X-ray sources and their optical counterparts. III

Details X-ray sources and their optical counterparts. III X-ray sources and their optical counterparts. III

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975s%26t....49...10j&link_type=abstract

Sky and Telescope, vol. 49, Jan. 1975, p. 10-13.

Astronomy and Astrophysics

Astronomy

Extragalactic Radio Sources, Radiant Flux Density, X Ray Sources, Andromeda Galaxy, Astronomical Catalogs, Astronomical Maps, Galactic Clusters, Interstellar Gas, Light Emission, Magellanic Clouds, Quasars, Radio Galaxies, Seyfert Galaxies, Spiral Galaxies

Scientific paper

It is pointed out that approximately 40% of the 161 X-ray sources listed in the Third Uhuru Catalogue are considered to be extragalactic. They include at least one quasar, several clusters of galaxies, radio galaxies, a normal spiral galaxy, the Magellanic Clouds, and a large number of still unidentified sources. Various extragalactic X-ray sources are discussed and attention is given to the design of a sophisticated observatory for X-ray astronomy scheduled for launching as a satellite in 1978.

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