Performance of the 433 m surface array of the Pierre Auger Observatory
Presented by
G. Silli* on behalf of
on behalf of the Pierre Auger Collaboration,
P. Abreu,
M. Aglietta,
J.M. Albury,
I. Allekotte,
A. Almela, J. Alvarez-Muñiz, R. Alves Batista, G.A. Anastasi, L.A. Anchordoqui, B. Andrada, S. Andringa, C. Aramo, P.R. Araújo Ferreira, J.C. Arteaga Velazquez, H.G. Asorey, P. Assis, G. Avila, A.M. Badescu, A. Bakalova, A. Balaceanu, F. Barbato, R.J. Barreira Luz, K.H. Becker, J.A. Bellido, C. Berat, M.E. Bertaina, X. Bertou, P.L. Biermann, V. Binet, K. Bismark, T. Bister, J. Biteau, J. Blazek, C. Bleve, M. Bohacova, D. Boncioli, C. Bonifazi, L. Bonneau Arbeletche, N. Borodai, A.M. Botti, J. Brack, T. Bretz, P.G. Brichetto Orchera, F.L. Briechle, P. Buchholz, A. Bueno, S. Buitink, M. Buscemi, M. Büsken, K.S. Caballero-Mora, L. Caccianiga, F. Canfora, I. Caracas, J.M. Carceller, R. Caruso, A. Castellina, F. Catalani, G. Cataldi, L. Cazon, M. Cerda, J.A. Chinellato, J. Chudoba, L. Chytka, R.W. Clay, A. Cobos Cerutti, R. Colalillo, A. Coleman, M.R. Coluccia, R. Conceição, A. Condorelli, G. Consolati, F. Contreras, F. Convenga, D. Correia dos Santos, C. Covault, S. Dasso, K. Daumiller, B.R. Dawson, J.A. Day, R.M. de Almeida, J. de Jesus, S.J. de Jong, G. De Mauro, J. de Mello Neto, I. De Mitri, J. de Oliveira, D. de Oliveira Franco, F. de Palma, V. de Souza, E. De Vito, M. del Río, O. Deligny, L. Deval, A. di Matteo, C. Dobrigkeit, J.C. D'Olivo, L.M. Domingues Mendes, R.C. dos Anjos, D. dos Santos, M.T. Dova, J. Ebr, R. Engel, I. Epicoco, M. Erdmann, C.O. Escobar, A. Etchegoyen, H. Falcke, J. Farmer, G.R. Farrar, A.C. Fauth, N. Fazzini, F. Feldbusch, F. Fenu, B. Fick, J.M. Figueira, A. Filipcic, T. Fitoussi, T. Fodran, M.M. Freire, T. Fujii, A. Fuster, C. Galea, C. Galelli, B. García, A.L. García Vegas, H. Gemmeke, F. Gesualdi, A. Gherghel-Lascu, P.L. Ghia, U. Giaccari, M. Giammarchi, J. Glombitza, F. Gobbi, F. Gollan, G. Golup, M. Gómez Berisso, P.F. Gómez Vitale, J.P. Gongora, J.M. Gonzalez, N.M. Gonzalez, I. Goos, D. Gora, A. Gorgi, M. Gottowik, T.D. Grubb, F. Guarino, G. Guedes, E. Guido, S.T. Hahn, P. Hamal, M.R. Hampel, P.M. Hansen, D. Harari, V.M. Harvey, A. Haungs, T. Hebbeker, D. Heck, G.C. Hill, C. Hojvat, J. Hörandel, P. Horvath, M. Hrabovsky, T. Huege, A. Insolia, P.G. Isar, P. Janecek, J.A. Johnsen, J. Jurysek, A. Kääpä, K.H. Kampert, N. Karastathis, B. Keilhauer, J. Kemp, A. Khakurdikar, V.V. Kizakke Covilakam, H. Klages, M. Kleifges, J. Kleinfeller, M. Köpke, N. Kunka, B.L. Lago, R.G. Lang, N. Langner, M.A. Leigui de Oliveira, V. Lenok, A. Letessier-Selvon, I. Lhenry-Yvon, D. Lo Presti, L. Lopes, R. López, L. Lu, Q. Luce, J.P. Lundquist, A. Machado Payeras, G. Mancarella, D. Mandat, B.C. Manning, J. Manshanden, P. Mantsch, S. Marafico, A. Mariazzi, I.C. Maris, G. Marsella, D. Martello, S. Martinelli, O. Martínez Bravo, M. Mastrodicasa, H.J. Mathes, J. Matthews, G. Matthiae, E.W. Mayotte, P. Mazur, G. Medina-Tanco, D. Melo, A. Menshikov, K.D. Merenda, S. Michal, M.I. Micheletti, L. Miramonti, S. Mollerach, F. Montanet, C. Morello, M. Mostafa, A.L. Müller, M.A. Muller, K. Mulrey, R. Mussa, M.S. Muzio, W.M. Namasaka, A. Nasr-Esfahani, L. Nellen, M. Niculescu-Oglinzanu, M. Niechciol, D. Nitz, D. Nosek, V. Novotný, L. Nozka, A. Nucita, L.A. Nunez, M. Palatka, J. Pallotta, P. Papenbreer, G. Parente, A. Parra, J. Pawlowsky, M. Pech, F. Pedreira, J. Pękala, R. Pelayo, J. Peña-Rodríguez, E.E. Pereira