The Pierre Auger Observatory: Contributions to the 34th International Cosmic Ray Conference (ICRC 2015) / Pierre Auger Collaboration (Alexander Aab (Siegen U.); Pedro Abreu (LIP; Lisbon & Lisbon; IST); Marco Aglietta (IFSI; Turin); Eun-Joo Ahn (Fermilab); Imen Al Samarai (Orsay; IPN); Ivone Albuquerque (Sao Paulo U.); Ingomar Allekotte (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Patrick Allison (Ohio State U.); Alejandro Almela (U. Tech. Natl.; Argentina); Jesus Alvarez Castillo (Mexico U.); Jaime Alvarez-Muñiz (Santiago de Compostela U.); Rafael Alves Batista (Hamburg U.; Inst. Theor. Phys. II); Michelangelo Ambrosio (Naples U. & INFN; Naples); Amin Aminaei (Nijmegen U.; IMAPP); Gioacchino Alex Anastasi (Catania U. & INFN; Catania); Luis Anchordoqui (Lehman Coll.); Sofia Andringa (LIP; Lisbon & Lisbon; IST); Carla Aramo (Naples U. & INFN; Naples); Fernando Arqueros (Madrid U.); Nicusor Arsene (Bucharest U.); Hernán Gonzalo Asorey (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche & Cantabria U.; Santander); Pedro Assis (LIP; Lisbon & Lisbon; IST); Julien Aublin (Paris U.; VI-VII); Gualberto Avila (Pierre Auger Observ.); Nafiun Awal (New York U.); Alina Mihaela Badescu (Bucharest; Polytechnic Inst.); Colin Baus (Karlsruhe U.; EKP); Jim Beatty (Ohio State U.); Karl Heinz Becker (Wuppertal U.); Jose A Bellido (Adelaide U.); Corinne Berat (LPSC; Grenoble); Mario Edoardo Bertaina (IFSI; Turin); Xavier Bertou (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Peter Biermann (Bonn; Max Planck Inst.; Radioastron.); Pierre Billoir (Paris U.; VI-VII); Simon G Blaess (Adelaide U.); Alberto Blanco (LIP; Lisbon & Lisbon; IST); Miguel Blanco (Paris U.; VI-VII); Jiri Blazek (Prague; Inst. Phys.); Carla Bleve (Salento U. & INFN; Lecce); Hans Blümer (KIT; Karlsruhe; IKP & KIT; Karlsruhe; IKP); Martina Boháčová (Prague; Inst. Phys.); Denise Boncioli (Gran Sasso); Carla Bonifazi (Rio de Janeiro Federal U.); Nataliia Borodai (Cracow; INP); Jeffrey Brack (Colorado State U.); Iliana Brancus (Bucharest; IFIN-HH); Thomas Bretz (Aachen; Tech. Hochsch.); Ariel Bridgeman (KIT; Karlsruhe; IKP); Pedro Brogueira (LIP; Lisbon & Lisbon; IST); Peter Buchholz (Siegen U.); Antonio Bueno (Granada U. & CAFPE; Granada); Stijn Buitink (Nijmegen U.; IMAPP); Mario Buscemi (Naples U. & INFN; Naples); Karen S Caballero-Mora (Unlisted; FR); Barbara Caccianiga (Milan U. & INFN; Milan); Lorenzo Caccianiga (Paris U.; VI-VII); Marina Candusso (Rome U.; Tor Vergata & INFN; Rome2); Laurentiu Caramete (Bucharest; Inst. Space Sciences); CARUSO R; Antonella Castellina (IFSI; Turin); Gabriella Cataldi (Salento U. & INFN; Lecce); Lorenzo Cazon (LIP; Lisbon & Lisbon; IST); Rosanna Cester (Turin U. & INFN; Turin); Alan G Chavez (IFM-UMSNH; Michoacan); Andrea Chiavassa (IFSI; Turin); Jose Augusto Chinellato (Campinas State U.); Jiri Chudoba (Prague; Inst. Phys.); Marco Cilmo (Naples