Publications by Rafael Alves Batista


Studying cosmological γ-ray propagation with the Cherenkov Telescope Array

Proceedings of Science (2017)

F Gaté, RA Batista, J Biteau, J Lefaucheur, S Mangano, M Meyer, Q Piel, S Pita, D Sanchez, I Vovk

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). The measurement of γ-rays originating from active galactic nuclei offers the unique opportunity to study the propagation of very-high-energy photons over cosmological distances. Most prominently, γ-rays interact with the extragalactic background light (EBL) to produce e+e- pairs, imprinting an attenuation signature on γ-ray spectra. The e+e- pairs can also induce electromagnetic cascades whose detectability in γ-rays depends on the intergalactic magnetic field (IGMF). Furthermore, physics beyond the Standard Model such as Lorentz invariance violation (LIV) or oscillations between photons and weakly interacting sub-eV particles (WISPs) could affect the propagation of γ-rays. The future Cherenkov Telescope Array (CTA), with its unprecedented γ-ray source sensitivity, as well as enhanced energy and spatial resolution at very high energies, is perfectly suited to study cosmological effects on γ-ray propagation. Here, we present first results of a study designed to realistically assess the capabilities of CTA to probe the EBL, IGMF, LIV, and WISPs.


Cosmogenic gamma-rays and neutrinos constrain UHECR source models

Proceedings of Science (2017)

A Van Vliet, JR Hörandel, RA Batista

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). Purpose. When ultra-high-energy cosmic rays (UHECRs) propagate through the universe they produce secondary neutrinos as well as photons, electrons and positrons (initiating electromagnetic cascades) in different kinds of interactions. These neutrinos and electromagnetic cascades are detected at Earth as isotropic extragalactic fluxes. The level of these fluxes can be predicted and used to constrain UHECR source models. Methods. The public astrophysical simulation framework CRPropa 3, designed for simulating the propagating extraterrestrial ultra-high energy particles, is ideally suited for this purpose. CRPropa includes all relevant UHECR interactions as well as secondary neutrino and electromagnetic cascade production and propagation. It is designed for high-performance computing and provides the flexibility to scan large parameter ranges of UHECR models. Results. The expected cosmogenic neutrino and gamma-ray spectra depend strongly on the evolution with redshift of the UHECR sources and on the chemical composition of UHECRs at injection. The isotropic diffuse gamma-ray background measured by Fermi/LAT is already close to touching upon a model with co-moving source evolution and with the chemical composition, spectral index and maximum acceleration energy optimized to provide the best fit to the UHECR spectrum and composition measured by the Pierre Auger Collaboration. Additionally, the detectable fraction of protons present at the highest energies in UHECRs is shown as a function of the evolution of UHECR sources for a range of sensitivities of neutrino detectors at an energy of ∼ 1 EeV. Conclusions. Neutrino and gamma-ray measurements are starting to constrain realistic UHECR models. Current and future neutrino experiments with sensitivities in the range of ∼ 10-8 - 10-10 GeV cm-2 s-1 sr-1 for the single-flavor neutrino flux at ∼ 1 EeV will be able to significantly constrain the proton fraction for realistic source evolution models.


Morphological properties of blazar-induced gamma-ray haloes

Proceedings of Science (2017)

RA Batista, A Saveliev

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). At TeV energies and above gamma rays can induce electromagnetic cascades, whose charged component is sensitive to intervening intergalactic magnetic fields (IGMFs). When interpreting gamma-ray measurements in the energy range between a few GeV and hundreds of TeV, one has to carefully account for effects due to IGMFs, which depend on their strength and power spectrum. Therefore, gamma-ray-induced electromagnetic cascades can be used as probes of cosmic magnetism, since their arrival distribution as well as spectral and temporal properties can provide unique information about IGMFs, whose origin and properties are currently poorly understood. In this contribution we present an efficient three-dimensional Monte Carlo code for simulations of gamma-ray propagation. We focus on the effects of different configurations of IGMFs, in particular magnetic helicity and the power spectrum of stochastic fields, on the morphology of the arrival directions of gamma rays, and discuss the prospects for detecting pair haloes around distant blazars.


