Geometry of the precessing disk-jet system. The blue disk is tilted by ψ relative to the black hole spin axis (vertical), and the cyan cones show the jet with half-opening angle α. As the system precesses, the disk normal (blue arrow) periodically aligns with the observer’s line of sight (orange arrow), and the jet beam crosses the LOS, producing the observed 2-min flares every 44 min. An accompanying animation is available here.