Discovery of an X-ray QSO

This publication has 10 references indexed in Scilit:

• Positions of galactic X-ray sources: 20° < lII < 55°
  Nature, 1977
• Detection of X-ray emission from 3C 120
  The Astrophysical Journal, 1977
• Curtis Schmidt-thin prism survey for extragalactic emission-line objects - University of Michigan List I
  The Astrophysical Journal Supplement Series, 1977
• An optical catalog of quasi-stellar objects
  The Astrophysical Journal Supplement Series, 1977
• Emission-line galaxies and quasars in the Southern Hemisphere. I - Description and applications of an objective-prism survey
  The Astrophysical Journal, 1975
• Copernicus: X-ray Observations of 3C 390.3
  Monthly Notices of the Royal Astronomical Society, 1975
• The Cosmic X-Ray Background
  Published by Springer Nature ,1974
• The space dinsity of the Markarian galaxies including a region of thesouth galactic hemisphere.
  The Astrophysical Journal, 1973
• X-Ray Observations of the Virgo Cluster, NGC 5128, and 3c 273 from the UHURU Satellite
  The Astrophysical Journal, 1971
• Detection of X-Ray Emission from 3c 273 and NGC 5128
  The Astrophysical Journal, 1970