Spatial distribution of the fitted skewed Gaussian properties to the Lyα halo of A2744-45924. Shown are the velocity of the peak emission (top), the FWHM of the line in velocity space (middle), and the asymmetry parameter (see Eq. D.1; bottom). In these maps, we have masked out the pixels with a model amplitude (A in Eq. D.1) with S/N < 3. There are spatial variations of these parameters across the halo, in particular in a region with a slightly broader line profile and lower peak velocity toward the southwest. However, these differences are typical in Lyα halos of star-forming galaxies in the literature (e.g., Erb et al. 2018), and can be attributed to gas dynamics in the CGM.