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  • Chemical Engineering  (824)
  • ASTRONOMY  (516)
  • 1975-1979  (1,340)
  • 1979  (700)
  • 1978  (640)
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  • 1975-1979  (1,340)
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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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
  • 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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    NASA TECHNICAL REPORTS
  • 7
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    The radio telescope RATAN 600 (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A six-meter radio antenna having 900 reflector elements arranged on a 579 -meter diameter circle and located in the northern part of the Caucasian Mountains is described. The elements are about 7.4 m by 2 m resulting in a total reflector surface of about 10,000 sq m. Individual elements can be adjusted by changing 260 screws and can be rotated both horizontally and vertically as well as being moved translationally in the radial direction. The circular area is equipped with a grid of tracks where four asymmetric cylindrical paraboloids serving as subreflectors are located. The directional profile or observational direction of the antenna is achieved by shifting the subreflectors and changing the position of the reflecting elements with respect to the subreflectors. Different radio sources can be observed at the same time by using different subreflectors and their associated reflector sectors. Each subreflector is connected to a receiving station. Capabilities for spectroscopic observation are discussed.
    Keywords: ASTRONOMY
    Type: NASA-TM-75396
    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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    NASA TECHNICAL REPORTS
  • 9
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    Future activity in astrophysics (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: An overview is given of the NASA astrophysics program with emphasis on missions which are likely to be started or flown within the next five to seven years. Included in this summary are descriptions of approved future missions such as the Infrared Astronomical Satellite, the Space Telescope and the HEAO-B and HEAO-C satellites, as well as of missions which are now in the planning stage. Such missions include the Cosmic Background and Extreme Ultraviolet Explorers, the Gamma Ray and Cosmic Ray Observatories, the Advanced X-ray Astrophysics Facility, infrared and optical/ultraviolet telescopes to be used on the Space Shuttle, and the orbiting gyroscope experiment (GP-B). The current state-of-the-art, as well as future requirements in astrophysical sensing techniques, are highlighted.
    Keywords: ASTRONOMY
    Type: EASCON ''78; Electronics and Aerospace Systems Convention; Sep 25, 1978 - Sep 27, 1978; Arlington, VA
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Tropospheric limitations on the accuracy of phase measurement of coordinates in astronomy (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The effect of tropospheric fluctuation on the accuracy of phase measurements of coordinates is discussed. The nature of the averaging of the tropospheric effects, if N coordinate measurements of duration T with period mu are made, is investigated. Various averaging modes depending on the relation of the various time parameters are investigated. Equations taking into account the correlations between individual observations are presented. It is shown that the correlation interval between the individual observations is always greater than the fluctuation period of tropospheric inhomogeneities typical for a given baseline.
    Keywords: ASTRONOMY
    Type: NASA-TM-75480
    Format: application/pdf
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