Results from SED fitting on the foreground lens and background source and their corresponding PDFs. Left: SED fitting results from LEPHARE for the lens (red) and the source (blue) using the photometry extracted from the lens modeling with SL_FIT (see Sects. 2.3 and 3). Right: redshift PDF for the lens and the source (same colors) when using LEPHARE (continuous lines), CIGALE (dashed lines), and EAZY (dotted lines). We note that the detections in the u, g, and r bands for the source are likely contaminated by a nearby UV-bright foreground galaxy located west of the ring (see Fig. A.4.)