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  • Other Sources  (7)
  • 2020-2024
  • 2020-2023
  • 2000-2004
  • 1975-1979  (7)
  • 1978  (7)
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  • 2020-2024
  • 2020-2023
  • 2000-2004
  • 1975-1979  (7)
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  • 1
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    Evidence that cosmic gamma-ray bursts are galactic (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Balloon observations registering scatter angles in a liquid scintillator have revealed gamma-ray bursts having energies as low as 10 to the -7th ergs per square cm. The burst distribution is graphed according to energy and frequency. The hypothesis that the bursts are galactic in origin is in good agreement with their small recorded energies and their predicted distribution on the graph.
    Keywords: ASTROPHYSICS
    Type: Nature; 271; Feb. 16
    Format: text
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  • 2
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    Search for broad gamma ray lines with the UCR double Compton scatter telescope (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The operation of a double scatter telescope and the evaluation of data obtained during a 24 hour balloon flight are discussed. An increase in gamma rays was observed as the galactic anti-center crossed the aperature of the telescope. Searches for lines from p(n,gamma)d at 2.2 MeV, C-12* at 4.4 MeV and on -16* at 6.1 MeV and for other lines broadened or redshifted are being conducted to identify the processes responsible for the production of celestial gamma rays. Two upper limits for lines in the angalactic anti-center direction at 4.4 MeV and 6.1 MeV are 6 and 4 x 10 to the minus 4 power gamma/sq cm-s.
    Keywords: SPACE RADIATION
    Type: NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys.; p 217-222
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  • 3
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    Precise clock synchronization via very-long-baseline interferometry (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Keywords: PHYSICS (GENERAL)
    Type: Proc. of the 9th Ann. Precise Time and Time Interval (PTTI) Appl. and Planning Meeting; p 127-134
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    NASA TECHNICAL REPORTS
  • 4
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    Discrete events at Viking-2 Mars site, northern summer (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The Viking-2 Mars Lander landed at 48 deg N 226 deg W, northern summer. During the summer period the wind vector exhibited a repetitive clockwise turning with a period of one Sol (Mars day). Occasionally, however, the rotation ceased and wind became principally northeasterly. These events were always multiples of a Sol in duration, and all began around local midnight. The exact reason for this behavior is not clear, but it is suggested that small variations in the strength of the global circulation may be responsible.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geophysical Research Letters; 5; Nov. 197
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  • 5
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    Mars meteorology - Three seasons at the surface (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: We summarize some meteorological results from Viking for northern summer, autumn and winter. Little Sol-to-Sol meteorological change was observed during summer, except for secular pressure change. However, a regular sequence of weather disturbances, interpreted as baroclinic waves, appeared primarily at VL-2 during autumn and winter. The number of Rossby waves present at a given instant is calculated to be 4 and 6 for these seasons. The extreme regularity and low wave number make these systems closely resemble the baroclinic waves of rotating annulus experiments.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Geophysical Research Letters; 5; Aug. 197
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  • 6
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    Cosmic diffuse gamma-rays at medium energies (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Cosmic diffuse gamma-ray fluxes have been measured in six energy intervals from 2 to 25 MeV with a balloon-borne gamma-ray telescope. It is found that the observed fluxes are compatible with an energy distribution of 0.0265 times E to the -2.08 (photon/sq cm-s-sr-MeV) at lower energies and steepen at higher energies to meet a power law of 0.017 (E/MeV) to the -2.4. No deviation of the gamma-ray flux from isotropy is observed for five different times during the balloon flight for 10-deg intervals up to 50 deg from the zenith and at celestial coordinates varying from latitude -27 deg, longitude 102 deg to latitude 56 deg, longitude 195 deg, excluding the region in the galactic-anticenter direction. Upper limits to fluxes of 3-25-MeV gamma rays are deduced for a number of possible galactic and extragalactic sources.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
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  • 7
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    Gamma-rays of 3 to 25 MeV from the galactic anti-center and pulsar NP 0532 (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Gamma-rays of 3 to 25 MeV are reported from the galactic anticenter region and the Crab Pulsar, NP 0532. The observations were carried out from Palestine, Texas, on May 13, 1975. Gamma-rays from the galactic anticenter were observed as the Crab Nebula passed overhead within 10 deg of the zenith. Pulsed gamma-rays from NP 0532 were observed at a 4.4-sigma significance level. The total flux from 3-25 MeV is 0.0049 + or - 0.002 photon/sq cm-sec. The pulsed flux from NP 0532 from 3 to 25 MeV is 0.00043 + or - 0.00026 photon/sq cm-sec. The ratio of the total to the pulsed flux from 3 to 25 MeV is 11 + or - 8.
    Keywords: SPACE RADIATION
    Type: International Cosmic Ray Conference; Aug 13, 1977 - Aug 26, 1977; Plovdiv; Bulgaria
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