Time-averaged spectral distribution of the QPO and continuum flux for V834 Cen. The high-state level (up-pointing triangles) is from Middleditch et al. (1991) and low-state level (down-pointing triangles) from Puchnarewicz et al. (1990). The difference (high-low) state (black squares) is assumed to be the accretion flux. Also shown are the measured QPO flux (open red circles) and the cyclotron flux (filled red circles) reconstructed from the QPO amplitude, assuming a constant fraction of the cyclotron flux as expected from the models (see text). Note that there is a large difference in the u′ filter when compared to the accretion flux.