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Title: Data Quality and First Science Results of the Pierre Auger Experiment

Abstract

The Pierre Auger Project is building an ultra high energy cosmic ray observatory in the Province of Mendoza, Argentina. A description of the detectors will be given with an emphasis in their hybrid design and calibration and first data will be shown.

Authors:
 [1]
  1. Laboratorio Tandar, CNEA and CONICET, Buenos Aires (Argentina)
Publication Date:
OSTI Identifier:
21054888
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 884; Journal Issue: 1; Conference: 6. Latin American symposium on nuclear physics and applications, Iguazu (Argentina), 3-7 Oct 2005; Other Information: DOI: 10.1063/1.2710560; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CALIBRATION; COSMIC RADIATION; COSMIC RAY DETECTION; DESIGN; EEV RANGE; MENDOZA; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION

Citation Formats

Etchegoyen, A. Data Quality and First Science Results of the Pierre Auger Experiment. United States: N. p., 2007. Web. doi:10.1063/1.2710560.
Etchegoyen, A. Data Quality and First Science Results of the Pierre Auger Experiment. United States. doi:10.1063/1.2710560.
Etchegoyen, A. Mon . "Data Quality and First Science Results of the Pierre Auger Experiment". United States. doi:10.1063/1.2710560.
@article{osti_21054888,
title = {Data Quality and First Science Results of the Pierre Auger Experiment},
author = {Etchegoyen, A.},
abstractNote = {The Pierre Auger Project is building an ultra high energy cosmic ray observatory in the Province of Mendoza, Argentina. A description of the detectors will be given with an emphasis in their hybrid design and calibration and first data will be shown.},
doi = {10.1063/1.2710560},
journal = {AIP Conference Proceedings},
number = 1,
volume = 884,
place = {United States},
year = {Mon Feb 12 00:00:00 EST 2007},
month = {Mon Feb 12 00:00:00 EST 2007}
}
  • The Pierre Auger Observatory was designed for a high statistics, full sky study of cosmic rays at the highest energies. Energy, direction and composition measurements are intended to illuminate the mysteries of the most energetic particles in nature. The Auger Observatory utilizes a surface array together with air fluorescence telescopes which together provide a powerful instrument for air shower reconstruction. The southern part of the Auger Observatory, now under construction in the Province of Mendoza, Argentina, is well over half finished. Active detectors have been recording events for one and a half years. Preliminary results based on this first datamore » set are presented.« less
  • The southern site of the Pierre Auger Observatory is under the construction near Malargue in Argentina and now more than 60% of the detectors are completed. The observatory has been collecting data for over 1 year and the cumulative exposure is already similar to that of the largest forerunner experiments. The hybrid technique provides model-independent energy measurements from the Fluorescence Detector to calibrate the Surface Detector. Based on this technique, the first estimation of the energy spectrum above 3 EeV has been presented and is discussed in this paper.
  • The Pierre Auger Observatory, is designed to study cosmic rays at energies above 1019 eV. To achieve a uniform, full sky coverage, the Observatory is designed with two sites, one in the southern hemisphere, another one in the northern hemisphere. The southern observatory, currently under construction in Malarguee, Argentina, has started data taking with what amounts to about 1/4 of the full installation. We present the current status of the installation and first results from the dataset, collected from January 2004 to June 2005.
  • The Pierre Auger Observatory is the largest detector ever built for the study of ultra-high energy cosmic rays. The construction of its southern site in Mendoza Province in Argentina is almost complete and the observatory has been acquiring scientific data for more than two years. The cumulative exposure achieved during this period is greater than the exposure of any forerunner experiment. Furthermore, the Pierre Auger Observatory uses the innovative hybrid technique which combines the advantages of fluorescence telescopes (precise and nearly model-independent energy measurement) and the advantages of surface detector arrays (exact geometrical definition of exposure). A preliminary analysis ofmore » this initial data set will be presented, namely the spectrum and the results of anisotropy searches.« less
  • We present the results of searches for dipolar-type anisotropies in different energy ranges above 2.5 x 10{sup 17} eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% C.L. for EeV energies. We also compare our results to those of previous experiments as well as with some theoretical expectations.