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1. Atmospheric Monitoring for the Pierre Auger Fluorescence Detector

Author

Mostafa, M. A., Fick, B., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., PIERRE AUGER, Lantz, Simone, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, Physics::Atmospheric and Oceanic Physics
Abstract

Major uncertainties in the fluorescence energy measurement come from the precision of various atmospheric transmission, air Cerenkov subtraction, light multiple-scattering and cloud corrections. The Auger program for atmospheric monitoring, designed to measure these corrections and to minimize these uncertainties, is summarized in this paper., Four (4) pages, and three (3) EPS figures. Proceedings of the 28th International Cosmic Ray Conference, Universal Academy Press, Inc. Tokyo, Japan, HE (2003) 465-468

Published
2003

2. Shower Studies at around $10^{18}$ eV with the Surface Detector of the Pierre Auger Observatory

Author

P-L, Ghia, Mostafa, M. A., Fick, B., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., PIERRE AUGER, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Abstract

Three months of data taken by the Engineering Array Surface Detector of the Pierre Auger Observatory have been analyzed with the aim of setting a procedure for the study of showers at E_0 ~ 10^18 eV. We present the results, concerning: (i) the selection procedure and the check of its efficiency; (ii) the event rate and its stability; (iii) the characteristics of such events (i.e., angular direction, energy estimator S(1000), rise time vs core distance, correlation with pressure) showing their consistency with the expectations. The performances of the whole Surface Detector of the Auger Observatory are discussed., Comment: Talk given at 28th International Cosmic Ray Conferences (ICRC 2003), Tsukuba, Japan, 31 Jul - 7 Aug 2003

Published
2003

3. The Anisotropy Search Program For the Pierre Auger Observatory

Author

Clay, W., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., PIERRE AUGER, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Abstract

The Pierre Auger Southern Observatory in Argentina has begun taking data as it is being developed up to a final enclosed area of 3000 square kilometres. A key aspect of the project is to provide information on the origin of the highest energy cosmic rays through understanding the arrival directions of those particles. To avoid claims of a spurious anisotropy detection because trials have not been properly accounted, the Auger Collaboration has agreed 'a priori' to the analysis prescription presented here. It specifies the following: 1. The accumulation time for the (future) data set to be analyzed. 2. The anisotropy 'targets', each assigned a chance probability level. 3. The analysis procedure for each trial. A positive result will be claimed for any target search only if its chance probability is less than its assigned level. The levels are chosen so that the total chance probability for one or more positive results is 0.001. Exploratory searches beyond this prescription will be encouraged, but the Auger Collaboration will not assign any confidence level to anisotropies that may be discovered that way. Any such discovery would identify a good target for a prescription to be used with a subsequent Auger data set., 4 pages

Published
2003

4. Calibration of the Pierre Auger fluorescence detector

Author

Roberts, M., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., PIERRE AUGER, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics
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., Comment: 4 pages, no figures. Presented at the 28th International Cosmic Ray Conference

Published
2003
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5. Hybrid Performance of the Pierre Auger Observatory and Reconstruction of Hybrid Events

Author

Kick, B., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., J-M, Brunet, J-N, Capdevielle, Cohen, F., Courty, B., Guglielmi, L., J-J, Jaeger, Benoît Revenu, Tristram, G., Waisbard, J., Bertou, X., Billoir, P., Boratav, M., Castera, A., Dagoret-Campagne, S., Deligny, O., Lachaud, C., antoine letessier selvon, Genolini, B., Fabrice Lefebvre, Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R. P., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Anchordoqui, L., Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kajita T. Asaoka Y. Kawachi A. Matsubara Y. Sasaki M., PIERRE AUGER, Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), and Lantz, Simone