The Giant Radio Array for Neutrino Detection (GRAND): Present and perspectives

Proceedings of Science (2017)

K Fang, J Álvarez-Muñiz, RA Batista, M Bustamante, W Carvalho, D Charrier, I Cognard, S De Jong, KD De Vries, C Finley, Q Gou, J Gu, C Guépin, J Hanson, H Hu, K Kotera, S Le Coz, Y Mao, O Martineau-Huynh, C Medina, M Mostafa, F Mottez, K Murase, V Niess, F Oikonomou, F Schröder, C Tasse, C Timmermans, N Renault-Tinacci, M Tueros, XP Wu, P Zarka, A Zech, Y Zhang, Q Zheng, A Zilles

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). The Giant Radio Array for Neutrino Detection (GRAND) aims at detecting ultra-high energy extraterrestrial neutrinos via the extensive air showers induced by the decay of tau leptons created in the interaction of neutrinos under the Earth's surface. Consisting of an array of ∼105 radio antennas deployed over ∼2 × 105km2, GRAND plans to reach, for the first time, an all-flavor sensitivity of ∼1.5 × 10-10GeVcm-2 s-1 sr-1 above 5 × 1017 eV and a sub-degree angular resolution, beyond the reach of other planned detectors. We describe here preliminary designs and simulation results, plans for the ongoing, staged approach to the construction of GRAND, and the rich research program made possible by GRAND's design sensitivity and angular resolution.


The Giant Radio Array for Neutrino Detection (GRAND): Present and perspectives

Proceedings of Science Part F135186 (2017)

K Fang, J Álvarez-Muñiz, RA Batista, M Bustamante, W Carvalho, D Charrier, I Cognard, S De Jong, KD De Vries, C Finley, Q Gou, J Gu, C Guépin, J Hanson, H Hu, K Kotera, S Le Coz, Y Mao, O Martineau-Huynh, C Medina, M Mostafa, F Mottez, K Murase, V Niess, F Oikonomou, F Schröder, C Tasse, C Timmermans, N Renault-Tinacci, M Tueros, XP Wu, P Zarka, A Zech, Y Zhang, Q Zheng, A Zilles

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). The Giant Radio Array for Neutrino Detection (GRAND) aims at detecting ultra-high energy extraterrestrial neutrinos via the extensive air showers induced by the decay of tau leptons created in the interaction of neutrinos under the Earth's surface. Consisting of an array of ∼10 5 radio antennas deployed over ∼2 × 10 5 km 2 , GRAND plans to reach, for the first time, an all-flavor sensitivity of ∼1.5 × 10 -10 GeVcm -2 s -1 sr -1 above 5 × 10 17 eV and a sub-degree angular resolution, beyond the reach of other planned detectors. We describe here preliminary designs and simulation results, plans for the ongoing, staged approach to the construction of GRAND, and the rich research program made possible by GRAND's design sensitivity and angular resolution.


Studying cosmological γ-ray propagation with the Cherenkov Telescope Array

Proceedings of Science Part F135186 (2017)

F Gaté, RA Batista, J Biteau, J Lefaucheur, S Mangano, M Meyer, Q Piel, S Pita, D Sanchez, I Vovk

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). The measurement of γ-rays originating from active galactic nuclei offers the unique opportunity to study the propagation of very-high-energy photons over cosmological distances. Most prominently, γ-rays interact with the extragalactic background light (EBL) to produce e + e - pairs, imprinting an attenuation signature on γ-ray spectra. The e + e - pairs can also induce electromagnetic cascades whose detectability in γ-rays depends on the intergalactic magnetic field (IGMF). Furthermore, physics beyond the Standard Model such as Lorentz invariance violation (LIV) or oscillations between photons and weakly interacting sub-eV particles (WISPs) could affect the propagation of γ-rays. The future Cherenkov Telescope Array (CTA), with its unprecedented γ-ray source sensitivity, as well as enhanced energy and spatial resolution at very high energies, is perfectly suited to study cosmological effects on γ-ray propagation. Here, we present first results of a study designed to realistically assess the capabilities of CTA to probe the EBL, IGMF, LIV, and WISPs.


