Observational data of the SY Cha system. Left: SPHERE/IRDIS polarized light H-band data of SY Cha. A variable Gaussian kernel was used to smooth the image. The FWHM of the kernel was set proportional to the inverse of the signal in the image (i.e., regions with strong signal were smoothed minimally), while regions that mostly contained background noise were smoothed strongly, analogously to what was done for the UX Tau system in Ménard et al. (2020). The data are shown on a logarithmic scale in order to highlight the disk morphology. The effective resolution element is shown on the lower right. The black dashed ellipse matches the ALMA inclination and position angle and highlights two features near the northern ansae. Middle: SPHERE/IRIDS K-band data of SY Cha. The image is shown on a logarithmic scale. The data have been smoothed with a simple Gaussian to boost the signal. Right: ALMA dust continuum emission of SY Cha in Band 7 from Orihara et al. (2023). The beam size is indicated by the white ellipse in the lower right corner.