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Fig. 3
Family of thermal energy spectra as a function of the spin parameter, a, for i = 30°, fcol = 1.6 and the mass and accretion rate of Cygnus X-1, for a uniform magnetic field with λ = 0.1. The grey scale represents νLν in erg s-1 (see the legend). Note the sharp change in the spectra around the interface a ~ 1.
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