U. & INFN; Naples); Roger W Clay (Adelaide U.); Giuseppe Cocciolo (Salento U. & INFN; Lecce); Roberta Colalillo (Naples U. & INFN; Naples); Alan Coleman (Penn State U.); Laura Collica (Milan U. & INFN; Milan); Maria Rita Coluccia (Salento U. & INFN; Lecce); Ruben Conceição (LIP; Lisbon & Lisbon; IST); Fernando Contreras (Pierre Auger Observ.); Mathew J Cooper (Adelaide U.); Alain Cordier (Orsay; LAL); Stephane Coutu (Penn State U.); Corbin Covault (Case Western Reserve U.); James Cronin (Chicago U.; EFI); Richard Dallier (SUBATECH; Nantes & Station Radioastronomy; Nancay); Bruno Daniel (Campinas State U.); Sergio Dasso (Buenos Aires; IAFE & Buenos Aires U.); Kai Daumiller (KIT; Karlsruhe; IKP); Bruce R Dawson (Adelaide U.); Rogerio M de Almeida (Niteroi; Fluminense U.); Sijbrand J de Jong (Nijmegen U.; IMAPP & NIKHEF; Amsterdam); Giuseppe De Mauro (Nijmegen U.; IMAPP); Joao de Mello Neto (Rio de Janeiro Federal U.); Ivan De Mitri (Salento U. & INFN; Lecce); Jaime de Oliveira (Niteroi; Fluminense U.); Vitor de Souza (Sao Paulo U.; Sao Carlos); Luis del Peral (Alcala de Henares U.); Olivier Deligny (Orsay; IPN); Niraj Dhital (Michigan Tech. U.); Claudio Di Giulio (Rome U.; Tor Vergata & INFN; Rome2); Armando Di Matteo (L'Aquila U. & INFN; Aquila); Johana Chirinos Diaz (Michigan Tech. U.); Mary Lucia Díaz Castro (Campinas State U.); Francisco Diogo (LIP; Lisbon & Lisbon; IST); Carola Dobrigkeit (Campinas State U.); Wendy Docters (Groningen; KVI); Juan Carlos D'Olivo (Mexico U.); Alexei Dorofeev (Colorado State U.); Qader Dorosti Hasankiadeh (KIT; Karlsruhe; IKP); Rita dos Anjos (Sao Paulo U.; Sao Carlos); Maria Teresa Dova (La Plata U.); Jan Ebr (Prague; Inst. Phys.); Ralph Engel (KIT; Karlsruhe; IKP); Martin Erdmann (Aachen; Tech. Hochsch.); Mona Erfani (Siegen U.); Carlos O Escobar (Fermilab & Campinas State U.); Joao Espadanal (LIP; Lisbon & Lisbon; IST); Alberto Etchegoyen (U. Tech. Natl.; Argentina); Heino Falcke (Nijmegen U.; IMAPP & ASTRON; Dwingeloo & NIKHEF; Amsterdam); Ke Fang (Chicago U.; EFI); Glennys Farrar (New York U.); Anderson Fauth (Campinas State U.); Norberto Fazzini (Fermilab); Andrew P Ferguson (Case Western Reserve U.); Brian Fick (Michigan Tech. U.); Juan Manuel Figueira; Alberto Filevich; Andrej Filipčič (Stefan Inst.; Ljubljana & Nova Gorica U.); Octavian Fratu (Bucharest; Polytechnic Inst.); Martín Miguel Freire (IFIR; Rosario & Rosario U.); Toshihiro Fujii (Chicago U.; EFI); Beatriz García (Natl. Tech. U.; San Rafael); Diego García-Gámez (Orsay; LAL); Diego Garcia-Pinto (Madrid U.); Florian Gate (SUBATECH; Nantes); Hartmut Gemmeke (KIT; Karlsruhe; IPE); Alexandru Gherghel-Lascu (Bucharest; IFIN-HH); Piera Luisa Ghia (Paris U.; VI-VII); Ugo Giaccari (Rio de Janeiro Federal U.); Marco Giammarchi (Milan U. & INFN; Milan); Maria Giller; Dariusz Głas (Lodz U.); Christian Glaser (Aachen; Tech. Hochsch.); Henry Glass (Fermilab); Geraldina Golup; Mariano Gómez Berisso (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Primo F Gómez Vitale (Pierre Auger Observ.); Nicolás González; Ben Gookin (Colorado State U.); Jacob Gordon (Ohio State U.); Alessio Gorgi (IFSI; Turin); Peter Gorham (Hawaii U.); Philippe Gouffon (Sao Paulo U.); Nathan Griffith (Ohio State U.); Aurelio Grillo (Gran Sasso); Trent D Grubb (Adelaide U.); Fausto Guarino (Naples U. & INFN; Naples); Germano Guedes (UEFS; Feira de Santana); Matías Rolf Hampel; Patricia Hansen (La Plata U.); Diego Harari (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Thomas A Harrison (Adelaide U.); Sebastian Hartmann (Aachen; Tech. Hochsch.); John Harton (Colorado State U.); Andreas Haungs (KIT; Karlsruhe; IKP); Thomas Hebbeker (Aachen; Tech. Hochsch.); Dieter Heck (KIT; Karlsruhe; IKP); Philipp Heimann (Siegen U.); Alexander E Hérve (KIT; Karlsruhe; IKP); Gary C Hill (Adelaide U.); Carlos Hojvat (Fermilab); Nicholas Hollon (Chicago U.; EFI); Ewa Holt (KIT; Karlsruhe; IKP); Piotr Homola (Wuppertal U.); Jörg Hörandel (Nijmegen U.; IMAPP & NIKHEF; Amsterdam); Pavel Horvath (Palacky U.); Miroslav Hrabovský (Palacky U. & Prague; Inst. Phys.); Daniel Huber (Karlsruhe U.; EKP); Tim Huege (KIT; Karlsruhe; IKP); Antonio Insolia (Catania U. & INFN; Catania); Paula Gina Isar (Bucharest; Inst. Space Sciences); Ingolf Jandt (Wuppertal U.); Stefan Jansen (Nijmegen U.; IMAPP & NIKHEF; Amsterdam); Cecilia Jarne (La Plata U.); Jeffrey A Johnsen (Colorado School of Mines); Mariela Josebachuili; Alex Kääpä (Wuppertal U.); Olga Kambeitz (Karlsruhe U.; EKP); Karl Heinz Kampert (Wuppertal U.); Peter Kasper (Fermilab); Igor Katkov (Karlsruhe U.; EKP); Bianca Keilhauer (KIT; Karlsruhe; IKP); Ernesto Kemp (Campinas State U.); Roger Kieckhafer (Michigan Tech. U.); Hans Klages (KIT; Karlsruhe; IKP); Matthias Kleifges (KIT; Karlsruhe; IPE); Jonny Kleinfeller (Pierre Auger Observ.); Raphael Krause (Aachen; Tech. Hochsch.); Nicole Krohm (Wuppertal U.); Daniel Kuempel (Aachen; Tech. Hochsch.); Gasper Kukec Mezek (Nova Gorica U.); Norbert Kunka (KIT; Karlsruhe; IPE); Alaa Metwaly Kuotb Awad (KIT; Karlsruhe; IKP); Danielle LaHurd (Case Western Reserve U.); Luca Latronico (IFSI; Turin); Robert Lauer (New Mexico U.); Markus Lauscher (Aachen; Tech. Hochsch.); Pascal Lautridou (SUBATECH; Nantes); Sandra Le Coz; Didier Lebrun (LPSC; Grenoble); Paul Lebrun (Fermilab); Marcelo Augusto Leigui de Oliveira (ABC Federal U.); Antoine Letessier-Selvon (Paris U.; VI-VII); Isabelle Lhenry-Yvon (Orsay; IPN); Katrin Link (Karlsruhe U.; EKP); Luis Lopes (LIP; Lisbon & Lisbon; IST); Rebeca López (Puebla U.; Inst. Fis.); Aida López Casado (Santiago de Compostela U.); Karim Louedec (LPSC; Grenoble); Agustin Lucero; Max Malacari (Adelaide U.); Manuela Mallamaci (Milan U. & INFN; Milan); Jennifer Maller (SUBATECH; Nantes); Dusan Mandat (Prague; Inst. Phys.); Paul Mantsch (Fermilab); Analisa Mariazzi (La Plata U.); Vincent Marin (SUBATECH; Nantes); Ioana Mariş (Granada U. & CAFPE; Granada); Giovanni Marsella; Daniele Martello (Salento U. & INFN; Lecce); Humberto Martinez (CINVESTAV; IPN); Oscar Martínez Bravo (Puebla U.; Inst. Fis.); Diane Martraire (Orsay; IPN); Jimmy Masías Meza (Buenos Aires U.); Hermann-Josef Mathes (KIT; Karlsruhe; IKP); Sebastian Mathys (Wuppertal U.); James Matthews (Louisiana State U.); John Matthews (New Mexico U.); Giorgio Matthiae (Rome U.; Tor Vergata & INFN; Rome2); Daniela Maurizio (Rio de Janeiro; CBPF); Eric Mayotte (Colorado School of Mines); Peter Mazur (Fermilab); Carlos Medina (Colorado School of Mines); Gustavo Medina-Tanco (Mexico U.); Rebecca Meissner (Aachen; Tech. Hochsch.); Victor Mello (Rio de Janeiro Federal U.); Diego Melo; Alexander Menshikov (KIT; Karlsruhe; IPE); Stefano Messina (Groningen; KVI); Maria Isabel Micheletti (IFIR; Rosario & Rosario U.); Lukas Middendorf (Aachen; Tech. Hochsch.); Ignacio A Minaya (Madrid U.); Lino Miramonti (Milan U. & INFN; Milan); Bogdan Mitrica (Bucharest; IFIN-HH); Laura Molina-Bueno (Granada U. & CAFPE; Granada); Silvia Mollerach (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); François Montanet (LPSC; Grenoble); Carlo Morello (IFSI; Turin); Miguel Mostafá (Penn State U.); Celio A Moura (ABC Federal U.); Marcio Aparecido Muller (Campinas State U.); Gero Müller (Aachen; Tech. Hochsch.); Sarah Müller (KIT; Karlsruhe; IKP); Sergio Navas (Granada U. & CAFPE; Granada); Petr Necesal (Prague; Inst. Phys.); Lukas Nellen (Mexico U.); Anna Nelles (Nijmegen U.; IMAPP & NIKHEF; Amsterdam); Jens Neuser (Wuppertal U.); Phong H Nguyen (Adelaide U.); Mihai Niculescu-Oglinzanu (Bucharest; IFIN-HH); Marcus Niechciol (Siegen U.); Lukas Niemietz (Wuppertal U.); Tim Niggemann (Aachen; Tech. Hochsch.); Dave Nitz (Michigan Tech. U.); Dalibor Nosek; Vladimir Novotny (Charles U.); Lyberis Nožka (Palacky U.); Luis Núñez (Cantabria U.; Santander); Livingstone Ochilo (Siegen U.); Foteini Oikonomou (Penn State U.); Angela Olinto (Chicago U.; EFI); Noelia Pacheco (Alcala de Henares U.); Daniel Pakk Selmi-Dei (Campinas State U.); Miroslav Palatka (Prague; Inst. Phys.); Juan Pallotta (LIDAR CITEFA); Philipp Papenbreer (Wuppertal U.); Gonzalo Parente (Santiago de Compostela U.); Alejandra Parra (Puebla U.; Inst. Fis.); Thomas Paul (Lehman Coll. & Northeastern U.); Miroslav Pech (Prague; Inst. Phys.); Jan Pękala (Cracow; INP); Rodrigo Pelayo (Ulisted; MX); Iuri Pepe (Bahia U.); Lorenzo Perrone (Salento U. & INFN; Lecce); Emily Petermann (Nebraska U.); Christine Peters (Aachen; Tech. Hochsch.); Sergio Petrera (L'Aquila U. & INFN; Aquila); Yevgeniy Petrov (Colorado State U.); Jamyang Phuntsok (Penn State U.); Ricardo Piegaia (Buenos Aires U.); Tanguy Pierog (KIT; Karlsruhe; IKP); Pablo Pieroni (Buenos Aires U.); Mário Pimenta (LIP; Lisbon & Lisbon; IST); Valerio