Hamilton-Drager, Catrina M., Johns-Krull, Christopher M., Mundt, Reinhard, LeDuc, Katherine M., Herbst, William, Ibrahimov, Mansur, and Winn, Joshua N.

50 years that are attributed to the effect of a precessing circumbinary disk. Advancement of the occulting edge across the projection on the sky of the binary orbit has continued and the photospheres of both stars are now...

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