Comparison of image parameters between the gamma-ray excess in the data (blue) and MC simulations of gamma rays (orange). Only observations with zenith distance below 30° are used. The top four rows of panels show intensity, length, width, and individual telescope “gammaness” (from top to bottom) for LST-1 (left), MAGIC-I (middle), and MAGIC-II (right). The bottom row shows stereoscopic parameters: height of the shower maximum (left), averaged “gammaness” (middle) and squared reconstructed distance to the source (right).