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Fig. 1

image

Top panels: basic para meters of LBQS 0302–0019 as reported by Shen (2016) together with an r-band image reconstructed from the MUSE data and the QSO spectrum with marked emission lines. The red rectangle on the broad-band image indicates the zoom-in region in the lower panels. Bottom panels: continuum-subtracted narrow-band (Δ λ = 30 Å in observed-frame) images of Lyα and He IIλ1640 centered on the QSO position (green cross). For visualization, a Gaussian smoothing with a dispersion of one pixel has been applied to suppress the noise. A coadded spectrum from an aperture of 2′′ diameter centered on the bright emission-line source Jil is shown on the right.

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