Inter-telescope calibration: reconstructed energies for γ-ray-like events from Crab Nebula observations, with a similar (difference less than 20%) distance from each telescope to the reconstructed shower core. The density of events in the parameter space is color-coded, with yellow values representing more events and blue values representing fewer events. A 1:1 relationship for the event energies is plotted in black, corresponding to perfect inter-telescope calibration. For compactness, we only show the results for 2019–2020.