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Calibration of the Pierre Auger fluorescence detector

M. Roberts M. Ave A. Letessier X. Bertou O. Deligny C. Lachaud E. Altmann P. Alvarez P. Bauleo C. Bonifazi A. Etchegoyen R. Eusebi N. Fazzini A. Ferrero A. Filevich A. Reguera A. Cillis M.T. Dova L.N. Epele C. Grunfeld A. Mariazzi N. Martinez E. Roulet S.J. Sciutto A. Veiga I. Allekotte G. Avila L. Masperi M. Orsaria A. Rovero R.W. Clay B.R. Dawson R. Pace D. Riordan G.J. Thornton N.R. Wild C. Boutonnet 1 J.M. Brunet 1 J.N. Capdevielle 1 F. Cohen 1 B. Courty 1 L. Guglielmi 1 J.J. Jaeger 1 Benoît Revenu G. Tristram 1 J. Waisbard 1 P. Billoir M. Boratav A. Castera S. Dagoret-Campagne B. Genolini 2 F. Lefebvre 2 I. Lhenry-Yvon 2 T.N. Trung 2 E. Parizot 2 J. Pouthas 2 T. Suomijarvi 2 J.N. Albert C. Arnault R. Bilhaut A. Cordier E. Cormier P. Eschstruth O. Jouniaux B. Lavigne Oleg Lodygensky J. Rypko Martin Urban H. Bluemer E. Bollmann T. Csabo A. Grindler R. Gumbsheimer D. Heck H. Hucker H. Kern H.O. Klages J. Kleinfeller H.J. Mathes P. Matussek I. Michel-Piper M. Risse G. Schleif T. Thouw M. Balzer R. Berg D. Bormann H. Gemmeke H. Giraud M. Kleifges A. Kopmann N. Kunka A. Menchikov B. Osswald U. Remmel D. Tscherniakhovski N. Barenthien K.H. Kampert B. Keilhauer S. Argiro D.V. Camin C. Guerard M. Ambrosio C. Bernardini P. Facal R. Filosofi M. Fois G. Matthiae P. Privitera G. Salina G. Borreani R. Cester E. Menichetti N. Pastrone C. Aramo E. Cangiano R. Fonte A. Insolia G. Raia D. Gora P. Homola M. Kutschera M. Ostrowski B. Wilczynska H. Wilczynski I. Arcon A. Filipcic D. Zavrtanik M. Zavrtanik P. Clark L. de Bruijn J. Knapp J. Lloyd-Evans M. Patel V. Tunnicliffe P. Walker A. Watson K. Arisaka Y. Bonushkin J. Kubic W. Slater A. Tripathi J. Brack G. Hofman R. Ristinen J. Harton J. Sites D. Warner R. Wilson J.W. Cronin K. Gibbs M. Albrow R. Andrews E. Berman D. Hoffer H. Glass C. Hojvat P. Mantsch P. Mazur H. Spinka L. Voyvodic J.M. Matthews M. Mcewen R. Meyhandan J. Darling A. Dorofeev B. Nemiroff D. Nitz B. Rafert S. Ruotsala Z. Szadkowski M. Trombley B. Dieterle J. Matthews S. Riley P. Allison J. Beatty S. Coutu M. Duvernois G. Cassiday B. Fick P. Sommers Luis. Anchordoqui M. Machacek T. Paul J. Swain L. Taylor A. Akhperjanian A. Chilingarian G. Hovsepian E. Mnatzakanian V. Sahakian S. Ter-Antonian C. Aguirre R. Bustos K. Choque A. Ticona R. Ticona A. Velarde D.Q. Thieu P. Darriulat N. Chung N.T. Dzung P.N. Dinh P.T. Phuong V.V. Thuan
Abstract : The absolute calibration of an air fluorescence detector (FD) is an important element in correctly determining the energy of detected cosmic rays. The absolute calibration relates the flux of photons of a given wavelength at the detector aperture to the electronic signal recorded by the FD data acquisition system. For the Auger FDs, the primary absolute calibration method uses a diffusive surface which is placed in front of a telescope aperture to uniformly illuminate the telescope field of view with a known light signal. This single-wavelength measurement (375 nm) will be made at intervals of several months until the stability of the telescopes is determined. The relative wavelength dependence of the calibration is determined through independent measurements. The error in absolute calibration at a single wavelength is estimated to be less than 10%. Two other absolute calibration methods are used to provide an independent verification of the primary measurement. The stability of the calibration with time is monitored nightly by a relative calibration system. In this paper we will provide descriptions of the absolute and relative calibration methods used by the Auger air fluorescence observatory. Results from the calibration of the Auger Engineering Array telescopes will also be presented.
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Submitted on : Wednesday, October 15, 2003 - 4:52:29 PM
Last modification on : Wednesday, November 25, 2020 - 6:42:08 PM

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M. Roberts, M. Ave, A. Letessier, X. Bertou, O. Deligny, et al.. Calibration of the Pierre Auger fluorescence detector. International Cosmic Ray Conference 28 ICRC 2003, Jul 2003, Tsukuba, Japan. pp.453-456. ⟨in2p3-00014056⟩

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