Lyα velocity shift maps of the detected nebulae around z ∼ 3 faint quasars. The Lyα velocity shift map is computed from the first moment of the PSF- and continuum-subtracted data cubes within a ±FWHM_Lyα with respect to the wavelength of the peak of the Lyα emission of the nebula (Table A.2). The panels are shown using the same projected scale as Figure 5 (∼150 × 150 kpc) and a white crosshair indicates the location of the quasar. The ID of each system is shown at the top left corner of each panel.