Cosmogenic gamma-rays and neutrinos constrain UHECR source models

Proceedings of Science Part F135186 (2017)

A Van Vliet, JR Hörandel, RA Batista

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). Purpose. When ultra-high-energy cosmic rays (UHECRs) propagate through the universe they produce secondary neutrinos as well as photons, electrons and positrons (initiating electromagnetic cascades) in different kinds of interactions. These neutrinos and electromagnetic cascades are detected at Earth as isotropic extragalactic fluxes. The level of these fluxes can be predicted and used to constrain UHECR source models. Methods. The public astrophysical simulation framework CRPropa 3, designed for simulating the propagating extraterrestrial ultra-high energy particles, is ideally suited for this purpose. CRPropa includes all relevant UHECR interactions as well as secondary neutrino and electromagnetic cascade production and propagation. It is designed for high-performance computing and provides the flexibility to scan large parameter ranges of UHECR models. Results. The expected cosmogenic neutrino and gamma-ray spectra depend strongly on the evolution with redshift of the UHECR sources and on the chemical composition of UHECRs at injection. The isotropic diffuse gamma-ray background measured by Fermi/LAT is already close to touching upon a model with co-moving source evolution and with the chemical composition, spectral index and maximum acceleration energy optimized to provide the best fit to the UHECR spectrum and composition measured by the Pierre Auger Collaboration. Additionally, the detectable fraction of protons present at the highest energies in UHECRs is shown as a function of the evolution of UHECR sources for a range of sensitivities of neutrino detectors at an energy of ∼ 1 EeV. Conclusions. Neutrino and gamma-ray measurements are starting to constrain realistic UHECR models. Current and future neutrino experiments with sensitivities in the range of ∼ 10 -8 - 10 -10 GeV cm -2 s -1 sr -1 for the single-flavor neutrino flux at ∼ 1 EeV will be able to significantly constrain the proton fraction for realistic source evolution models.


Morphological properties of blazar-induced gamma-ray haloes

Proceedings of Science Part F135186 (2017)

RA Batista, A Saveliev

© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives 4.0 International License (CC BY-NC-ND 4.0). At TeV energies and above gamma rays can induce electromagnetic cascades, whose charged component is sensitive to intervening intergalactic magnetic fields (IGMFs). When interpreting gamma-ray measurements in the energy range between a few GeV and hundreds of TeV, one has to carefully account for effects due to IGMFs, which depend on their strength and power spectrum. Therefore, gamma-ray-induced electromagnetic cascades can be used as probes of cosmic magnetism, since their arrival distribution as well as spectral and temporal properties can provide unique information about IGMFs, whose origin and properties are currently poorly understood. In this contribution we present an efficient three-dimensional Monte Carlo code for simulations of gamma-ray propagation. We focus on the effects of different configurations of IGMFs, in particular magnetic helicity and the power spectrum of stochastic fields, on the morphology of the arrival directions of gamma rays, and discuss the prospects for detecting pair haloes around distant blazars.


Azimuthal asymmetry in the risetime of the surface detector signals of the Pierre Auger Observatory

