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The Physics Teacher, 1973
Many of the most interesting discoveries about the Universe, which have occurred in the last few decades, have resulted from observations of the sky in light not visible to our eye. To emphasize this point it is only necessary to recall the discovery of the microwave background radiation, still the most convincing evidence for the Big-Bang theory ...
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Many of the most interesting discoveries about the Universe, which have occurred in the last few decades, have resulted from observations of the sky in light not visible to our eye. To emphasize this point it is only necessary to recall the discovery of the microwave background radiation, still the most convincing evidence for the Big-Bang theory ...
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Electronics and Power, 1975
X ray astronomy has been given fresh impetus in recent weeks with the success of the Ariel 5 satellite. Although only a relatively new branch of science, the study of cosmic X rays has led to the acquisition of important information concerning previously unexplained cosmological ...
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X ray astronomy has been given fresh impetus in recent weeks with the success of the Ariel 5 satellite. Although only a relatively new branch of science, the study of cosmic X rays has led to the acquisition of important information concerning previously unexplained cosmological ...
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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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