The X-ray star
Cen X-3 was discovered from the UHURU observation by Giacconi et al, (1971) where it has been distinguished as 4.84 Second X-ray pulsar with a 2.087 day eclipse period.
The central X-ray star
was christened 1E 2259+586 for its listing in the First Einstein (1E) Catalog of X-ray Sources and its sky coordinates.
The paper also discusses the purpose of material energy radiation (radioactive decay) as energy supplement for smaller stars, like Earth, and the evolution of the stellar life forms from small planet-stars, into luminous stars, x-ray stars
, and eventually into black-hole stars.
"The last decade has seen enormous advances in X-ray astronomy, as the science has progressed from pioneering sounding rockets to the detailed observations now possible from many satellites.