Results 281 to 290 of about 208,249 (317)
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Canadian Journal of Physics, 1968
A brief review is presented of the predicted intensities of gamma radiation from celestial objects. This is followed by a discussion of the use of a balloon-borne spark chamber to measure these intensities and to study the background gamma-ray intensity at 2.8 atmospheric pressure over Texas.
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A brief review is presented of the predicted intensities of gamma radiation from celestial objects. This is followed by a discussion of the use of a balloon-borne spark chamber to measure these intensities and to study the background gamma-ray intensity at 2.8 atmospheric pressure over Texas.
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IEEE Transactions on Nuclear Science, 1975
Recent observations have marked the transition of gamma ray astronomy from a discovery phase to an exploratory one. This has been the result of the development of a number of very sophisticated sensitive telescopes and the opportunity to place them on space platforms.
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Recent observations have marked the transition of gamma ray astronomy from a discovery phase to an exploratory one. This has been the result of the development of a number of very sophisticated sensitive telescopes and the opportunity to place them on space platforms.
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European Journal of Physics, 1988
The study of celestial gamma -rays represents the opening of one of the last observational windows in high-energy astrophysics. Gamma rays provide a unique method for observing the energetic processes which exist within many of the most unusual celestial objects.
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The study of celestial gamma -rays represents the opening of one of the last observational windows in high-energy astrophysics. Gamma rays provide a unique method for observing the energetic processes which exist within many of the most unusual celestial objects.
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Il Nuovo Cimento, 1958
Photons in the visible range form the basis of astronomy. They move in straight lines, which preserves source information, but they arise only very indirectly from nuclear or high-energy processes. Cosmic-ray particles, on the other hand, arise directly from high-energy processes in astronomical objects of various classes, but carry no information ...
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Photons in the visible range form the basis of astronomy. They move in straight lines, which preserves source information, but they arise only very indirectly from nuclear or high-energy processes. Cosmic-ray particles, on the other hand, arise directly from high-energy processes in astronomical objects of various classes, but carry no information ...
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1969
Nowadays, the studies of celestial gamma rays are of great interest for several areas of galactic astronomy. On a large scale, an upper limit of about a factor 3 is placed on the possible increase in density of the interstellar gas in the ring at 5 Kpc from the galactic center with respect to the solar neighbourhood.
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Nowadays, the studies of celestial gamma rays are of great interest for several areas of galactic astronomy. On a large scale, an upper limit of about a factor 3 is placed on the possible increase in density of the interstellar gas in the ring at 5 Kpc from the galactic center with respect to the solar neighbourhood.
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Journal of Physics G: Nuclear and Particle Physics, 2008
Covering a broad energy range from ∼100 GeV to 100 TeV and above, celestial TeV gamma rays are accessed by telescopes based on the ground, unlike x-rays and lower energy gamma rays, which can only be detected using instruments in space. The natural advantage this gives such telescopes in terms of collection area is now being exploited by a generation ...
P. M. Chadwick +2 more
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Covering a broad energy range from ∼100 GeV to 100 TeV and above, celestial TeV gamma rays are accessed by telescopes based on the ground, unlike x-rays and lower energy gamma rays, which can only be detected using instruments in space. The natural advantage this gives such telescopes in terms of collection area is now being exploited by a generation ...
P. M. Chadwick +2 more
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2016
The domain of gamma-rays is very extended and several observational techniques are needed to cover the range from the MeV region to the TeV region. The low energy side (up to tens GeV) is the domain of space based observatories. The very low energy gamma rays, up to a few MeV, can be detected with scintillator systems.
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The domain of gamma-rays is very extended and several observational techniques are needed to cover the range from the MeV region to the TeV region. The low energy side (up to tens GeV) is the domain of space based observatories. The very low energy gamma rays, up to a few MeV, can be detected with scintillator systems.
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EAS Publications Series, 2005
Progress in the understanding of many astrophysical objects requires the use radio and high energy data. This is particularly true in high energy astrophysics when considering compact objects. The emission processes emitting radio and high energy photons are furthermore deeply related.
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Progress in the understanding of many astrophysical objects requires the use radio and high energy data. This is particularly true in high energy astrophysics when considering compact objects. The emission processes emitting radio and high energy photons are furthermore deeply related.
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