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Fig. 1

image

Reconstructed image of NGC 3132 in the [N II]λ6584 emission line, made by simulating the action of a narrow filter (see main text for details). The orange and violet rectangles mark the area used to extract the spectra of the newly detected northern and southern arcs (see Sects. 3 and 9). Here, and in forthcoming maps, this image willbe presented for reference with ten evenly spaced contours (in logarithmic scale), ranging from 1 × 10−18 erg cm−2 s−1 (white) to 1 × 10−14 erg cm−2 s−1 (black).

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