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The identification and UBV photometry of the visible component of the Centaurus X-3 binary system
Krzeminski, W.
Astrophysical Journal, vol. 192, Sept. 15, 1974, pt. 2, p. L135-L138. (ApJL Homepage)
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NASA/STI Keywords:
Eclipsing Binary Stars, Light Curve, Stellar Spectrophotometry, Ubv Spectra, Variable Stars, X Ray Sources, Astronomical Catalogs, Companion Stars, Pulsars
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The optical component of the pulsating binary X-ray source Cen X-3 is identified with a faint, /V/ = 13.35, heavily reddened variable star lying slightly outside the error box of the 3U catalog. It shows a double-peaked light curve with an amplitude of about 0.12 mag which agrees in both period and phase with the X-ray data. The shallower minimum coincides in time with the X-ray pulsar eclipse. The estimated distance to Cen X-3 is about 8 kpc.

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