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ABSTRACT THE X-ray source Cen X-3 (3U1118-60) is part of a pulsating, eclipsing, binary system1,2. The third Uhuru catalogue3 gives a best position for the source of α (1950) = 11 h 18 min

55 s, δ (1950) = −60° 19′ 5″ with a 90% confidence error box of area 7 × 10−4 deg2. At present this X-ray source has not been positively identified with an optical counterpart although

several candidates have been suggested— (refs 4–6 and L. Webster, unpublished). Access through your institution Buy or subscribe This is a preview of subscription content, access via your

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article * Purchase on SpringerLink * Instant access to full article PDF Buy now Prices may be subject to local taxes which are calculated during checkout ADDITIONAL ACCESS OPTIONS: * Log in

* Learn about institutional subscriptions * Read our FAQs * Contact customer support SIMILAR CONTENT BEING VIEWED BY OTHERS CYGNUS X-3 REVEALED AS A GALACTIC ULTRALUMINOUS X-RAY SOURCE BY

IXPE Article 21 June 2024 A 12.4-DAY PERIODICITY IN A CLOSE BINARY SYSTEM AFTER A SUPERNOVA Article 10 January 2024 EVIDENCE FOR A COMPACT OBJECT IN THE AFTERMATH OF THE EXTRAGALACTIC

TRANSIENT AT2018COW Article 13 December 2021 REFERENCES * Giacconi, R., Gursky, H., Kellogg, E., Schreier, E., and Tananbaum, H., _Astrophys. J. Lett._, 167, L67–L73 (1971). Article  ADS 

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174, L141–L142 (1972). Article  ADS  Google Scholar  * Liller, W., _IAU Circ._ 2518 (1973). * Krzeminski, W., _IAU Circ._ 2612 (1973). * Sanford, P. W., _Proc. R. Soc. (A)_ (in the press).

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references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Mullard Space Science Laboratory, University College, London, UK JOHN H. PARKINSON, KEITH O. MASON & PETER W. SANFORD Authors *

JOHN H. PARKINSON View author publications You can also search for this author inPubMed Google Scholar * KEITH O. MASON View author publications You can also search for this author inPubMed 

Google Scholar * PETER W. SANFORD View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE

THIS ARTICLE PARKINSON, J., MASON, K. & SANFORD, P. New position of Cen X-3 from Copernicus. _Nature_ 249, 746–747 (1974). https://doi.org/10.1038/249746a0 Download citation * Received:

27 March 1974 * Issue Date: 21 June 1974 * DOI: https://doi.org/10.1038/249746a0 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable

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