Fig. 1.
Phase lags (upper panel) and coherence (lower panel) between the instantaneous luminosity of the BL, L, and its rotation frequency, Ω. A positive phase lag means that Ω lags L. The vertical green lines show the frequencies corresponding to the depletion tdepl (dot-dashed) and the friction 1/αΩK (dashed) time scales. Additional error bars (vertical dotted black lines) show the variability of the quantities within the bin. The parameters are α = 10−7, tdepl ≃ 740 s (corresponding to q ≃ 0.68), and a NS spin period of 3 ms.
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