FUSE spectrum of Sanduleak’s star around O VI λλ 1032 and 1038 in the Doppler factor space. The solid and dotted lines are for O VI λ 1032, and O VI λ 1038 (multiplied by 2), respectively. The thick lines show the profiles convolved with the instrumental profile (see the text). There exists a clear small excess at ∼20 km s⁻¹ in the O VI λ 1038 line. The emission at ∼−150 km s⁻¹ blueward of O VI λ 1038 is C II λ 1037.