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Fig. 3


Example, unfolded spectra of two ULXs from our sample and two well known NS-XRBs in the soft state. a) 4U 1705-44, during a soft state. b) Double thermal spectrum from NS-LMXB 4U 1916-05. c) Apparent, dual thermal emission from ULX M81 X-6, at similar temperatures (see Table 2) as 4U 1705-44. d) Similarly shaped spectrum from NGC 4559 X-1.

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