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  • Analytical Chemistry and Spectroscopy  (810)
  • Inorganic Chemistry  (720)
  • ASTROPHYSICS  (542)
  • Animals  (374)
  • Humans  (276)
  • ASTRONOMY  (270)
  • 1995-1999
  • 1980-1984
  • 1975-1979  (2,934)
  • 1965-1969
  • 1960-1964
  • 1935-1939
  • 1979  (2,934)
Collection
Keywords
Publisher
Years
  • 1995-1999
  • 1980-1984
  • 1975-1979  (2,934)
  • 1965-1969
  • 1960-1964
    • +
Year
  • 1
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    Astronomy satellite obtains first X-ray burst picture (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: ASTRONOMY
    Type: NASA-NEWS-RELEASE-79-65 , P79-10051
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Americans and Canadians to study February 26 eclipse (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: ASTRONOMY
    Type: NASA-NEWS-RELEASE-79-18 , P79-10018
    Format: application/pdf
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  • 3
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    X-ray observatory reveals extremely distant quasars (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: ASTRONOMY
    Type: NASA-NEWS-RELEASE-79-36 , P79-10036
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    International Ultraviolet Explorer (IUE) Post Launch Report 2 (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The International Ultraviolet Explorer (IUE), an Explorer class ultraviolet astronomy mission, is an international cooperative program between the United States, the United Kingdom (UK), and the European Space Agency (ESA) which provides for a single launch into geosynchronous orbit to conduct spectral distribution studies of celestial and solar system ultraviolet sources. The spacecraft and scientific instruments were designed and fabricated at the Goddard Space Flight Center. The spectrograph camera was provided by the UK; ESA provided the solar array as well as the European ground station. The IUE observatory system was designed to functionally resemble a ground-based optical observatory at which guest observers could execute observing programs in real time. Observatory performance substantially exceeded design and mission objectives. The secondary mission objectives were also met.
    Keywords: ASTRONOMY
    Type: NASA-TM-80471 , S-868-78-03 , REPT-2
    Format: application/pdf
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  • 5
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    A flaring X-ray pulsar in Dorado (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A study of unusual gamma-ray bursts detected on March 5 and March 6, 1979 in the KONUS experiment on the Venera 11 and Venera 12 spacecraft shows their source to be flaring X-ray pulsar in Dorado.
    Keywords: ASTRONOMY
    Type: NASA-TM-75658 , REPT-617
    Format: application/pdf
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  • 6
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    UBVR observation of V1357 Cyg = Cyg X-1. Search of the optical radiation of the accretion disk (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Data from 30 nights of V 1357 Cyg observations in July, August, and September of 1977 are presented. The contribution of the disk to the optic brightness of the system is computed with regard for the heating of its surface by ultraviolet radiation from V 1357 Cyg and X-ray radiation from Cyg X-1. The disk radiation explains the irregular variability in the system brightness. The possibility of the eclipse of the star by the disk and the disk by the star is discussed.
    Keywords: ASTRONOMY
    Type: NASA-TM-75677 , PR-408
    Format: application/pdf
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  • 7
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    General properties of HII regions in galaxies (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The structure, electron density, and dimensions of HII regions in galaxies are discussed. These parameters are correlated to the chemical composition gradient along the galactic radius, the dimensions of the three largest HII regions in the galaxy, and the amount of hydrogen in the galaxy, as well as the mass, dimensions, and total optical luminosity of the galaxy. The relationships of HII regions to star formation and galactic nucleus activity are discussed and the kinematic properties of the SB and Sab galaxies are related to the size of HII regions.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75700
    Format: application/pdf
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  • 8
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    Southern RS CVn systems - Candidate list (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A list of 43 candidate RS CVn binary systems in the far southern hemisphere of the sky (south of -40 deg declination) is presented. The candidate systems were selected from the first two volumes of the Michigan Spectral Catalog (1975, 1978), which provides MK classifications for southern HD stars and identifies any unusual characteristics noted for individual stellar spectra. The selection criteria used were: (1) the occurrence of Ca II H and K emission; (2) known or suspected binary nature; (3) regular light variations of zero to one magnitude; and (4) spectral type between F0 and K2 and luminosity less than bright giant (II).
    Keywords: ASTRONOMY
    Type: Astronomical Journal; 84; Sept
    Format: text
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  • 9
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    Hydrodynamics of primordial black hole formation (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The hydrodynamic picture of the formation of primordial black holes (PBH) at the early stages of expansion of the Universe is considered. It is assumed that close to singularity, expansion occurs in a quasi-isotropic way. Using an EVM, a spherically symmetrical nonlinear problem of the evolution of primary strong deviation from the Fridman solution was solved. What these deviations must be, so that the formation of PBH occurred was clarified. Attention was devoted to the role of pressure gradients. It is pointed out that at the moment of formation of PBH, only a small part of matter enters into it, primarily the component of perturbation. It is also pointed out that at this moment, the mass of PBH essentially is smaller than the mass considered within the cosmic horizon. The possibility of changing the mass of the PBH as a result of accretion is analyzed.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75918 , PR-347
    Format: application/pdf
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  • 10
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    Non-equilibrium processes in interstellar molecules (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The types of nonequilibrium emission and absorption by interstellar molecules are summarized. The observed brightness emission temperatures of compact OH and H2O sources are discussed using the concept of maser amplification. A single thermodynamic approach was used in which masers and anti-masers are considered as heat engines for the theoretical interpretation of the cosmic maser and anti-maser phenomena. The requirements for different models of pumping are formulated and a classification is suggested for the mechanisms of pumping, according to the source and discharge of energy.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-75685 , PR-462
    Format: application/pdf
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