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  • 1
    Electronic Resource
    Electronic Resource
    New Frontiers in X-Ray Astronomical Spectroscopy (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 655 (1992), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1992.tb17076.x
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  • 2
    Electronic Resource
    Electronic Resource
    Polarization Reversal of Solar Microwave Bursts (1970)
    [s.l.] : Nature Publishing Group
    Nature 226 (1970), S. 68-69 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. EVENT 01 ! JANUARY 18, 1969 Frequency Polari; sation Max. flux density (MHz) R! R2 10-22 W m-2 Hz-1 9,400 B 0 190 3,750 o L 108 2,000 L L 178 1,000 L R 135 The various theories that may give rise to a reversal of polarization1 may be classified as those which ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/226068a0
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  • 3
    Electronic Resource
    Electronic Resource
    Anomalous Temporal Behaviour of NP 0532 (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 1003-1004 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] If the rate of change of the period P or the frequency v is characterized by dP/dt=Kp/px-2 or dv/dt=-KvVn (1) where n = 5 for the gravitational radiation model3, n = 3 for the magnetic dipole model3, and n=l for the relativistic solar wind model4, only the first and second derivatives of the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2241003a0
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  • 4
    Electronic Resource
    Electronic Resource
    Temporal X-ray astronomy with a pinhole camera (1976)
    Springer
    Astrophysics and space science 42 (1976), S. 123-141 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The first preliminary results from the Ariel-5 All-Sky X-Ray Monitor are presented, along with sufficient experiment details to define the experiment sensitivity. Periodic modulation of the X-ray emission is investigated from three sources with which specific periods have been associated, with the results that the 4.8 h variation from Cyg X-3 is confirmed, a long-term average 5.6 day variation from Cyg X-1 is discovered, and no detectable 0.787 day modulation of Sco X-1 is observed. Consistency of the long-term Sco X-1 emission with a ‘shot-noise’ model is discussed, wherein the source behavior is shown to be interpretable as ∼ 100 ‘flares’ per day, each with a duration of several hours. A sudden increase in the Cyg X-1 intensity by almost a factor of three on 22 April, 1975 is reported, after 5 months of relative source constancy. The light curve of a bright nova-like transient source in Triangulum is presented, and compared with previously observed transient sources. Preliminary evidence for the existence of X-ray ‘bursts’ with duration 〈1 h is offered, with the caveat that there is not yet any supporting evidence to guarantee that the effect is truly astronomical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645534
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  • 5
    Electronic Resource
    Electronic Resource
    Long term storage of relativistic particles in the solar corona (1971)
    Springer
    Solar physics 16 (1971), S. 208-223 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A model is presented which shows that large numbers of energetic electrons (0.3-〉 10 MeV) and protons (1–30 MeV) can be stored in the solar corona at altitudes around 3 × 105 km for periods in excess of 5 days. Specific reference is made to the time period July 6–16 1968 as an excellent example of energetic solar particle storage. Time histories of interplanetary charged particle intensities observed by the IMP-4 and Pioneer 8 satellites are used to substantiate this contention. Detailed reference is also made to solar X-ray, optical and radio data obtained during the period in question, in addition to interplanetary magnetometer data. This model provides a unique solution to many hitherto unexplained solar particle events, and can also account for the lack of prompt particle emission from certain large solar flares recorded in the past.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00154513
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  • 6
    Electronic Resource
    Electronic Resource
    Microwave and hard X-ray bursts from solar flares (1969)
    Springer
    Solar physics 8 (1969), S. 119-141 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have applied detailed theories of gyro-synchrotron emission and absorption in a magnetoactive plasma, X-ray production by the bremsstrahlung of non-thermal electrons on ambient hydrogen, and electron relaxation in a partially ionized and magnetized gas to the solar flare burst phenomenon. The hard X-ray and microwave bursts are shown to be consistent with a single source of non-thermal electrons, where both emissions arise from electrons with energies 〈 mc 2. Further-more, the experimental X-ray and microwave data allow us to deduce the properties of the electron distribution, and the values of the ambient magnetic field, the hydrogen density, and the size of the emitting region. The proposed model, although derived mostly from observations of the 7 July 1966 flare, is shown to be representative of this type of event.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00150663
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  • 7
    Electronic Resource
    Electronic Resource
    All-sky monitors for X-ray astronomy (1987)
    Springer
    Space science reviews 45 (1987), S. 269-289 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We discuss the rationale for a semi-permanent all-sky X-ray monitor, and investigate a variety of options for its implementation. We conclude that the Space Station offers an excellent opportunity for hosting such a monitor, and that a set of pinhole cameras can be configured to provide an effective and economical monitor system. A baseline of six independent pinhole modules, each of which requires approximately one cubic foot, 30 pounds, 2 watts, and 100 bits per second, can provide full sky coverage with scientifically interesting sensitivities. No other resources or special accommodation (such as detailed alignment registration, time-tagging or on-orbit servicing) would be required. The baseline system can locate bright sources to a few arc min, and can simultaneously measure each of the several hundred sources in the sky brighter than a few thousandths the intensity of the Crab nebula every day for decades.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00171996
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  • 8
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    Temporal X-ray astronomy with a pinhole camera (1976)
    Springer
    Details
    Publication Date: 1976-06-01
    Print ISSN: 0004-640X
    Electronic ISSN: 1572-946X
    Topics: Physics
    Published by Springer
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  • 9
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    Microwave and hard X-ray bursts from solar flares (1969)
    Springer
    Details
    Publication Date: 1969-07-01
    Print ISSN: 0038-0938
    Electronic ISSN: 1573-093X
    Topics: Physics
    Published by Springer
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  • 10
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    Long term storage of relativistic particles in the solar corona (1971)
    Springer
    Details
    Publication Date: 1971-01-01
    Print ISSN: 0038-0938
    Electronic ISSN: 1573-093X
    Topics: Physics
    Published by Springer
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