation mechanisms and identification their sources. In fact, flux is thought to be dependent only due presence nearby ray sources or particular magnetic-field structures. Recently, observation unexpected excesses at TeV energy down an angular scale as narrow $\ensuremath{\sim}10\ifmmode^\circ\else\textdegree\fi{}$ raised possibility that problem origin Galactic may addressed by...
This paper reports on the measurement of large-scale anisotropy in distribution cosmic-ray arrival directions using data collected by air shower detector ARGO-YBJ from 2008 January to 2009 December, during minimum solar activity between cycles 23 and 24. In this period, more than 2 × 1011 showers were recorded with energies ∼1 30 TeV. The observed two-dimensional cosmic rays is characterized two wide regions excess deficit, respectively, both relative intensity ∼10−3 respect a uniform flux,...
Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called shadow). The shadow an important tool to determine performance of air shower array. Indeed, westward displacement center, due bending effect geomagnetic field on propagation cosmic rays, allows setting absolute rigidity scale primary particles inducing showers recorded detector. In addition, shape permits detector point spread function, while position at high energies evaluation pointing accuracy....
ARGO-YBJ is an air shower detector array with a fully covered layer of resistive plate chambers. It operated high duty cycle and large field view. continuously monitors the northern sky at energies above 0.3 TeV. In this paper, we report long-term monitoring Mrk 421 over period from 2007 November to 2010 February. This source was observed by satellite-borne experiments Rossi X-ray Timing Explorer Swift in band. especially active first half 2008. Many flares are both γ-ray bands...
As one of the brightest active blazars in both X-ray and very high energy $\gamma$-ray bands, Mrk 501 is useful for physics associated with jets from AGNs. The ARGO-YBJ experiment monitoring it $\gamma$-rays above 0.3 TeV since November 2007. Starting October 2011 largest flare 2005 observed, which lasts to about April 2012. In this paper, a detailed analysis reported. During flaring episodes 17 22, 2011, an excess event rate over 6 $\sigma$ detected by direction 501, corresponding increase...
The extended TeV gamma-ray source ARGO J2031+4157 (or MGRO J2031+41) is positionally consistent with the Cygnus Cocoon discovered by Fermi-LAT at GeV energies in superbubble. Reanalyzing ARGO-YBJ data collected from 2007 November to 2013 January, angular extension and energy spectrum of are evaluated. After subtracting contribution overlapping sources, excess map fitted a two-dimensional Gaussian function square region 10° × 10°, finding σext= 18 ± 05. observed differential dN/dE = (2.5 0.4)...
Abstract The China Seismo-Electromagnetic Satellite ( CSES ) aims to monitor electromagnetic, particle, and plasma perturbations in the iono-magnetosphere inner Van Allen radiation belts originated by electromagnetic sources external internal geomagnetic cavity, cosmic rays, solar events. In particular, objective of space mission is investigate lithosphere–atmosphere–ionosphere coupling mechanisms (including effects lightning, earthquakes, volcanoes, artificial emissions) that induce top...
Abstract High-energy, long gamma-ray bursts (GRBs) can be generated by the core collapse of massive stars at end their lives. When they happen in close-by universe exceptionally bright, as seen from Earth case recent, giant, long-lasting GRB221009A. GRB221009A was produced a collapsing star with redshift 0.152: this event observed many space experiments, which also detected an extraordinary afterglow. The large fluence prompt emission about 0.013 erg cm −2 illuminated geographical region...
The proton-air cross section in the energy range 1--100 TeV has been measured by ARGO-YBJ cosmic ray experiment. analysis is based on primary flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits detector capabilities of selecting shower development stage means hit multiplicity, density lateral profile measurements at ground. effects fluctuations, contribution heavier primaries uncertainties hadronic interaction models, have taken into account. results used to...
