Main physics results of the ARGO-YBJ experiment

The ARGO-YBJ experiment has been in stable data taking for more than 5 years at the YangBaJing Cosmic Ray Observatory (Tibet, P. R. China, 4300 m a.s.l., 606 g/cm2). With a duty-cycle greater than 86%, the detector collected about 5 × 1011 events in a wide energy range, from few hundred GeV up to about 10 PeV. High altitude location and detector features make ARGO-YBJ capable of investigating a wide range of important issues in Cosmic Ray and Astroparticle Physics by imaging the front of atmospheric showers with unprecedented resolution and detail. In this paper, the main physics results in gamma-ray astronomy and in cosmic ray physics are summarized.

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ARGO-YBJ: Highlights and Prospects

Acta Polytechnica CTU Proceedings ◽

10.14311/app.2014.01.0151 ◽

2014 ◽

Vol 1 (1) ◽

pp. 151-156

Author(s):

Giuseppe Di Sciascio

Keyword(s):

Energy Range ◽

Duty Cycle ◽

Gamma Ray ◽

Cosmic Ray ◽

Wide Energy Range ◽

Chinese Community ◽

Open Problems ◽

Gamma Ray Astronomy ◽

Wide Energy

The ARGO-YBJ experiment has been in stable data taking for 5 years at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300 m a.s.l., 606 g/cm2). With a duty-cycle greater than 86% the detector collected about 51011 events in a wide energy range, from few hundreds GeV up to the PeV. A number of open problems in cosmic ray physics has been faced exploiting dierent analyses. In this paper we summarize the last results in gamma-ray astronomy and in the cosmic ray physics and introduce the LHAASO project, mainly driven by the Chinese community, to study the cosmic ray physics up to 1017 eV.

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ARGO-YBJ: STATUS AND HIGHLIGHTS

Acta Polytechnica ◽

10.14311/ap.2013.53.0646 ◽

2013 ◽

Vol 53 (A) ◽

pp. 646-651

Author(s):

Giuseppe Di Sciascio

Keyword(s):

Energy Range ◽

Gamma Ray ◽

Cosmic Ray ◽

Current Status ◽

Wide Energy Range ◽

Open Problems ◽

Direct Measurements ◽

Wide Energy ◽

First Time ◽

Gathering Data

The ARGO-YBJ experiment has been gathering data steadily since November 2007 at the YangBaJing Cosmic Ray Laboratory (Tibet, P.R. China, 4300m a.s.l., 606 g/cm2). ARGO-YBJ is confronting various open problems in Cosmic Ray (CR) physics. The search for CR sources is carried out by observing TeV gamma-ray sources, both galactic and extra-galactic. The CR spectrum, composition and anisotropy are measured in a wide energy range (TeV ÷ PeV), thus overlapping direct measurements for the first time. This paper summarizes the current status of the experiment and describes some of the scientific highlights since 2007.

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On the origin of the TeV gamma-ray emission from Cygnus X-3

EPJ Web of Conferences ◽

10.1051/epjconf/201920814008 ◽

2019 ◽

Vol 208 ◽

pp. 14008

Author(s):

V.G. Sinitsyna ◽

V.Y. Sinitsyna

Keyword(s):

Energy Range ◽

Particle Production ◽

Cosmic Ray ◽

High Energy ◽

Wide Energy Range ◽

Electromagnetic Spectrum ◽

Essential Information ◽

Wide Range ◽

Γ Ray ◽

Very High

Cygnus X-3 binary system is a famous object studied over the wide range of electromagnetic spectrum. Early detections of ultra-high energy gamma-rays from Cygnus X-3 by Kiel, Havera Park and then by Akeno triggered the construction of several large air shower detectors. Also, Cygnus X-3 has been proposed to be one of the most powerful sources of charged cosmic ray particles in the Galaxy. The results of twenty-year observations of the Cyg X-3 binary at energies 800 GeV - 85 TeV are presented with images, spectra during periods of flaring activity and at low flux periods. The correlation of TeV flux increases with flaring activity at the lower energy range of X-ray and radio emission from the relativistic jets of Cygnus X-3 is found as well as 4.8-hour orbital modulation of TeV γ-ray intensity. Detected modulation of TeV γ-ray emission with orbit and important characteristics of Cyg X-3 such as the high luminosity of the companion star and the close orbit leads to an efficient generation of γ-ray emission through inverse Compton scattering in this object. The different type variability of very high-energy γ-emission and correlation of radiation activity in the wide energy range can provide essential information on the mechanism of particle production up to very high energies.

