# Trigger and aperture of the surface detector array of the pierre auger observatory

@article{Abraham2010TriggerAA, title={Trigger and aperture of the surface detector array of the pierre auger observatory}, author={J. Abraham and P. Abreu and M. Aglietta and C. Aguirre and E. Ahn and D. Allard and I. Allekotte and J. Allen and J. {\'A}lvarez-Mu{\~n}iz and M. Ambrosio and L. Anchordoqui and S. Andringa and A. Anzalone and C. Aramo and E. Arganda and S. Argir{\`o} and K. Arisaka and F. Arneodo and F. Arqueros and T. Asch and H. Asorey and P. Assis and J. Aublin and M. Ave and G. Avila and T. Backer and D. Badagnani and K. B. Barber and A. F. Barbosa and S. Barroso and B. Baughman and P. Bauleo and J. Beatty and T. Beau and B. Becker and K. Becker and A. Bell'etoile and J. Bellido and S. BenZvi and C. Berat and P. Bernardini and X. Bertou and P. Biermann and P. Billoir and O. Blanch-Bigas and F. Blanco and C. Bleve and H. Blumer and M. Boh'avcov'a and D. Boncioli and C. Bonifazi and R. Bonino and N. Borodai and J. Brack and P. Brogueira and W. C. Brown and R. Bruijn and P. Buchholz and A. Bueno and R. Burton and N. Busca and K. S. Caballero-Mora and L. Caramete and R. Caruso and W. Carvalho and A. Castellina and O. Catalano and L. Cazon and R. Cester and J. Chauvin and A. Chiavassa and J. Chinellato and A. Chou and J. Chudoba and J. Chye and R. Clay and E. Colombo and R. Conceiccao and B. Connolly and F. Contreras and J. Coppens and A. Cordier and U. Cotti and S. Coutu and C. Covault and A. Creusot and A. Criss and J. Cronin and A. Curutiu and S. Dagoret-Campagne and R. Dallier and K. Daumiller and B. Dawson and R. Almeida and M. Domenico and C. Donato and S. Jong and G. Vega and W. D. M. Junior and J. M. Neto and I. Mitri and V. Souza and K. D. Vries and G. Decerprit and L. Peral and O. Deligny and A. Selva and C. Fratte and H. Dembinski and C. Giulio and J. C. Diaz and P. Diệp and C. Dobrigkeit and J. D'Olivo and P. N. Dong and A. Dorofeev and J. Anjos and M. Dova and D. D'urso and I. Duţan and M. DuVernois and R. Engel and M. Erdmann and C. Escobar and A. Etchegoyen and P. S. Luis and H. Falcke and G. Farrar and A. Fauth and N. Fazzini and F. Ferrer and A. Ferrero and B. Fick and A. Filevich and A. Filipvcivc and I. Fleck and S. Fliescher and C. Fracchiolla and E. Fraenkel and W. Fulgione and R. F. Gamarra and S. Gambetta and B. Garc'ia and D. G{\'a}mez and D. Garc{\'i}a-Pinto and X. Garrido and G. Gelmini and H. Gemmeke and P. Ghia and U. Giaccari and M. Giller and H. Glass and L. Goggin and M. Gold and G. Golup and F. G. Albarrac{\'i}n and M. G. Berisso and P. Gonccalves and M. G. Amaral and D. Gonzalez and J. G. Gonzalez and D. G'ora and A. Gorgi and P. Gouffon and S. Gozzini and E. Grashorn and S. Grebe and M. Grigat and A. Grillo and Y. Guardincerri and F. Guarino and G. Guedes and J. Guti'errez and J. Hague and V. Halenka and P. Hansen and D. Harari and S. Harmsma and J. Harton and A. Haungs and M. Healy and T. Hebbeker and G. Hebrero and D. Heck and C. Hojvat and V. C. Holmes and P. Homola and J. Horandel and A. Horneffer and M. Hrabovsk'y and T. Huege and M. Hussain and M. Iarlori and A. Insolia and F. Ionita and A. Italiano and S. Jiraskova and M. Kaducak and K. Kampert and T. Karova and P. Kasper and B. K'egl and B. Keilhauer and E. Kemp and R. Kieckhafer and H. Klages and M. Kleifges and J. Kleinfeller and R. Knapik and J. Knapp and D. Koang and A. Krieger and O. Kromer and D. Kruppke-Hansen and F. Kuehn and D. Kuempel and K. Kulbartz and N. Kunka and A. Kusenko and G. Rosa and C. Lachaud and B. Lago and P. Lautridou and M. Leao and D. Lebrun and P. Lebrun and J. Lee and M. Oliveira and A. Lemi{\`e}re and A. Letessier-Selvon and M. Leuthold and I. Lhenry-Yvon and R. L'opez and A. Aguera and K. Louedec and J. Bahilo and A. Lucero and H. Lyberis and M. Maccarone and C. Macolino and S. Maldera and D. Mand{\'a}t and P. Mantsch and A. Mariazzi and I. Maris and H. M. Falcon and D. Martello and O. Bravo and H. Mathes and J. Matthews and G. Matthiae and D. Maurizio and P. Mazur and M. Mcewen