PHYSICAL REVIEW D 93 (2016) ARTN 072006

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muniz, RA Batista, M Ambrosio, L Anchordoqui, B Andrada, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, J Blazek, C Bleve, H Blumer, M Bohacova, D Boncioli, C Bonifazi, N Borodai, AM Botti, J Brack, I Brancus, T Bretz, A Bridgeman, FL Briechle, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, A Cancio, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, JCC Diaz, J Chudoba, RW Clay, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceicao, F Contreras, MJ Cooper, S Coutu, CE Covault, J Cronin, R Dallier, S D'Amico, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRTDM Neto, I De Mitri, J de Oliveira, V de Souza, J Debatin, O Deligny, N Dhital, C Di Giulio, A Di Matteo, MLD Castro, F Diogo, C Dobrigkeit, W Docters, JC D'Olivo, A Dorofeev, RC dos Anjos, MT Dova, A Dundovic, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipcic, O Fratu, MM Freire, T Fujii, A Fuster, F Gallo, B Garcia, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Glas, C Glaser, H Glass, G Golup, M Gomez Berisso, PF Gomez Vitale, N Gonzalez, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, JL Harton, Q Hasankiadeh, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Hoerandel, P Horvath, M Hrabovsky, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kaeaepae, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempel, GK Mezek, N Kunka, AK Awad, D LaHurd, L Latronico, M Lauscher, P Lautridou, P Lebrun, MAL de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R Lopez, AL Casado, A Lucero, M Malacari, M Mallamaci, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Maris, G Marsella, D Martello, H Martinez, O Martinez Bravo, JJ Masias Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, VBB Mello, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafa, CA Moura, G Mueller, MA Muller, S Mueller, I Naranjo, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, H Nozka, LA Nunez, L Ochilo, F Oikonomou, A Olinto, DP Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pekala, R Pelayo, J Pena-Rodriguez, IM Pepe, LAS Pereira, L Perrone, E Petermann, C Peters, S Petrera, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, C Porowski, RR Prado, P Privitera, M Prouza, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Ravel, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, WR de Carvalho, JR Rojo, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, FS Greus, G Salina, JDS Gomez, F Sanchez, P Sanchez-Lucas, EM Santos, E Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovanek, FG Schroeder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, C Shellard, G Sigl, O Sima, A Smialkowski, R Smida, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, D Stanca, S Stanic, J Stapleton, J Stasielak, F Strafella, A Stutz, F Suarez, M Suarez Duran, T Sudholz, T Suomijaervi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJT Peixoto, L Tomankova, B Tome, A Tonachini, G Torralba Elipe, DT Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, G van Aar, P van Bodegom, AM van den Berg, A van Vliet, E Varela, B Vargas Cardenas, G Varner, R Vasquez, JR Vazquez, RA Vazquez, D Veberic, V Verzi, J Vicha, M Videla, L Villasenor, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, A Weindl, L Wiencke, H Wilczynski, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, D Yelos, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, Z Zong, F Zuccarello, PA Collaboration


Measurement of the Radiation Energy in the Radio Signal of Extensive Air Showers as a Universal Estimator of Cosmic-Ray Energy.

Physical review letters 116 (2016) 241101-

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muñiz, R Alves Batista, M Ambrosio, A Aminaei, GA Anastasi, L Anchordoqui, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, M Blanco, J Blazek, C Bleve, H Blümer, M Boháčová, D Boncioli, C Bonifazi, N Borodai, J Brack, I Brancus, T Bretz, A Bridgeman, P Brogueira, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, J Chudoba, M Cilmo, RW Clay, G Cocciolo, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceição, F Contreras, MJ Cooper, A Cordier, S Coutu, CE Covault, J Cronin, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, L Del Peral, O Deligny, N Dhital, C Di Giulio, A Di Matteo, JC Diaz, ML Díaz Castro, F Diogo, C Dobrigkeit, W Docters, JC D'Olivo, A Dorofeev, Q Dorosti Hasankiadeh, RC Dos Anjos, MT Dova, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipčič, O Fratu, MM Freire, T Fujii, B García, D Garcia-Gamez, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Głas, C Glaser, H Glass, G Golup, M Gómez Berisso, PF Gómez Vitale, N González, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, S Hartmann, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Hörandel, P Horvath, M Hrabovský, D Huber, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kääpä, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempel, G Kukec Mezek, N Kunka, AW Kuotb Awad, D LaHurd, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R López, A López Casado, K Louedec, A Lucero, M Malacari, M Mallamaci, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Mariş, G Marsella, D Martello, H Martinez, O Martínez Bravo, D Martraire, JJ Masías Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, R Meissner, VBB Mello, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafá, CA Moura, MA Muller, G Müller, S Müller, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nožka, LA Núñez, L Ochilo, F Oikonomou, A Olinto, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pȩkala, R Pelayo, IM Pepe, L Perrone, E Petermann, C Peters, S Petrera, Y Petrov, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, A Porcelli, C Porowski, RR Prado, P Privitera, M Prouza, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Ravel, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, MD Rodríguez-Frías, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, F Salesa Greus, G Salina, JD Sanabria Gomez, F Sánchez, P Sanchez-Lucas, E Santos, EM Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovánek, FG Schröder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, G Sigl, O Sima, A Śmiałkowski, R Šmída, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, YN Srivastava, D Stanca, S Stanič, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, M Suarez Durán, T Suomijärvi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJ Todero Peixoto, G Toma, L Tomankova, B Tomé, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdés Galicia, I Valiño, L Valore, G van Aar, P van Bodegom, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cárdenas, G Varner, R Vasquez, JR Vázquez, RA Vázquez, D Veberič, V Verzi, J Vicha, M Videla, L Villaseñor, B Vlcek, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, C Welling, F Werner, A Widom, L Wiencke, H Wilczyński, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, F Zuccarello, Pierre Auger Collaboration

