  A key feature of the Pierre Auger Observatory is its hybrid design, in which
ultra high energy cosmic rays are detected simultaneously by fluorescence
telescopes and a ground array. The two techniques see air showers in
complementary ways, providing important cross-checks and measurement
redundancy. Much of the hybrid capability stems from the accurate geometrical
reconstruction it achieves, with accuracy better than either the ground array
detectors or a single telescope could achieve independently. We have studied
the geometrical and longitudinal profile reconstructions of hybrid events. We
present the results for the hybrid performance of the Observatory, including
trigger efficiency, energy and angular resolution, and the efficiency of the
event selection.
