Fig. 3.
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XMM-Newton EPIC PN, MOS1, and MOS2 spectra of M33 X-7 (black, red, and green curves, respectively) obtained at phase ϕ ≈ 0.47. The error bars correspond to 3σ; the best-fit combined thermal plasma (apec) and diskpbb model is shown by solid lines. The model parameters are shown in Table 3. Lower panel: residuals between the data and the best-fit model.
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