and R. Mcneil and G. Medina-Tanco and M. Melissas and D. Melo and E. Menichetti and A. Menshikov and R. Meyhandan and M. Micheletti and G. Miele and W. Miller and L. Miramonti and S. Mollerach and M. Monasor and D. Ragaigne and F. Montanet and B. Morales and C. Morello and J. Moreno and C. Morris and M. Mostaf'a and C. Moura and S. M{\"u}ller and M. Muller and R. Mussa and G. Navarra and J. L. Navarro and S. Navas and P. Ne{\vc}esal and L. Nellen and C. Newman-Holmes and D. Newton and P. T. Nhung and N. Nierstenhoefer and D. Nitz and D. Nosek and L. Novzka and M. Nykl{\'i}{\vc}ek and J. Oehlschlager and A. Olinto and P. Oliva and V. Olmos-Gilbaja and M. Ortiz and N. Pacheco and D. Selmi-Dei and M. Palatka and J. Pallotta and G. Parente and E. Parizot and S. Parlati and S. Pastor and M. Patel and T. Paul and V. Pavlidou and K. Payet and M. Pech and J. Pcekala and I. Pepe and L. Perrone and R. Pesce and E. Petermann and S. Petrera and P. Petrinca and A. Petrolini and Y. Petrov and J. Petrovic and C. Pfendner and R. Piegaia and T. Pierog and M. Pimenta and T. Pinto and V. Pirronello and O. Pisanti and M. Platino and J. Pochon and V. Ponce and M. Pontz and P. Privitera and M. Prouza and E. Quel and J. Rautenberg and O. Ravel and D. Ravignani and A. Redondo and B. Revenu and F. Rezende and J. Ř{\'i}dk{\'y} and S. Riggi and M. Risse and C. Rivi{\`e}re and V. Rizi and C. Robledo and G. Rodriguez and J. Martino and J. Rojo and I. Rodr{\'i}guez-Cabo and M. D. Rodr{\'i}guez-Fr{\'i}as and G. Ros and J. Rosado and T. Rossler and M. Roth and B. Rouill'e-d'Orfeuil and E. Roulet and A. Rovero and F. Salamida and H. Salazar and G. Salina and F. S'anchez and M. Santander and C. E. Santo and E. Santos and F. Sarazin and S. Sarkar and R. Sato and N. Scharf and V. Scherini and H. Schieler and P. Schiffer and A. Schmidt and F. Schmidt and T. Schmidt and O. Scholten and H. Schoorlemmer and J. Schovancova and P. Schov'anek and F. Schroeder and S. Schulte and F. Schussler and D. Schuster and S. Sciutto and M. Scuderi and A. Segreto and D. Semikoz and M. Settimo and R. Shellard and I. Sidelnik and B. B. Siffert and G. Sigl and A. Śmiałkowski and R. vSm'ida and B. Smith and G. Snow and P. Sommers and J. Sorokin and H. Spinka and R. Squartini and E. Strazzeri and A. Stutz and F. Suarez and T. Suomijarvi and A. Supanitsky and M. Sutherland and J. Swain and Z. Szadkowski and A. Tamashiro and A. Tamburro and T. Tarutina and O. Tacscuau and R. Tcaciuc and D. Tcherniakhovski and D. Tegolo and N. Thao and D. Thomas and R. Ticona and J. Tiffenberg and C. Timmermans and W. Tkaczyk and C. Peixoto and B. Tom'e and A. Tonachini and I. Torres and P. Tr{\'a}vn{\'i}{\vc}ek and D. Tridapalli and G. Tristram and E. Trovato and M. Tueros and R. Ulrich and M. Unger and M. Urban and J. Galicia and I. Vali{\~n}o and L. Valore and A. D. Berg and J. R. V'azquez and R. V'azquez and D. Veberivc and A. Velarde and T. Venters and V. Verzi and M. Videla and L. Villase{\~n}or and S. Vorobiov and L. Voyvodic and H. Wahlberg and P. Wahrlich and O. Wainberg and D. Warner and A. A. Watson and S. Westerhoff and B. Whelan and G. Wieczorek and L. Wiencke and B. Wilczy'nska and H. Wilczy'nski and C. Wileman and M. Winnick and H. Wu and B. Wundheiler and T. Yamamoto and P. Younk and G. Yuan and A. Yushkov and E. Zas and D. Zavrtanik and M. Zavrtanik and I. Zaw and A. Zepeda and M. Ziolkowski}, journal={Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment}, year={2010}, volume={613}, pages={29-39} }

The surface detector array of the Pierre Auger Observatory consists of 1600 water-Cherenkov detectors, for the study of extensive air showers (EAS) generated by ultra-high-energy cosmic rays. We describe the trigger hierarchy, from the identification of candidate showers at the level of a single detector, amongst a large background (mainly random single cosmic ray muons), up to the selection of real events and the rejection of random coincidences. Such trigger makes the surface detector array… Expand

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