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Fig. 1.


MUSE whitelight detail image of the region in NGC 6656 containing the nebula created from a single observation (left). Contours give the combined [N II]λλ6548, 6583 emission flux after subtracting the stellar background (see Sect. 3.1). White circles represent HST sources from the catalogue of Nardiello et al. (2018), the diameter scales with F606W magnitude. The median flux in the four layers containing the [N II]λ6583 emission line is shown after the median flux in three adjacent layers was subtracted (right). The two apertures used to extract the spectrum of the nebula are shown as white circles.

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