The Balloon-the-Shower programme of the Pierre Auger Observatory

Details The Balloon-the-Shower programme of the Pierre Auger Observatory The Balloon-the-Shower programme of the Pierre Auger Observatory

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010astra...6...27k&link_type=abstract

Astrophysics and Space Sciences Transactions, Volume 6, Issue 1, 2010, pp.27-30

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The southern part of the Pierre Auger Observatory in Argentina investigates cosmic rays with energies above about 5·1017 eV. High-energy events which have been recorded with both detector components, surface water Cherenkov tanks and fluorescence telescopes, are crucial for the energy calibration of the entire detector system. Using this method, the energy reconstruction of extensive air showers relies on a proper fluorescence light reconstruction which depends on the knowledge of atmospheric conditions like pressure, temperature and water vapour. These properties of the atmosphere vary with altitude and in time. Therefore, a dedicated monitoring programme has operated since March 2009 to measure an actual atmospheric profile with meteorological radio soundings shortly after the detection of a high-energy air shower with E0 > 2·1019 eV. We will present the technical implementation of this programme as well as a reconstruction analysis using the data obtained. The reconstructed primary energy of air showers and the position of the shower maximum are compared with those results using either monthly models for the local atmospheric conditions or global meteorological models.

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