Fig. 6.
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FIES spectrum and line-profiles. Top-left: complete FIES spectrum of PM 1-322. Top-right: [O III] 5007 line showing a flat-topped profile (the profile of [Ne III] 3869 is shown for comparison). Bottom-left: Balmer lines from lower levels develop a double-peaked profile. Bottom-right: [N II] lines from lower levels also exhibit a double-peaked profile. Line profiles were normalised to unity.
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