scholarly journals Improving H.E.S.S. cosmic-ray background rejection by means of a new Gamma-Ray Air Shower Parametrisation (GRASP)

2016 ◽  
Author(s):  
Andreas Hillert ◽  
Francois Brun ◽  
Robert D. Parsons
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
Background Rejection ◽  
Air Shower

scholarly journals Molecular Clouds Observed by the EGRET Gamma-Ray Telescope

1997 ◽  
Vol 170 ◽  
pp. 22-24 ◽  
Author(s):  
Seth. W. Digel ◽  
Stanley D. Hunter ◽  
Reshmi Mukherjee ◽  
Eugéne J. de Geus ◽  
Isabelle A. Grenier ◽  
...  
Keyword(s):  
Molecular Mass ◽  
Molecular Clouds ◽  
Gamma Ray ◽  
Angular Resolution ◽  
Cosmic Ray ◽  
High Energy ◽  
Background Rejection ◽  
Γ Rays ◽  
Γ Ray ◽  
Production Mechanisms

EGRET, the high-energy γ-ray telescope on the Compton Gamma-Ray Observatory, has the sensitivity, angular resolution, and background rejection necessary to study diffuse γ-ray emission from the interstellar medium (ISM). High-energy γ rays produced in cosmic-ray (CR) interactions in the ISM can be used to determine the CR density and calibrate the CO line as a tracer of molecular mass. Dominant production mechanisms for γ rays of energies ∼30 MeV–30 GeV are the decay of pions produced in collisions of CR protons with ambient matter and Bremsstrahlung scattering of CR electrons.

scholarly journals British plans for astronomy in Antarctica

1992 ◽  
Vol 9 ◽  
pp. 599-599
Author(s):  
R D Davies ◽  
J M Hough
Keyword(s):  
Gamma Rays ◽  
Small Area ◽  
Gamma Ray ◽  
Angular Resolution ◽  
State Of The Art ◽  
Austral Summer ◽  
Cosmic Ray ◽  
South Pole ◽  
Gamma Ray Astronomy ◽  
Air Shower

The South Pole air shower experiment (SPASE), a joint Bartol Research Institute and Leeds University project, has been operational since the austral summer of 1987/88. It is a cosmic ray telescope searching for cosmic gamma rays at energies up to 1000 TeV. Although it has a relatively small area (6800 m2), it is situated at an altitude of 2800 m and has a 24 hour coverage, making it very competitive. The angular resolution of 0.°8 at 200 TeV is state-of-the-art in gamma ray astronomy. The astronomical programme includes searches for gamma ray sources, searches for anisotropy in the cosmic ray sky and measuring the energy spectrum over the range 1014-1016 eV.

Development of the Buckland Park Cosmic Ray Air Shower Array for Ultra High Energy Gamma Ray Astronomy

1986 ◽  
Vol 6 (3) ◽  
pp. 335-338 ◽  
Author(s):  
D. Ciampa ◽  
R. W. Clay ◽  
C. L. Corani ◽  
P. G. Edwards ◽  
J. R. Patterson
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Astronomy ◽  
Air Shower ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Shower Array ◽  
Air Shower Array

AbstractThe Buckland Park air shower array is being developed particularly for use as an ultra-high-energy gamma ray astronomy telescope. The properties of this instrument are described with an emphasis on improvements being made to its angular resolution. Some early data are presented to illustrate the way in which the data obtained will be used.

scholarly journals Study of primary cosmic ray composition from gamma ray families in air shower cores

1997 ◽  
Vol 52 (3) ◽  
pp. 191-193
Author(s):  
K. Honda ◽  
N. Kawasumi ◽  
I. Tsushima ◽  
K. Hashimoto ◽  
T. Nishida ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Cosmic Ray ◽  
Air Shower

scholarly journals MULTI-TeV GAMMA-RAY OBSERVATION FROM THE CRAB NEBULA USING THE TIBET-III AIR SHOWER ARRAY FINELY TUNED BY THE COSMIC RAY MOON'S SHADOW

2009 ◽  
Vol 692 (1) ◽  
pp. 61-72 ◽  
Author(s):  
M. Amenomori ◽  
X. J. Bi ◽  
D. Chen ◽  
S. W. Cui ◽  
Danzengluobu ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Crab Nebula ◽  
Cosmic Ray ◽  
Air Shower ◽  
The Crab Nebula ◽  
Shower Array ◽  
Air Shower Array

ARGO-YBJ EXPERIMENT RESULTS AND PROSPECTS IN LHAASO PROJECT

2012 ◽  
Vol 10 ◽  
pp. 147-158 ◽  
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.

HIGH ENERGY NEUTRINOS FROM ACCELERATORS OF COSMIC RAY NUCLEI

2008 ◽  
Vol 17 (09) ◽  
pp. 1401-1409
Author(s):  
ANDREW M. TAYLOR
Keyword(s):  
Active Galactic Nuclei ◽  
Gamma Ray ◽  
Neutrino Flux ◽  
Galactic Nuclei ◽  
Cosmic Ray ◽  
High Energy ◽  
Air Shower ◽  
Radiation Fields ◽  
High Energy Neutrinos ◽  
Neutrino Fluxes

Ongoing experimental efforts to detect cosmic sources of high energy neutrinos are guided by the expectation that astrophysical accelerators of cosmic ray protons also generate high energy neutrinos through their interactions with ambient matter and/or photons. However the predicted neutrino flux is reduced if cosmic ray sources accelerate not only protons but also a significant number of heavier nuclei, as is indicated by recent air shower data. I consider two plausible extragalactic class of sources, active galactic nuclei and gamma-ray bursts, and demand consistency with the observed cosmic ray composition and energy spectrum at Earth after allowing for propagation through intergalactic radiation fields. This allows me to calculate the degree of photo-disintegration and pion production expected to occur in these sources, and hence the neutrino fluxes from them.

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