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Abstract

The Pierre Auger Observatory is a``hybrid'' UHECR detector. The surface detector (SD) and air fluorescence detector (FD) of the observatory are designed for observation of cosmic ray showers in coincidence, with a 10% duty cycle. The resulting data are expected to be superior in quality to those of either the SD or FD operating individually. Hybrid operation, triggering, data acquisition, and event reconstruction were successfully demonstrated during the prototype phase of the project. This paper focuses on 75 hybrid events recorded during a four month period of running with the prototype detectors in late 2001 and early 2002. The geometric technique for reconstruction of the hybrid events is described and its advantages over the traditional FD-only method are demonstrated. A lateral distribution for the water Cherenkov signals, derived from these data, is presented., Comment: Talk given at 28th International Cosmic Ray Conferences (ICRC 2003), Tsukuba, Japan, 31 Jul - 7 Aug 2003

Published
2003
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6. The Lateral Distribution Function of Shower Signals in the Surface Detector of the Pierre Auger Observatory

Author

Roth, M., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Lantz, Simone, Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), PIERRE AUGER, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Abstract

The surface detector (SD) array of the southern Pierre Auger Observatory will consist of a triangular grid of 1600 water Cherenkov tanks with 1.5 km spacing. For zenith angles less than 60deg the primary energy can be estimated from the signal S(1000) at a distance of about 1000m from the shower axis, solely on basis of SD data. A suitable lateral distribution function (LDF) S(r) is fitted to the signals recorded by the water tanks and used to quantify S(1000). Therefore, knowledge of the LDF is a fundamental requirement for determining the energy of the primary particle. The Engineering Array (EA), a prototype facility consisting of 32 tanks, has taken data continuously since late 2001. On the basis of selected experimental data and Monte Carlo simulations various preliminary LDFs are examined., To appear in the proceedings of the 28th ICRC (Tsukuba, Japan), 4 pages, 2 figures

7. Performance of the Pierre Auger Fluorescence Detector and Analysis of well recontructed events

Author

Argiro, S., Clay, W., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Roberts, M., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M, PIERRE AUGER, and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics
Abstract

The Pierre Auger Observatory is designed to elucidate the origin and nature of Ultra High Energy Cosmic Rays using a hybrid detection technique. A first run of data taking with a prototype version of both detectors (the so called Engineering Array) took place in 2001-2002, allowing the Collaboration to evaluate the performance of the two detector systems and to approach an analysis strategy. In this contribution, after a brief description of the system, we will report some results on the behavior of the Fluorescence Detector (FD) Prototype. Performance studies, such as measurements of noise, sensitivity and duty cycle, will be presented. We will illustrate a preliminary analysis of selected air showers. This analysis is performed using exclusively the information from the FD, and includes reconstruction of the shower geometry and of the longitudinal profile, Presented at the 28th International Cosmic Ray Conferences (ICRC 2003), Tsukuba, Japan, 31 Jul - 7 Aug 2003

