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  • 1
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    The X-ray line and continuum emission from a solar active region (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The X-ray spectrum of the quiet sun in the energy range of 2.3-6.9 keV was observed from an Aerobee rocket using an uncollimated graphite crystal spectrometer. These results and spatial measurements made with an onboard modulation collimator are analyzed using solar models. Several methods of estimating coronal temperatures are used in the analysis and all yield results within the range of (4 plus or minus 1) million K.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 42; May 1975
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Silicon X-ray line emission from solar flares and active regions (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: New observations of solar flare and active region X-ray spectra obtained with the Columbia University instrument on OSO-8 are presented and discussed. The high sensitivity of the graphite crystal panel has allowed both line and continuum spectra to be served with moderate spectral resolution. Observations with higher spectral resolution have been made with a panel of pentaerythritol crystals. Twenty-nine lines between 1.5 and 7.0 A have been resolved and identified, including several dielectronic recombination satellite lines to Si XIV and Si XIII lines which have been observed for the first time. It has been found that thermal continuum models specified by single values of temperature and emission measure have fitted the data adequately, there being good agreement with the values of these parameters derived from line intensity ratios.
    Keywords: SOLAR PHYSICS
    Type: Solar Physics; 60; Nov. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Time development of a small solar X-ray burst (1976)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: The 5.1-7.2 A X-ray emission from the sun was studied via OSO-8 with a high-resolution PET crystal spectrometer during the week of 17 November 1975, when the sun was active. The combination of good temporal and spectral resolution permitted the analysis of the data with multithermal coronal models over the course of a small X-ray burst.
    Keywords: SOLAR PHYSICS
    Type: COSPAR, Plenary Meeting; Jun 08, 1976 - Jun 19, 1976; Philadelphia, PA
    Format: text
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    NASA TECHNICAL REPORTS
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