Fig. 2
Images of the four pointings of NGC 6888. Columns are emission lines: from left to right [OII]λλ3726, 3728 Å, [OIII]λ5007 Å, and [NII]λλ6548, 6584 Å+Hα. The four different rows show the four regions observed; from top to bottom: (1) X-ray zone, (2) edge, (3) mini-bubble, and (4) bullet. In all the maps, north is down and east to the left.
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