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Proceedings of the Indian Academy of Sciences - Section A, 1971
Gamma-ray production by particles escaping from a pulsar into the surrounding nebula is considered. The gamma-ray emission decreases with time and such pulsar-nebula complexes will be observed as transient sources.
T. N. Rengarajan, Krishna M. V. Apparao
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Gamma-ray production by particles escaping from a pulsar into the surrounding nebula is considered. The gamma-ray emission decreases with time and such pulsar-nebula complexes will be observed as transient sources.
T. N. Rengarajan, Krishna M. V. Apparao
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Directional Detector of Gamma Ray Sources
Health Physics, 1996This work describes the design, development, and characterization of an ionization chamber to detect and locate gamma ray sources with intensities down to 100 mu Gy h(-1). The results show that sources of x ray and gamma radiation in the energy range of 14 to 1,250 keV can be located.
S Kronenberg +3 more
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Space Science Reviews, 1983
Various models are examined, which could give rise to point-like gamma-ray sources, at the present time indistinguishable, experimentally, from true point sources. These models involve energetic processes associated with interstellar clouds, e.g. supernova-cloud interactions, neutron star accretion inside interstellar clouds, cloud collisions, etc. The
G. Tenorio-Tagle, Gregor E. Morfill
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Various models are examined, which could give rise to point-like gamma-ray sources, at the present time indistinguishable, experimentally, from true point sources. These models involve energetic processes associated with interstellar clouds, e.g. supernova-cloud interactions, neutron star accretion inside interstellar clouds, cloud collisions, etc. The
G. Tenorio-Tagle, Gregor E. Morfill
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2004
From the contents:Preface.- 1. Introduction.- 2. Fundamentals of gamma-ray astrophysics.- 3. Galactic gamma-ray sources.- 4. Extragalactic gamma-ray sources.- 5. Non-thermal emission from early-type binaries.- 6. Gamma-ray emission from supernova remnants.- 7. Gamma-ray pulsars.- 8. Theories of gamma-ray emission from pulsars.- 9.
Kwong-Sang Cheng, Gustavo E. Romero
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From the contents:Preface.- 1. Introduction.- 2. Fundamentals of gamma-ray astrophysics.- 3. Galactic gamma-ray sources.- 4. Extragalactic gamma-ray sources.- 5. Non-thermal emission from early-type binaries.- 6. Gamma-ray emission from supernova remnants.- 7. Gamma-ray pulsars.- 8. Theories of gamma-ray emission from pulsars.- 9.
Kwong-Sang Cheng, Gustavo E. Romero
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Galactic Gamma-Ray Sources [PDF]
, 2004 The EGRET telescope has detected over 200 γ-ray sources above 100 MeV, but many remain unidentified because of their poor localization or their faintness at lower energies. Multi-wavelength searches have proved successful at finding interesting blazar and pulsar counterparts at high latitudes, but rarely in the Galactic plane because of confusion. Yet,
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Unidentified Gamma-Ray Sources [PDF]
, 2001 After γ-ray measurements opened a new window to observational astronomy, the question arose as to what kind of objects and which physical processes produce the observed emission. Because the early balloon experiments suffered from inadequate resolution and sky coverage, the first phenomenon associated with unidentified γ-ray-emitting sources was γ-ray ...
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Gamma-ray sources and equipment
1982In 1896 Becquerel discovered that certain of the heavier elements emitted penetrating radiation and were unstable; the earlier concept that elements represented the most stable form of matter had therefore to be abandoned. There are three radioactive series known in nature, the parent elements of which are uranium-238, uranium-235 and thorium-232. Each
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2001
The first measurements of high-energy particles following solar flares in space and on the ground were performed during the 1940s, and by the 1960s the experiments were accurate enough to deduce spectral parameters. It was recognized that γ-ray continuum and, most importantly, γ-ray lines should be observable at high altitudes if a sufficiently large ...
Erich Rieger, Gerhard Rank
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The first measurements of high-energy particles following solar flares in space and on the ground were performed during the 1940s, and by the 1960s the experiments were accurate enough to deduce spectral parameters. It was recognized that γ-ray continuum and, most importantly, γ-ray lines should be observable at high altitudes if a sufficiently large ...
Erich Rieger, Gerhard Rank
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2010
The quiet Sun, the Moon, the Earth and other Solar System objects are sources of high-energy gamma rays. The emission is produced by interactions of Galactic cosmic rays: by nucleons in the surface and atmosphere of the sources via hadronic interactions, and by electrons on solar photons in the heliosphere via inverse Compton scattering. Both emissions
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The quiet Sun, the Moon, the Earth and other Solar System objects are sources of high-energy gamma rays. The emission is produced by interactions of Galactic cosmic rays: by nucleons in the surface and atmosphere of the sources via hadronic interactions, and by electrons on solar photons in the heliosphere via inverse Compton scattering. Both emissions
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Population studies of the gamma-ray sources
AIP Conference Proceedings, 2001We present the status of ongoing modelling of the populations of the EGRET point sources. To analyze the two-dimenstional distribution, we wrote Monte Carlo simulations to produce model populations. We compared models containing an isotropic component and one or two galactic components to the EGRET catalog; preliminary results indicate that while one ...
Sandro Mereghetti +4 more
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