Sensitivity in the units of Crab Nebula flux percentage of the joint LST-1+MAGIC analysis with MCP from the Crab observations (blue circles) and MC simulations (orange squares) compared to MAGIC-only analysis using MARS (green triangles) and LST-1 sensitivity (red crosses. Abe et al. 2023). Left panels: zenith distance range of <30°, while the right panels for 30–45°. Bottom panel: ratio of sensitivity values of the joint analysis sensitivity to MAGIC-only (green triangles) and LST-1-only (red crosses), as well as with respect to the MC sensitivity performance (orange squares); e.g., the green points shows that the three-telescope system, relative to MAGIC alone, can in average detect sources with a flux ~30% lower. For visibility in the bottom panels, the points are shifted by ±2% on the X scale.