A comparison of the various colors relevant to the DR1 point-source Hα flux calibration, within and beyond the Galactic plane (Pan-STARRS1 r – MDW Hα in blue; Pan-STARRS1 r – IGAPS Hα in orange; IGAPS r – IGAPS Hα in green). For ∣b∣ ≤ 5° (left), we calibrate to IGAPS Hα, which gives us good agreement when comparing to broadband measurements from IGAPS (shaded red) and Pan-STARRS1. Outside the plane (right), we calibrate to Pan-STARRS1 r, giving us close agreement.