Dragon arc as seen by HST (blue = F435W, green = F814W, red = F160W). The eight transients (seven in the arc) identified by Kelly et al. (2022) are marked with circles. Labels are the same as in the original reference. The white curve is the CC from our lens model (see Appendix) at the redshift of the arc. The two cyan curves mark the boundary region between macromodel magnification above and below 100. The arc covers ∼1150 kpc² in the lens plane. Out of this, 190 kpc² is within the cyan curves (near region) and 960 kpc² is outside the cyan lines (far region).