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Spectroscopic and statistical properties of X-ray sources∗: (Invited discourse)

Published online by Cambridge University Press:  14 August 2015

Livio Gratton
Livio Gratton*
Affiliation:
University of Rome, Italy

Extract

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Among the little less than 50 known X-ray sources, only 7 had been identified with optical objects at the end of 1968 (Gratton, 1968) and a couple or so have been added during the present Symposium; some identifications are still uncertain.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 37: Non-Solar X- and Gamma-Ray Astronomy , 1970 , pp. 162 - 172
Copyright
Copyright © Reidel 1970 

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