HST data of the two continuum-emitting sources G_E and G_W inside the Lyα-emitting nebula observed with MUSE. Left: HST WFC3/F160W observation with the subtracted quasar PSF. The two sources G_E and G_W are indicated by the purple circular apertures of $0\stackrel{″}{.}6$ radius (dotted line) and 1″ (solid line) centered on the galaxies. Next to G_W, the dashed purple line marks the original PSF of the quasar. Right: Lyα surface-brightness map obtained from the MUSE cube and smoothed with a Gaussian 2D kernel with ${\sigma }_x={\sigma }_y=0\stackrel{″}{.}3$. The dashed gray lines delimit the 1σ (6 × 10⁻¹⁹ erg s⁻¹ cm⁻² arcsec⁻²) and 5σ surface-brightness levels. The purple circles of radius $0\stackrel{″}{.}6$ and 1″ surrounding the continuum-detected sources are reproduced to better show the positions of the two galaxies relative to the Lyα clumps (C_W and C_E), and the position of the quasar is again marked by the dashed purple line.