The nature of the companion star in Circinus X-1

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The nature of the companion star in Circinus X-1

© 2015 The Authors. We present optical spectra and images of the X-ray binary Circinus X-1. The optical light curve of Cir X-1 is strongly variable, changing in brightness by 1.2 mag in the space of four days. The shape of the light curve is consistent with that seen in the 1980s, when the X-ray and...

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Bibliographic Details
Main Authors:	Johnston, H., Soria, Roberto, Gibson, J.
Format:	Journal Article
Published:	Oxford University Press 2016
Online Access:	http://hdl.handle.net/20.500.11937/45808

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