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Fig. 12.
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[O I]λ6300/Hα map with the [O III]λ5007/Hβ contours overlaid in white showing a region of 25″ × 25″ around the ULX (white circle). Extended emission with high [O I]λ6300/Hα ratios is seen south to the peak of the [O III]λ5007/Hβ indicating X-ray excitation.
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