Results 211 to 220 of about 10,143 (259)
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Journal of Optics, 1984
The observation of X-rays is a relatively new branch of Astronomy. As every new field of science this astronomy had an extremely fast and fruitful development. After twenty years of X ray exploration it is time to summarize the results and to envisage the future. This is the aim of this expose.
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The observation of X-rays is a relatively new branch of Astronomy. As every new field of science this astronomy had an extremely fast and fruitful development. After twenty years of X ray exploration it is time to summarize the results and to envisage the future. This is the aim of this expose.
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Contemporary Physics, 1989
Abstract Forty years ago an experiment mounted on a small sounding rocket measured the X-ray flux emitted by the hot outer layers of our Sun. This event marked the birth of X-ray astronomy, and in the intervening years many bizarre and fascinating objects have been discovered.
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Abstract Forty years ago an experiment mounted on a small sounding rocket measured the X-ray flux emitted by the hot outer layers of our Sun. This event marked the birth of X-ray astronomy, and in the intervening years many bizarre and fascinating objects have been discovered.
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Annual Review of Astronomy and Astrophysics, 1992
It has been 43 years since an experiment on board a 1 949 sounding rocket showed unambiguously with photon (Geiger) counters that the sun emits X rays (Friedman et al 1 95 1) and just 30 years since the first detection from another sounding rocket of a celestial X-ray source (Giacconi et al 1 962).
Hale V. D. Bradt +2 more
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It has been 43 years since an experiment on board a 1 949 sounding rocket showed unambiguously with photon (Geiger) counters that the sun emits X rays (Friedman et al 1 95 1) and just 30 years since the first detection from another sounding rocket of a celestial X-ray source (Giacconi et al 1 962).
Hale V. D. Bradt +2 more
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Physics Bulletin, 1972
Undoubtedly the most dramatic event this year on the xray astronomy scene was, paradoxically, observed by radio astronomers – the radio outburst from the xray star Cygnus X-3. On the evening of 2 September, Canadian radio astronomers at the Algonquin observatory working at a frequency of 10.5 GHz observed from the direction of this source the greatest ...
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Undoubtedly the most dramatic event this year on the xray astronomy scene was, paradoxically, observed by radio astronomers – the radio outburst from the xray star Cygnus X-3. On the evening of 2 September, Canadian radio astronomers at the Algonquin observatory working at a frequency of 10.5 GHz observed from the direction of this source the greatest ...
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IEEE Transactions on Nuclear Science, 1964
Although searches so far have been restricted to a few small rockets and balloons, some 40 discrete x-ray sources have already been resolved against a diffuse, nearly isotropic background radiation. The strongest source is about 2000 times as bright as the weakest detectable with present rocket instruments.
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Although searches so far have been restricted to a few small rockets and balloons, some 40 discrete x-ray sources have already been resolved against a diffuse, nearly isotropic background radiation. The strongest source is about 2000 times as bright as the weakest detectable with present rocket instruments.
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Physics Today, 1966
The most significant progress in x-ray astronomy in the past few years has been brought about by the advent of satellite observatories and by the great number of new radio and optical identifications of cosmic x-ray sources. Since the discovery, with rocket-borne instruments, of extrasolar sources of x radiation ten years ago, it has been clear to most
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The most significant progress in x-ray astronomy in the past few years has been brought about by the advent of satellite observatories and by the great number of new radio and optical identifications of cosmic x-ray sources. Since the discovery, with rocket-borne instruments, of extrasolar sources of x radiation ten years ago, it has been clear to most
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AIAA Journal, 1967
Instrumental and observational aspects of balloon X-ray astronomy involving position, angular size, intensity and spectral measurements of X-ray ...
LAURENCE E. PETERSON +2 more
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Instrumental and observational aspects of balloon X-ray astronomy involving position, angular size, intensity and spectral measurements of X-ray ...
LAURENCE E. PETERSON +2 more
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Advances in Space Research, 1990
Abstract The properties of the X-ray emission from normal stars, i.e., single stars located on the main-sequence or giant branch, are reviewed. Theoretical attempts to explain the observed X-ray emission both from early as well as late type stars are presented and, in particular, coronal length scale determination from spatially unresolved data is ...
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Abstract The properties of the X-ray emission from normal stars, i.e., single stars located on the main-sequence or giant branch, are reviewed. Theoretical attempts to explain the observed X-ray emission both from early as well as late type stars are presented and, in particular, coronal length scale determination from spatially unresolved data is ...
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2002
9.1 Useful Conversions . . . . . . . . . . . . . . . . . . . . 183 9.2 Characteristic X-Ray Transitions . . . . . . . . . . . . 184 9.3 Emission Mechanisms and Spectra . . . . . . . . . . . 184 9.4 Transmission of X-Rays Through the Interstellar Medium . . . . . . . . . . . . . . . . . . . . 194 9.5 Cosmic X-Ray Sources . . . . . . . . . . . . . . . . .
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9.1 Useful Conversions . . . . . . . . . . . . . . . . . . . . 183 9.2 Characteristic X-Ray Transitions . . . . . . . . . . . . 184 9.3 Emission Mechanisms and Spectra . . . . . . . . . . . 184 9.4 Transmission of X-Rays Through the Interstellar Medium . . . . . . . . . . . . . . . . . . . . 194 9.5 Cosmic X-Ray Sources . . . . . . . . . . . . . . . . .
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AIP Conference Proceedings, 2012
We provide a concise review of X-ray observations of synchrotron and inverse Compton radiation from relativistic electrons in cosmic sources, in the context of synergies between X-ray and γ-ray astronomy. Particular emphasis is placed on the cases of supernova remnants, pulsar wind nebulae, and relativistic jets of quasars.
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We provide a concise review of X-ray observations of synchrotron and inverse Compton radiation from relativistic electrons in cosmic sources, in the context of synergies between X-ray and γ-ray astronomy. Particular emphasis is placed on the cases of supernova remnants, pulsar wind nebulae, and relativistic jets of quasars.
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