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  • ASTRONOMY  (2)
  • Atomic, Molecular, and Optical Physics
  • Condensed Matter: Electronic Properties, etc.
  • 1985-1989  (2)
  • 1
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    Optical observations of SN 1987D in UGC 7370 (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper presents optical photometry and spectroscopy of SN 1987D, a Type Ia supernova in the nearby galaxy UGC 7370, during the period immediately subsequent to its discovery. The distance modulus of the galaxy, independently determined by the redshift and the Tully-Fisher (1977) relation, is 32.3 + or - 1.0. The maximum brightness of SN 1987D was V about 13.2 and occurred on April 18, 1987, + or - 4 days; the absolute luminosity is about 0.6 mag brighter than the average for SNe Ia. The spectrum of SN 1987D is typical of SNe Ia, but the expansion velocity (9600 km/s) is considerably lower than average.
    Keywords: ASTRONOMY
    Type: Astronomical Society of the Pacific, Publications (ISSN 0004-6280); 99; 1167-117
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    X-ray observations of the bright quasar survey (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Using the Einstein Observatory, X-ray observations of about 80 percent of the quasars in the Bright Quasar Survey located outside the declination range defined by 30 and 60 deg. X-ray emission has been detected above the 3-sigma level for 57 out of 66 quasars observed. This paper describes observations and data reduction and provides a summary of the more detailed analyses and discussion contained in the two accompanying papers (Schmidt and Green 1986, Avni and Tananbaum 1986).
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 305; 57-67
    Format: text
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    NASA TECHNICAL REPORTS
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