Koen, Chris2013-12-032013-12-032007Koen, C. (2007). HE0230–4323: an unusual pulsating hot subdwarf star. Monthly Notices of the Royal Astronomical Society, 377(3): 1275-12800035-8711http://hdl.handle.net/10566/896HE 0230−4323 is a known binary, consisting of a subdwarf star and a companion which is not observable in the optical. Photometric measurements reported in this paper have shown it to be both a reflection-effect and a pulsating variable. The dominant pulsation frequencies changed over the course of several nights of observing, from ∼32–39 d−1 to ∼8–16 d−1. Observations were obtained through B and V filters, and the variations in the two wavebands appear to be approximately 180◦ out of phase.enCopyright Oxford University Press. This file may be freely used for educational purposes, as long as it is not altered in any way. Acknowledgement of the authors and the source is required.Binaries: closeStars: individual: HE 0230−4323Stars: oscillationsStars: subdwarfsStars: variables: otherArticle