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ARGO-YBJ EXPERIMENT RESULTS AND PROSPECTS IN LHAASO PROJECT

International Journal of Modern Physics Conference Series ◽

10.1142/s2010194512005867 ◽

2012 ◽

Vol 10 ◽

pp. 147-158 ◽

Cited By ~ 6

Author(s):

◽

MIN ZHA

Keyword(s):

Research And Development ◽

High Altitude ◽

Gamma Ray ◽

Solar Physics ◽

Experimental Studies ◽

Cosmic Ray ◽

Gamma Ray Astronomy ◽

Air Shower ◽

Future Extension

The ARGO-YBJ detector, a RPC carpet array at the high altitude of 4300 m has been stably operated since 2007. As a multi-purpose experiment the physics topics of ARGO-YBJ covers the VHE gamma-ray astronomy, cosmic ray physics and solar physics. Results of these experimental studies are reviewed. And as a future extension project, the Large High Altitude Air Shower Observatory (LHAASO) is introduced, some research and development of detectors are described.

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Observation of heavy cosmic-ray primaries over the wide energy range from ∼100 GeV/particle to ∼100 TeV/particle: Is the celebrated ‘‘knee’’ actually so prominent?

Physical Review D ◽

10.1103/physrevd.48.1949 ◽

1993 ◽

Vol 48 (5) ◽

pp. 1949-1975 ◽

Cited By ~ 77

Author(s):

Masakatsu Ichimura ◽

Masataka Kogawa ◽

Shuichi Kuramata ◽

Hiroyuki Mito ◽

Takayuki Murabayashi ◽

...

Keyword(s):

Energy Range ◽

Cosmic Ray ◽

Wide Energy Range ◽

Wide Energy

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Wide energy range gamma-ray calibration source

Journal of Instrumentation ◽

10.1088/1748-0221/6/11/t11002 ◽

2011 ◽

Vol 6 (11) ◽

pp. T11002-T11002 ◽

Cited By ~ 5

Author(s):

M Kroupa ◽

C Granja ◽

Z Janout ◽

M Kralik ◽

F Krejci ◽

...

Keyword(s):

Energy Range ◽

Gamma Ray ◽

Wide Energy Range ◽

Calibration Source ◽

Wide Energy

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Observation of heavy cosmic-ray primaries over the wide energy range from GeV/n to TeV/n

10.1063/1.43844 ◽

1993 ◽

Author(s):

Masakatsu Ichimura ◽

Masataka Kogawa ◽

Syuichi Kuramata ◽

Hideya Matsutani ◽

Hiroyuki Mito ◽

...

Keyword(s):

Energy Range ◽

Cosmic Ray ◽

Wide Energy Range ◽

Wide Energy

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THE PAMELA COSMIC RAY SPACE OBSERVATORY

International Journal of Modern Physics D ◽

10.1142/s021827181360002x ◽

2013 ◽

Vol 22 (11) ◽

pp. 1360002

Author(s):

◽

MARCO CASOLINO

Keyword(s):

Cosmic Rays ◽

Energy Range ◽

Neutron Detector ◽

Cosmic Ray ◽

Great Accuracy ◽

Wide Energy Range ◽

Space Observatory ◽

Wide Energy ◽

Scientific Results ◽

Trigger Mode

PAMELA is a satellite borne experiment designed to study with great accuracy cosmic rays of galactic, solar, and trapped nature in a wide energy range (protons: 80 MeV–700 GeV, electrons 50 MeV–400 GeV). Main objective is the study of the antimatter component: antiprotons (80 MeV–190 GeV), positrons (50 MeV–270 GeV) and search for antimatter with a precision of the order of 10-8). The experiment, housed on board the Russian Resurs-DK1 satellite, was launched on June, 15 2006 in a 350 × 600 km orbit with an inclination of 70 degrees. The detector is composed of a series of scintillator counters arranged at the extremities of a permanent magnet spectrometer to provide charge, Time-of-Flight and rigidity information. Lepton/hadron identification is performed by a Silicon-Tungsten calorimeter and a Neutron detector placed at the bottom of the device. An Anticounter system is used offline to reject false triggers coming from the satellite. In self-trigger mode the Calorimeter, the neutron detector and a shower tail catcher are capable of an independent measure of the lepton component up to 2 TeV. In this work we present some of its scientific results in its first five years of operation.

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