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  • Weitere Quellen  (63)
  • 2020-2022  (15)
  • 1975-1979  (46)
  • 1955-1959  (2)
  • 1
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    On observing the atmosphere from satellites. i - cloud observations (1959)
    In:  CASI
    Details
    Publikationsdatum: 2006-10-26
    Schlagwort(e): unknown
    Format: text
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  • 2
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    Soft X-rays from Her X-1 during the off phase (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-04-18
    Beschreibung: Weak 0.28-keV radiation was observed from Her X-1 5 days before turn-on in the 35 day cycle. The observations were made from an Aerobee rocket. The 0.28-keV intensity is about 1/25 that observed during the on phase. Some evidence for X-rays above 1 keV is also present, and it is possible that the spectrum is different only in intensity from the spectrum in the on phase. The radiation may be X-rays from the vicinity of the neutron star, scattered by ionized material in the inner accretion disk, or may be thermal radiation from the inner accretion disk, or both.
    Schlagwort(e): ASTROPHYSICS
    Materialart: NASA. Goddard Space Flight Center X-ray Binaries; p 127-139
    Format: text
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  • 3
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    Absence of iron line emission in Cyg X-3 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-04-18
    Beschreibung: An observation of Cygnus X-3 was made with soft X-ray detectors launched on an Aerobee rocket. The iron line emission observed one month later and in May 1975 was not found. A 3 sigma upper limit for this feature is 0.006 ph/2 cm/s.
    Schlagwort(e): ASTRONOMY
    Materialart: NASA. Goddard Space Flight Center X-ray Binaries; p 285-292
    Format: text
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  • 4
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    Soft X-ray observation experiment MA-048 (1976)
    In:  CASI
    Details
    Publikationsdatum: 2006-01-12
    Beschreibung: The Apollo Soyuz Test Project Soft X-ray Experiment was designed to observe celestial X-ray sources in the energy range from 0.1 to 10 kiloelectronvolts. The instrument that was used in the experiment obtained energy and fast timing data to characterize both the spectrum and the variability of known X-ray sources. Data were obtained on approximately 12 sources. During the mission, the instrument developed an intermittent high voltage discharge problem that resulted in the loss of approximately 75 percent of the anticipated data, including the scans intended for mapping of the low energy diffuse X-ray background.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project; 11 p
    Format: text
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  • 5
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    Soft X-ray emission from Hercules X-1 (1975)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Schlagwort(e): ASTRONOMY
    Materialart: Astrophysical Journal; 199; July 15
    Format: text
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  • 6
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    Soft X-ray emission from a newly discovered supernova remnant in Cygnus (1978)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-17
    Schlagwort(e): ASTROPHYSICS
    Materialart: Astrophysical Journal; vol. 222
    Format: text
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  • 7
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    On propagation direction of ring current proton ULF waves observed by ATS 6 at 6.6 R sub E (1977)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-17
    Beschreibung: From June 11 to September 16, 1974, the NOAA low-energy proton detector on board the ATS 6 satellite observed 71 cases of ultralow-frequency oscillations of proton flux intensities. The oscillation periods varied from 40 s to 6 min, and the events were observed most frequently during moderate geomagnetic conditions. The flux oscillations occurred at various local times, yet almost two thirds of the events were detected in the near-dusk region of the magnetosphere. For a majority of the events in this set a substantial phase shift in flux oscillation was detected between different energy channels and/or between two oppositely oriented detector telescopes. The phase shift is mainly due to the finite gyroradius effect of the protons gyrating in the geomagnetic field. By examining this finite gyroradius effect on the perturbed particle distribution function associated with the wave in a nonuniform magnetic field, the propagation direction of the wave from particle observations made by a single spacecraft is determined
    Schlagwort(e): SPACE RADIATION
    Materialart: Journal of Geophysical Research; 82; May 1
    Format: text
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  • 8
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    X-ray evidence for the supernova origin of the North Polar spur (1976)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Soft X-ray observations during four scans across the North Polar radio continuum spur have provided additional evidence that the spur encircles an old supernova remnant. From the measured intensity of the X-ray emission, and the known diameter of the remnant, it is estimated that its age is several hundred thousand years and that the supernova was of Type II, with an energy between 10 to the 51st and 10 to the 53rd ergs.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Astrophysical Journal; 207; Aug. 1
    Format: text
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  • 9
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    Protons as the prime contributors to storm time ring current (1975)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Following a large sudden commencement on June 17, 1972, a large magnetic storm evolved, with a well-developed main phase and recovery phase. Explorer 45 (S3-A), with its apogee near 16 hours local time in June, measured the equatorial particle populations and magnetic field throughout this period. By use of data obtained during the symmetric recovery phase it is shown that through a series of self-consistent calculations, the measured protons, with energies from 1 to 872 keV, can account for almost all of the observed ring current magnetic effects within the limits of experimental uncertainties. This enables us to set an upper limit to the heavy ion contribution to the storm time ring current of a few percent of the proton contribution.
    Schlagwort(e): GEOPHYSICS
    Materialart: Journal of Geophysical Research; 80; Sept. 1
    Format: text
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  • 10
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    Substorm-injected protons and electrons and the injection boundary model (1975)
    In:  Other Sources
    Details
    Publikationsdatum: 2011-08-16
    Beschreibung: Analysis of observations of substorm-associated enhancements of proton and electron fluxes: (1) makes a strong case for the existence of a boundary limiting the regional particle injection associated with substorms, (2) supports the hypothesis that the injection process is almost instantaneous (less than approximately 5 min), and (3) indicates that the injection takes place within a large region extending at least several earth radii tailward of the injection boundary. The injection boundary model is superior to others in that it simultaneously explains: (1) the drift and energy dispersion of substorm-injected protons between 1 and 30 keV, (2) the relative behavior of protons with 81 deg and 27 deg pitch angles, (3) the absence of observed electrons below 30 keV, and (4) the time dispersion of impulsively injected electrons seen outside the plasmapause.
    Schlagwort(e): GEOPHYSICS
    Materialart: Journal of Geophysical Research; 80; Feb. 1
    Format: text
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