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  • 1
    Electronic Resource
    Electronic Resource
    X-ray, optical and radio observations of A1710–34 (1979)
    [s.l.] : Nature Publishing Group
    Nature 279 (1979), S. 620-622 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Measurements were made of A1710-34 with the 2.3' and 4.5' FWHM RMC detectors on the SAS 3 X-ray observatory2'3. These detectors are sensitive in the range 2-llkeV. Two independent sets of position measurements were made between 1600 UT 16 July and 1200 UT 22 July 1978. Details of the observations ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/279620a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spectral variability in X-ray sources (1977)
    [s.l.] : Nature Publishing Group
    Nature 267 (1977), S. 332-333 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We have examined published spectral data for the above two objects and four other well-observed sources - namely, Cen X-3, Her X-l, Cyg X-3 and Cir X-l. The references to all data used in this paper (more than 50 observations) are too numerous to mention here and are tabulated elsewhere6. In order ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/267332a0
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  • 3
    Electronic Resource
    Electronic Resource
    Enhanced X-ray emission above 50 keV in sco X-1 (1983)
    Springer
    Astrophysics and space science 95 (1983), S. 137-144 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Balloon observations of the X-ray source Sco X-1 carried out in November 1978 have revealed a thermal spectrum withkT≅7 keV in the 20–60 keV energy band. In addition, there was evidence of a high energy component, possibly variable, above ∼50 keV. The spectral form of this component could not be determined but was hard with a 60 keV flux of ∼10−4 photons (keV cm2 s)−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00661165
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  • 4
    Electronic Resource
    Electronic Resource
    Analyses of sidereal and solar anisotropies in cosmic rays (1996)
    Springer
    Space science reviews 78 (1996), S. 401-442 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Sun's interplanetary magnetic field and the solar wind modulate the distribution of galactic cosmic-ray particles in the heliosphere. The particles diffuse inward, convert outward and have drifts in the motion of their gyro-centres. Irregularities in the IMF also scatter particles from their gyro-orbits. These processes are the components of solar modulation and produce streaming (and higher-order anisotropies) of particles in the heliosphere. The anisotropies can be investigated at the Earth by examining the count rates of cosmic-ray detectors. The anisotropic streams appear as diurnal variations in solar and sidereal time in the count rates. Higher-order anisotropies produce generally much smaller semi-diurnal and higher-order variations. Theoretical models of solar modulation predict effects that depend on the polarity of the Sun's magnetic dipole. The solar diurnal and north-south anisotropies can be used to test these predictions. This paper is a short review of analyses of 60 years of cosmic-ray data collected at the Earth for the solar and sidereal diurnal variations present. Past analyses have yielded interesting and controversial results regarding the rigidity spectra and components of these anisotropies. Some of the controversy remains today. Analyses of these anisotropies have also yielded quantitative information about parameters important to solar modulation, such as latitudinal and radial density gradients. The relatively new techniques used for these determinations are explained here. Calculations of these modulation parameters from Earth-based cosmic-ray detectors are reviewed and compared to spaceprobe measurements and theoretical predictions of their values. Recently, investigations of the sidereal and solar diurnal anisotropies have been combined to calculate mean-free-paths of cosmic rays in the heliosphere. The latest conclusions from these analyses are that the parallel mean-free-paths of cosmic rays may depend on the polarity of the Sun's magnetic field. The results of these investigations are included in this paper to indicate the present state of knowledge concerning this facet of cosmic-ray research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00171926
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    Paper (German National Licenses)
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