Disentangled spectrum (blue) for the primary (Be star, left panels) and the companion (middle and right panel). The model in the left panels (black) is for a B star of 19 000 K with v sin i = 330 km s⁻¹. The models in the middle and right panels are for a stripped star of 45 000 K (black) and 65 000 K (grey) with v sin i = 30 km s⁻¹. Emission features in the top-left panel are mostly due to iron.