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We present the results of time‐resolved optical photometry and spectroscopy of the X‐ray transient XTE J1859+226 (V406 Vul). Photometric observations taken during 2000 and 2008 reveal the presence of the secondary star's ellipsoidal modulation. Further photometry obtained in 2010 shows the system ≃1 mag brighter than its quiescence level and the ellipsoidal modulation diluted by strong flaring activity...
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