We report the observation of TeV gamma-rays from Cygnus region using ARGO-YBJ data collected 2007 November to 2011 August. Several sources are located in this including two bright extended MGRO J2019+37 and J2031+41. According Milagro set, at 20 is most significant source apart Crab Nebula. No signal detected by experiment, derived flux upper limits 90% confidence level for all events above 600 GeV with medium energy 3 lower than flux, implying that might be variable hard identified as a...
The ARGO-YBJ experiment detects extensive air showers in a wide energy range by means of full-coverage detector which is stable data taking its full configuration since November 2007 at the YBJ International Cosmic Ray Observatory (4300 m a.s.l., Tibet, People's Republic China). In this paper measurement light-component spectrum primary cosmic rays region $(5\textdiv{}200)\text{ }\text{ }\mathrm{TeV}$ reported. method exploited to analyze experimental based on Bayesian procedure. measured...
The ARGO-YBJ air shower detector monitored the Crab Nebula gamma ray emission from 2007 November to 2013 February. integrated signal, consisting of $\sim$3.3 $\times$ 10$^5$ events,reached statistical significance 21.1 standard deviations. obtained energy spectrum in range 0.3-20 TeV can be described by a power law function dN/dE = I$_0$ (E / 2 TeV)$^{-\alpha}$, with flux normalization (5.2 $\pm$ 0.2) 10$^{-12}$ photons cm$^{-2}$ s$^{-1}$ TeV$^{-1}$ and $\alpha$ 2.63 0.05, corresponding an...
Abstract This paper reports on the observation of sidereal large-scale anisotropy cosmic rays using data collected by ARGO-YBJ experiment over 5 years (2008–2012). analysis extends previous work limited to period from 2008 January 2009 December, near minimum solar activity between cycles 23 and 24. With new sample, cycle 24 maximum is investigated. A method used improve energy reconstruction, allowing us cover a much wider range, 4 520 TeV. Below 100 TeV, dominated two wide regions,...
Abstract The High-energy Particle Detector (HEPD) on board the China Seismo-Electromagnetic Satellite (CSES-01)—launched 2018 February 2—is a light and compact payload suitable for measuring electrons (3–100 MeV), protons (30–250 nuclei (up to few hundreds of MeV). Sun-synchronous orbit large acceptance allow HEPD measure cosmic-ray particles near ±65° latitude limit fair amount time per day. In this work, three semiannual galactic hydrogen energy spectra between ∼40 250 MeV are presented,...
Abstract In this work we present the High‐Energy Particle Detector (HEPD‐01) observations of proton fluxes from space during 28 October 2021 solar energetic particle event, which produced a ground‐level enhancement on Earth. The event was associated with major, long‐duration X1‐class flare and concomitant coronal mass ejection (CME) that erupted Active Region 12887. This is first direct measurement particles emitted current cycle, recorded by single instrument in energy range ∼50 MeV/n up to...
Abstract Time-dependent energy spectra of galactic cosmic rays (GCRs) carry crucial information regarding their origin and propagation throughout the interstellar environment. When observed at Earth, after traversing interplanetary medium, such are heavily affected by solar wind embedded magnetic field permeating inner sectors heliosphere. The activity Sun changes significantly over an 11 yr cycle—and so does effect on particles; this translates into a phenomenon called modulation. Moreover,...
The South Atlantic Anomaly (SAA) is a region where the Earth's magnetic field lower by factor of 2–3 with respect to mean value, resulting in remarkably higher density trapped charged particles. Updated surveys this unique are capital importance track evolution geomagnetic and improve models ionosphere. High-Energy Particle Detector (HEPD-01) on board China Seismo-Electromagnetic Satellite (CSES-01), operational between 24th 25th Solar cycles, one few instruments able probe radiation...
The ionosphere, a crucial interface between Earth&#8217;s atmosphere and space, demonstrates complex temporal dynamics influenced by both terrestrial extraterrestrial factors. This research investigates the potential of detecting precursors to seismic events analyzing transient phenomena within ionosphere. We utilized machine learning algorithms process analyze extensive VLF electromagnetic spectrum data gathered Demeter satellite over period from 2005 2010. During this five-year...