Techniques for measuring aerosol attenuation using the Central Laser Facility at the Pierre Auger Observatory

The Pierre Auger Collaboration

    Research output: Contribution to journalArticle

    Abstract

    The Pierre Auger Observatory in Malargüe, Argentina, is designed to study the properties of ultra-high energy cosmic rays with energies above 1018 eV. It is a hybrid facility that employs a Fluorescence Detector to perform nearly calorimetric measurements of Extensive Air Shower energies. To obtain reliable calorimetric information from the FD, the atmospheric conditions at the observatory need to be continuously monitored during data acquisition. In particular, light attenuation due to aerosols is an important atmospheric correction. The aerosol concentration is highly variable, so that the aerosol attenuation needs to be evaluated hourly. We use light from the Central Laser Facility, located near the center of the observatory site, having an optical signature comparable to that of the highest energy showers detected by the FD. This paper presents two procedures developed to retrieve the aerosol attenuation of fluorescence light from CLF laser shots. Cross checks between the two methods demonstrate that results from both analyses are compatible, and that the uncertainties are well understood. The measurements of the aerosol attenuation provided by the two procedures are currently used at the Pierre Auger Observatory to reconstruct air shower data.

    Original languageEnglish (US)
    Article numberP04009
    JournalJournal of Instrumentation
    Volume8
    Issue number4
    DOIs
    StatePublished - Apr 1 2013

    Fingerprint

    Observatories
    Aerosol
    Observatory
    Attenuation
    Aerosols
    aerosols
    observatories
    attenuation
    Laser
    Lasers
    lasers
    cosmic ray showers
    Fluorescence
    High Energy
    Extensive Air Showers
    Atmospheric Correction
    atmospheric correction
    fluorescence
    Argentina
    energy

    Keywords

    • Data analysis
    • Detector alignment and calibration methods (lasers, sources, particle-beams)
    • Large detector systems for particle and astroparticle physics

    ASJC Scopus subject areas

    • Instrumentation
    • Mathematical Physics

    Cite this

    Techniques for measuring aerosol attenuation using the Central Laser Facility at the Pierre Auger Observatory. / The Pierre Auger Collaboration.

    In: Journal of Instrumentation, Vol. 8, No. 4, P04009, 01.04.2013.

    Research output: Contribution to journalArticle

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    title = "Techniques for measuring aerosol attenuation using the Central Laser Facility at the Pierre Auger Observatory",
    abstract = "The Pierre Auger Observatory in Malarg{\"u}e, Argentina, is designed to study the properties of ultra-high energy cosmic rays with energies above 1018 eV. It is a hybrid facility that employs a Fluorescence Detector to perform nearly calorimetric measurements of Extensive Air Shower energies. To obtain reliable calorimetric information from the FD, the atmospheric conditions at the observatory need to be continuously monitored during data acquisition. In particular, light attenuation due to aerosols is an important atmospheric correction. The aerosol concentration is highly variable, so that the aerosol attenuation needs to be evaluated hourly. We use light from the Central Laser Facility, located near the center of the observatory site, having an optical signature comparable to that of the highest energy showers detected by the FD. This paper presents two procedures developed to retrieve the aerosol attenuation of fluorescence light from CLF laser shots. Cross checks between the two methods demonstrate that results from both analyses are compatible, and that the uncertainties are well understood. The measurements of the aerosol attenuation provided by the two procedures are currently used at the Pierre Auger Observatory to reconstruct air shower data.",
    keywords = "Data analysis, Detector alignment and calibration methods (lasers, sources, particle-beams), Large detector systems for particle and astroparticle physics",
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    AU - Ahn, E. J.

    AU - Albuquerque, I. F.M.

    AU - Allekotte, I.

    AU - Allen, J.

    AU - Allison, P.

    AU - Almela, A.

    AU - Alvarez Castillo, J.

    AU - Alvarez-Muñiz, J.

    AU - Batista, A. R.

    AU - Ambrosio, M.

    AU - Aminaei, A.

    AU - Anchordoqui, L.

    AU - Andringa, S.

    AU - Antičić, T.

    AU - Aramo, C.

    AU - Arqueros, F.

    AU - Asorey, H.

    AU - Assis, P.

    AU - Aublin, J.

    AU - Ave, M.

    AU - Avenier, M.

    AU - Avila, G.

    AU - Badescu, A. M.

    AU - Barber, K. B.

    AU - Barbosa, A. F.

    AU - Bardenet, R.

    AU - Baughman, B.

    AU - Bäuml, J.

    AU - Baus, C.

    AU - Beatty, J. J.

    AU - Becker, K. H.

    AU - Bellétoile, A.

    AU - Bellido, J. A.

    AU - Berat, C.

    AU - Bertou, X.

    AU - Biermann, P. L.

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    AU - Blanco, F.

    AU - Blanco, M.

    AU - Bleve, C.

    AU - Blümer, H.

    AU - Boháčová, M.

    AU - Boncioli, D.

    AU - Bonifazi, C.

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    AU - Borodai, N.

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    N2 - The Pierre Auger Observatory in Malargüe, Argentina, is designed to study the properties of ultra-high energy cosmic rays with energies above 1018 eV. It is a hybrid facility that employs a Fluorescence Detector to perform nearly calorimetric measurements of Extensive Air Shower energies. To obtain reliable calorimetric information from the FD, the atmospheric conditions at the observatory need to be continuously monitored during data acquisition. In particular, light attenuation due to aerosols is an important atmospheric correction. The aerosol concentration is highly variable, so that the aerosol attenuation needs to be evaluated hourly. We use light from the Central Laser Facility, located near the center of the observatory site, having an optical signature comparable to that of the highest energy showers detected by the FD. This paper presents two procedures developed to retrieve the aerosol attenuation of fluorescence light from CLF laser shots. Cross checks between the two methods demonstrate that results from both analyses are compatible, and that the uncertainties are well understood. The measurements of the aerosol attenuation provided by the two procedures are currently used at the Pierre Auger Observatory to reconstruct air shower data.

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    KW - Detector alignment and calibration methods (lasers, sources, particle-beams)

    KW - Large detector systems for particle and astroparticle physics

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