8. Processing of the Signals from the Surface Detectors of the Pierre - Auger Observatory

Author

Roberts, M., Ave, M., Letessier, A., Bertou, X., Deligny, O., Lachaud, C., Altmann, E., Alvarez, P., Bauleo, P., Bonifazi, C., Etchegoyen, A., Eusebi, R., Fazzini, N., Ferrero, A., Filevich, A., Reguera, A., Cillis, A., Dova, M. T., Epele, L. N., Grunfeld, C., Mariazzi, A., Martinez, N., Roulet, E., Sciutto, S. J., Veiga, A., Allekotte, I., Avila, G., Masperi, L., Orsaria, M., Rovero, A., Clay, R. W., Dawson, B. R., Pace, R., Riordan, D., Thornton, G. J., Wild, N. R., Boutonnet, C., Brunet, J. M., Capdevielle, J. N., Cohen, F., Courty, B., Guglielmi, L., Jaeger, J. J., Benoît Revenu, Tristram, G., Waisbard, J., Billoir, P., Boratav, M., Castera, A., Sylvie DAGORET, Genolini, B., Lefebvre, F., Lhenry-Yvon, I., Trung, T. N., Parizot, E., Pouthas, J., Suomijarvi, T., Albert, J. N., Arnault, C., Bilhaut, R., Cordier, A., Cormier, E., Eschstruth, P., Jouniaux, O., Lavigne, B., Oleg Lodygensky, Rypko, J., Martin Urban, Bluemer, H., Bollmann, E., Csabo, T., Grindler, A., Gumbsheimer, R., Heck, D., Hucker, H., Kern, H., Klages, H. O., Kleinfeller, J., Mathes, H. J., Matussek, P., Michel-Piper, I., Risse, M., Schleif, G., Thouw, T., Balzer, M., Berg, R., Bormann, D., Gemmeke, H., Giraud, H., Kleifges, M., Kopmann, A., Kunka, N., Menchikov, A., Osswald, B., Remmel, U., Tscherniakhovski, D., Barenthien, N., Kampert, K. H., Keilhauer, B., Argiro, S., Camin, D. V., Guerard, C., Ambrosio, M., Bernardini, C., Facal, P., Filosofi, R., Fois, M., Matthiae, G., Privitera, P., Salina, G., Borreani, G., Cester, R., Menichetti, E., Pastrone, N., Aramo, C., Cangiano, E., Fonte, R., Insolia, A., Raia, G., Gora, D., Homola, P., Kutschera, M., Ostrowski, M., Wilczynska, B., Wilczynski, H., Arcon, I., Filipcic, A., Zavrtanik, D., Zavrtanik, M., Clark, P., Bruijn, L., Knapp, J., Lloyd-Evans, J., Patel, M., Tunnicliffe, V., Walker, P., Watson, A., Arisaka, K., Bonushkin, Y., Kubic, J., Slater, W., Tripathi, A., Brack, J., Hofman, G., Ristinen, R., Harton, J., Sites, J., Warner, D., Wilson, R., Cronin, J. W., Gibbs, K., Albrow, M., Andrews, R., Berman, E., Hoffer, D., Glass, H., Hojvat, C., Mantsch, P., Mazur, P., Spinka, H., Voyvodic, L., Matthews, J. M., Mcewen, M., Meyhandan, R., Darling, J., Dorofeev, A., Nemiroff, B., Nitz, D., Rafert, B., Ruotsala, S., Szadkowski, Z., Trombley, M., Dieterle, B., Matthews, J., Riley, S., Allison, P., Beatty, J., Coutu, S., Duvernois, M., Cassiday, G., Fick, B., Sommers, P., Luis. Anchordoqui, Machacek, M., Paul, T., Swain, J., Taylor, L., Akhperjanian, A., Chilingarian, A., Hovsepian, G., Mnatzakanian, E., Sahakian, V., Ter-Antonian, S., Aguirre, C., Bustos, R., Choque, K., Ticona, A., Ticona, R., Velarde, A., Thieu, D. Q., Darriulat, P., Chung, N., Dzung, N. T., Dinh, P. N., Phuong, P. T., Thuan, V. V., Physique Corpusculaire et Cosmologie - Collège de France (PCC), Collège de France (CdF (institution))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Kajita T. Asaoka Y. Kawachi A. Matsubara M. Sasaki M., PIERRE AUGER, Lantz, Simone, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics
Abstract

The detectors of the surface array of the Pierre Auger Observatory are water Cherenkov tanks. The signals from each tank are read out using three photomultipliers. The energy of the primary particle is inferred from signal densities and requires good linearity of the PMTs and a large dynamic range. The absolute time of arrival of the shower front at each tank is obtained from the Global Positioning System (GPS) with a resolution of about 10 ns, ensuring an accurate primary angular reconstruction. Additionally, it is intended to use the rise time and shape of the signals to constrain the nature of the primary particle: this sets further requirements on the signal processing. In this paper, the main features of the signal processing associated with the surface detector will be presented and its performance will be discussed in the context of the extraction of shower parameters., Comment: Submitted to 28th International Cosmic Ray Conferences (ICRC 2003), Tsukuba, Japan, 31 Jul - 7 Aug 2003

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