Martins, J. Perez Armand, C. Pérez Bertolli, M. Perlin, L. Perrone, S. Petrera, T. Pierog, M. Pimenta, V. Pirronello, M. Platino, B. Pont, M. Pothast, P. Privitera, M. Prouza, A. Puyleart, S. Querchfeld, J. Rautenberg, D. Ravignani, M. Reininghaus, J. Ridky, F. Riehn, M. Risse, V. Rizi, W. Rodrigues de Carvalho, J.R. Rodriguez Rojo, M.J. Roncoroni, S. Rossoni, M. Roth, E. Roulet, A. Rovero, P. Ruehl, A. Saftoiu, F. Salamida, H.I. Salazar, G. Salina, J. Sanabria Gomez, F.A. Sánchez, E.M. Santos, E. Santos, F. Sarazin, R. Sarmento, C. Sarmiento-Cano, R. Sato, P. Savina, C.M. Schäfer, V. Scherini, H. Schieler, M. Schimassek, M. Schimp, F. Schlüter, D. Schmidt, O. Scholten, P. Schovanek, F. Schröder, S. Schröder, J. Schulte, S.J. Sciutto, M. Scornavacche, A. Segreto, S. Sehgal, R.C. Shellard, G. Sigl, O. Sima, R. Smida, P. Sommers, J.F. Soriano, J. Souchard, R. Squartini, M. Stadelmaier, D. Stanca, S. Stanič, J. Stasielak, P. Stassi, A. Streich, M. Suárez-Durán, T. Sudholz, T. Suomijarvi, A.D. Supanitsky, Z. Szadkowski, A. Tapia, C. Taricco, C. Timmermans, O. Tkachenko, P. Tobiska, C.J. Todero Peixoto, B. Tomé, Z. Torrès, A. Travaini, P. Travnicek, C. Trimarelli, M.J. Tueros, R. Ulrich, M. Unger, L. Vaclavek, M. Vacula, J.F. Valdés Galicia, L. Valore, E. Varela, A. Vásquez-Ramírez, D. Veberic, C. Ventura, I.D. Vergara Quispe, V. Verzi, J. Vícha, J. Vink, S. Vorobiov, H. Wahlberg, C.K.O. Watanabe, A. Watson, M. Weber, A. Weindl, L. Wiencke, H. Wilczyński, M. Wirtz, D. Wittkowski, B. Wundheiler, A. Yushkov, O. Zapparrata, E. Zas, D. Zavrtanik, M. Zavrtanik and L. Zehreret al. (click to show)*: corresponding author
Pre-published on:
October 12, 2021
Published on:
March 18, 2022
Abstract
The Pierre Auger Observatory, located in western Argentina, is the world's largest cosmic-ray observatory. While it was originally built to study the cosmic-ray flux above $10^{18.5}~$eV, several enhancements have reduced this energy threshold. One such enhancement is a surface array composed of a triangular grid of $19$ water-Cherenkov detectors separated by $433~$m (SD-433) to explore the energies down to about $10^{16}~$eV. We are developing two research lines employing the SD-433. Firstly, we will measure the energy spectrum in a region where previous experiments have shown evidence of the second knee. Secondly, we will search for ultra-high energy photons to study PeV cosmic-ray sources residing in the Galactic center. In this work, we introduce the SD-433 and we show that it is fully efficient above $5\times 10^{16}~$eV for hadronic primaries with $\theta < 45^\circ$. Using seven years of data, we present the parametrization of the lateral distribution function of measured signals. Finally, we show that an angular resolution of $1.8^\circ$ ($0.5^\circ$) can be attained at the lowest (highest) primary energies.
Our study lays the goundmark for measurements in the energy range above $10^{16}~$eV by utilizing the SD-433 and thus expanding the scientific output of the Auger surface detector.
DOI: https://doi.org/10.22323/1.395.0224
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