Hybrid Performance of the Pierre Auger Observatory

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 crosschecks and measurement redundancy. Much of the hybrid capability stems from the accurate geometrical reconstruction it achieves, with accuracy better than the ground array counters 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.

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Contribution to the 30th International Cosmic Ray Conference, Merida Mexico, July 2007

References(6)

Figures(3)

[1]

[Pierre Auger Collaboration], these proceedings (#299)

T. Suomijarvi

[2]

[Pierre Auger Collaboration] Nucl.Instrum.Meth. A. : 523 (2004) 50

J. Abraham

[3]

Capabilities of a giant hybrid air shower detector

P. Sommers
(
- Utah U.
)

- Astropart.Phys. 3 (1995) 349-360
•
DOI:
- 10.1016/0927-6505(95)00013-7

[4]

[Pierre Auger Collaboration], these proceedings (#313)

M. Roth

[5]

[Pierre Auger Collaboration], these proceedings (#594)

M. Unger

[6]

[Pierre Auger Collaboration], these proceedings (#596). Mean -0.025 RMS 0.08 E /E∆ -0.6 -0.4 -0.2 0 0.2 0.4 0.6 1000 1200 1400 1600 Mean -0.025 RMS 0.08 Mean -1.2 RMS 20 (g/cmmaxX∆ -100 -80 -60 -40 -20 0 20 40 60 80 100 1000 Mean -1.2 RMS 20

M. Healy