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    Stability in energy reconstructions of the highest-energy cosmic rays measured by the surface detector of the Pierre Auger Observatory

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    Stability in energy reconstructions ...
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    Author
    Schmidt, David R.
    Advisor
    Sarazin, Frederic
    Date issued
    2014
    Date submitted
    2014
    Keywords
    astroparticle physics
    surface detector
    stability
    Pierre Auger Observatory
    energy reconstruction
    Cosmic rays -- Measurement
    Astrophysics
    Detectors
    Zenith distance
    Anisotropy
    
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    URI
    http://hdl.handle.net/11124/475
    Abstract
    Using the data of the Pierre Auger Observatory, this thesis illustrates the instability in surface detector energy reconstructions at low zenith angles via the use of two different, yet valid, lateral distribution functions. These instabilities are shown to result largely from a lack of information constraining the lateral distribution function fit at 1000 m from the shower axis, which is important for the determination of the energy estimator S1000. This lack of constraint is found to be a geometric effect attributed to the interplay between surface detector configuration and detector response. The influence of low zenith angle instabilities in energy reconstruction on energy dependent studies is also demonstrated in the context of a point-source anisotropy scan.
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