RGB image (R: 7500–8500 Å; G: 5600–6600 Å; B: 4850–5850 Å) of the whole MUSE field of view after a NGC 4361 nebular continuum subtraction (left). The continuum emission of the background galaxy is clearly seen to the west. Hα image of the z = 0.021 background galaxy to NGC 4361 (middle). The contours of NGC 4361 Hβ emission are as in Fig. 2. Broadband ‘blue’ (4850–5850 Å) image of the galaxy after NGC 4361 nebular continuum subtraction and foreground extinction correction, again with NGC 4361 Hβ contours (right).