Pirronello (Catania U. & INFN; Catania); Manuel Platino; Matthias Plum (Aachen; Tech. Hochsch.); Alessio Porcelli (KIT; Karlsruhe; IKP); Czeslaw Porowski (Cracow; INP); Raul Ribeiro Prado (Sao Paulo U.; Sao Carlos); Paolo Privitera (Chicago U.; EFI); Michael Prouza (Prague; Inst. Phys.); Eduardo J Quel (LIDAR CITEFA); Sven Querchfeld (Wuppertal U.); Sean Quinn (Case Western Reserve U.); Julian Rautenberg (Wuppertal U.); Olivier Ravel (SUBATECH; Nantes); Diego Ravignani; Darius Reinert (Aachen; Tech. Hochsch.); Benoît Revenu (SUBATECH; Nantes); Jan Ridky (Prague; Inst. Phys.); Markus Risse (Siegen U.); Pablo Ristori (LIDAR CITEFA); Vincenzo Rizi (L'Aquila U. & INFN; Aquila); Washington Rodrigues de Carvalho (Santiago de Compostela U.); Jorge Rubén Rodriguez Rojo (Pierre Auger Observ.); Maria Dolores Rodríguez-Frías (Alcala de Henares U.); Dmytro Rogozin (KIT; Karlsruhe; IKP); Jaime Rosado (Madrid U.); Markus Roth (KIT; Karlsruhe; IKP); Esteban Roulet (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Adrian Rovero (Buenos Aires; IAFE); Steven J Saffi (Adelaide U.); Alexandra Saftoiu (Bucharest; IFIN-HH); Francesco Salamida (Orsay; IPN); Humberto Salazar (Puebla U.; Inst. Fis.); Ahmed Saleh (Nova Gorica U.); Francisco Salesa Greus (Penn State U.); Gaetano Salina (Rome U.; Tor Vergata & INFN; Rome2); Jose Sanabria Gomez (Cantabria U.; Santander); Federico Sánchez; Patricia Sanchez-Lucas (Granada U. & CAFPE; Granada); Edivaldo Moura Santos (Sao Paulo U.); Eva Santos (Campinas State U.); Fred Sarazin (Colorado School of Mines); Biswaijt Sarkar (Wuppertal U.); Raul Sarmento (LIP; Lisbon & Lisbon; IST); Christian Sarmiento-Cano (Cantabria U.; Santander); Ricardo Sato; Carlos Scarso (Pierre Auger Observ.); Markus Schauer (Wuppertal U.); Viviana Scherini (Salento U. & INFN; Lecce); Harald Schieler; David Schmidt (KIT; Karlsruhe; IKP); Olaf Scholten (Groningen; KVI); Harm Schoorlemmer (Hawaii U.); Petr Schovánek (Prague; Inst. Phys.); Frank G Schröder; Alexander Schulz (KIT; Karlsruhe; IKP); Johannes Schulz (Nijmegen U.; IMAPP); Johannes Schumacher (Aachen; Tech. Hochsch.); Sergio Sciutto (La Plata U.); Alberto Segreto (IASF; Palermo); Mariangela Settimo (Paris U.; VI-VII); Amir Shadkam (Louisiana State U.); Ronald C Shellard (Rio de Janeiro; CBPF); Guenter Sigl (Hamburg U.; Inst. Theor. Phys. II); Octavian Sima (Bucharest U.); Andrzej Śmiałkowski (Lodz U.); Radomir Šmída (KIT; Karlsruhe; IKP); Gregory Snow (Nebraska U.); Paul Sommers (Penn State U.); Sebastian Sonntag (Siegen U.); J Sorokin (Adelaide U.); Ruben Squartini (Pierre Auger Observ.); Yogendra N Srivastava (Northeastern U.); Denis Stanca (Bucharest; IFIN-HH); Samo Stanič (Nova Gorica U.); James Stapleton (Ohio State U.); Jaroslaw Stasielak (Cracow; INP); Maurice Stephan (Aachen; Tech. Hochsch.); Anne Stutz (LPSC; Grenoble); Federico Suarez (U. Tech. Natl.; Argentina); Mauricio Suarez Durán (Cantabria U.; Santander); Tiina Suomijärvi (Orsay; IPN); A Daniel Supanitsky (Buenos Aires; IAFE); Michael Sutherland (Ohio State U.); John Swain (Northeastern U.); Zbigniew Szadkowski (Lodz U.); Oscar Alejandro Taborda (Centro Atomico Bariloche & Balseiro Inst.; San Carlos de Bariloche); Alex Tapia; Andreas Tepe (Siegen U.); Vanessa Menezes Theodoro (Campinas State U.); Omar Tibolla (Unlisted; FR); Charles Timmermans (Nijmegen U.; IMAPP & NIKHEF; Amsterdam); Carlos J Todero Peixoto; Gabriel Toma (Bucharest; IFIN-HH); Lenka Tomankova (KIT; Karlsruhe; IKP); Bernardo Tomé (LIP; Lisbon & Lisbon; IST); Aurelio Tonachini (Turin U. & INFN; Turin); Guillermo Torralba Elipe (Santiago de Compostela U.); Diego Torres Machado (Rio de Janeiro Federal U.); Petr Travnicek (Prague; Inst. Phys.); Marta Trini (Nova Gorica U.); Ralf Ulrich (KIT; Karlsruhe; IKP); Michael Unger (KIT; Karlsruhe; IKP & KIT; Karlsruhe; IKP); Martin Urban (Aachen; Tech. Hochsch.); Jose F Valdés Galicia (Mexico U.); Ines Valiño (Santiago de Compostela U.); Laura Valore (Naples U. & INFN; Naples); Guus van Aar (Nijmegen U.; IMAPP); Patrick van Bodegom (Adelaide U.); Ad M van den Berg (Groningen; KVI); Sjoert van Velzen (Nijmegen U.; IMAPP); Arjen van Vliet (Hamburg U.; Inst. Theor. Phys. II); Enrique Varela (Puebla U.; Inst. Fis.); Bernardo Vargas Cárdenas (Mexico U.); Gary Varner (Hawaii U.); Rafael Vasquez (Rio de Janeiro Federal U.); Jose R Vázquez (Madrid U.); Ricardo Vázquez (Santiago de Compostela U.); Darko Veberič (KIT; Karlsruhe; IKP); Valerio Verzi (Rome U.; Tor Vergata & INFN; Rome2); Jakub Vicha (Prague; Inst. Phys.); Mariela Videla; Luis Villaseñor (IFM-UMSNH; Michoacan); Brian Vlcek (Alcala de Henares U.); Serguei Vorobiov (Nova Gorica U.); Hernan Wahlberg (La Plata U.); Oscar Wainberg (U. Tech. Natl.; Argentina); David Walz (Aachen; Tech. Hochsch.); Alan Watson; Marc Weber (KIT; Karlsruhe; IPE); Klaus Weidenhaupt (Aachen; Tech. Hochsch.); Andreas Weindl (KIT; Karlsruhe; IKP); Christoph Welling (Aachen; Tech. Hochsch.); Felix Werner (Karlsruhe U.; EKP); Allan Widom (Northeastern U.); Lawrence Wiencke (Colorado School of Mines); Henryk Wilczyński (Cracow; INP); Tobias Winchen; David Wittkowski (Wuppertal U.); Brian Wundheiler; Sarka Wykes (Nijmegen U.; IMAPP); Lili Yang (Nova Gorica U.); Tolga Yapici (Michigan Tech. U.); Alexey Yushkov (Siegen U.); Enrique Zas (Santiago de Compostela U.); Danilo Zavrtanik (Nova Gorica U. & Stefan Inst.; Ljubljana); Marko Zavrtanik (Stefan Inst.; Ljubljana & Nova Gorica U.); Arnulfo Zepeda (CINVESTAV; IPN); Benedikt Zimmermann (KIT; Karlsruhe; IPE); Michael Ziolkowski (Siegen U.); Francesca Zuccarello (Catania U. & INFN; Catania) ). - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - (2015). ((Intervento presentato al convegno 34th International Cosmic Ray Conference ICRC2015 tenutosi a The Hague, The Netherlands nel 30 July - 6 August 2015.