Image in false colors of the I20210 system, obtained by combining the grizy exposures of the Pan-STARRS1 survey (PS1; Chambers 2016) centered on the sky coordinates of I20210S (α_J2000 = 20 23 25.4, δ_J2000 = +11 31 34.7). The isophotes of the XMM-Newton Optical Monitor (OM) UVW1 mosaic exposure (green solid lines) taken simultaneously to the X-ray data analyzed by Piconcelli et al. (2010) – along with some of the associated CCD count levels – are drawn onto the PS1 image to highlight weak features. The TNG slit direction and position (magenta dot-dashed lines) are also indicated along with the positions and directions of the trace centers (white dashed lines) identified to extract the 1D spectrum of each object.