Fig. 10.
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Same as in Fig. 8, but for slit 1. The spatial extent of the images along the slit is 20″. Filament F1 is highlighted. Ellipses are drawn around [O III] λ5007, marking an ejecta velocity of + 1900 km s−1 at 4″ west of the pulsar, assuming freely coasting ejecta, and an age of 1100 years (blue) and 1200 years (red) for 0540. See text for further details.
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