SourceID 389636619892245248: Scan-angle signatures from a partially resolved double star with similar magnitudes and a separation of about 130 mas between the two components (determined by IDU for DR4). The top panel shows the unpublished IPD epoch GoF values determined by IDU in DR3, where we indicate the scans for which the IPD detected multiple peaks. The central panel shows the brightness in the G band and in the BP and RP photometry as provided by the epoch-photometry table published in DR3, to illustrate the differences in that instrument. It also includes the fits to G using Eq. (4) (pair model) and Eq. (5) (sinusoidal model). The bottom panel shows the image reconstructed by SEAPipe, with dashed grey circles at increasing radii in steps of 250 mas from the image centre. See text for further details.