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Pierre Auger Observatory Some science topics Spectrum Inclined Events Flu

Pierre Auger Observatory Some science topics Spectrum Inclined Events Fluorescence Yield Neutrino Limits Clusters/Anisotropy (Diego Harari) Photon Limit (Markus Risse). James W. Cronin Rencontres du Vietnam

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Pierre Auger Observatory Some science topics Spectrum Inclined Events Flu

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  1. Pierre Auger Observatory Some science topics Spectrum Inclined Events Fluorescence Yield Neutrino Limits Clusters/Anisotropy (Diego Harari) Photon Limit (Markus Risse) James W. Cronin Rencontres du Vietnam Hanoi August 7, 2006 1

  2. S1000 is Energy parameter 8

  3. SD energy ~ 1019.8

  4. Key feature of the Auger Observatory Hybrid measurements: Calibration of energy and shower geometry by fluorescence telescope

  5. 14

  6. Measured , not simulated

  7. Measured Not simulated By Tokonatsu Yamamoto University of Chicago

  8. Normalized to 1.0 at sec theta = 1.27 or theta = 38 deg Attenuation curve by constant intensity technique Measured from data not simulated 16

  9. ICRC 2005 18

  10. 19

  11. Comparison with HiRes1, AGASA

  12. 32,000 Inclined showers ≥ 600 Very large events with more than 50 tanks triggered

  13. Energy reconstruction Log(E/EeV) = 0.73 ± 0.03 + (1.04 ± 0.06) log(N19) Hybrid data: FD versus SD reconstruction Inclined showers > 60 deg

  14. 9 Signal processing can extract em/muon ratio

  15. Old Shower: pure muons 11

  16. Work in progress Preliminary ! Theoretical uncertainty ± factor 3 Preliminary ! 23

  17. Elongation Rate 17.5 18.5 18.0 18.75 19.25 19.75 Nicholas Busca Nicholas Busca

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