We measure the energy emitted by extensive air showers in the form of radio emission in the frequency range from 30 to 80 MHz. Exploiting the accurate energy scale of the Pierre Auger Observatory, we obtain a radiation energy of 15.8±0.7(stat)±6.7(syst)  MeV for cosmic rays with an energy of 1 EeV arriving perpendicularly to a geomagnetic field of 0.24 G, scaling quadratically with the cosmic-ray energy. A comparison with predictions from state-of-the-art first-principles calculations shows agreement with our measurement. The radiation energy provides direct access to the calorimetric energy in the electromagnetic cascade of extensive air showers. Comparison with our result thus allows the direct calibration of any cosmic-ray radio detector against the well-established energy scale of the Pierre Auger Observatory.


Nanosecond-level time synchronization of autonomous radio detector stations for extensive air showers

JOURNAL OF INSTRUMENTATION 11 (2016) ARTN P01018

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muniz, RA Batista, M Ambrosio, A Aminaei, GA Anastasi, L Anchordoqui, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, M Blanco, J Blazek, C Bleve, H Bluemer, M Bohacova, D Boncioli, C Bonifazi, N Borodai, J Brack, I Brancus, T Bretz, A Bridgeman, P Brogueira, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, J Chudoba, M Cilmo, RW Clay, G Cocciolo, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceicao, F Contreras, MJ Cooper, A Cordier, S Coutu, CE Covault, J Cronin, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, L del Pera, O Deligny, N Dhita, C Di Giulio, A Di Matteot, JC Diaz, ML Diaz Castro, F Diogo, C Dobrigkeit, W Docters, JC D'Olivo, A Dorofeev, QD Hasankiadeh, RC dos Anjos, MT Dova, J Ebr, R Enge, M Erdmann, M Erfani, CO Escobar, J Eser, J Espadanal, A Etchegoyeng, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipcic, O Fratu, MM Freire, T Fujii, B Garcia, D Garcia-Gamez, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Glas, C Glaser, H Glass, G Golup, M Gomez Berisso, PF Gomez Vitale, N Gonzalez, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, S Hartmann, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hohon, E Holt, P Homola, JR Horandel, P Horvath, M Hrabovsky, D Huber, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kaeaepae, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempe, GK Mezek, N Kunka, AWK Awad, D LaHurd, A Lang, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R Lopez, A Lopez Casado, K Louedec, A Lucero, M Malacari, M Mallamaci, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Maris, G Marsella, D Martello, H Martinez, O Martinez Bravo, D Martraire, JJ Masias Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, R Meissner, VBB Meo, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafa, CA Moura, G Mueller, MA Muller, S Mueller, S Navas, P Necesa, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechcio, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nozka, LA Nunez, L Ochilo, F Oikonomou, A Olinto, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, E Petermann, C Peters, S Petrera, Y Petrov, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirrone, M Platino, M Plum, A Porcelli, C Porowski, RR Prado, R Privitera, M Prouza, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Rave, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, MD Rodriguez-Frias, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, FS Greus, G Salina, JD Sanabria Gomez, F Sanchez, P Sanchez-Lucas, EM Santos, E Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovanek, FG Schroeder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, G Sig, O Sima, A Smialkowski, R Smida, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, YN Srivastava, D Stanca, S Stanic, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, M Suarez Duran, T Suomijaervi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJ Todero Peixoto, G Toma, L Tomankova, B Tome, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, G van Aar, P van Bodegom, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cardenas, G Varner, R Vasquez, JR Vazquez, RA Vazquez, D Veberie, V Verzi, J Vicha, M Videla, L Villasenor, B Vlcek, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, F Werner, A Widom, L Wiencke, H Wilczynski, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, F Zuccarello, PA Collaboration


Prototype muon detectors for the AMIGA component of the Pierre Auger Observatory

JOURNAL OF INSTRUMENTATION 11 (2016) ARTN P02012

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muniz, RA Batista, M Ambrosio, A Aminaei, GA Anastasi, L Anchordoqui, B Andrada, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, M Blanco, J Blazek, C Bleve, H Bluemer, M Bohacova, D Boncioli, C Bonifazi, N Borodai, AM Botti, J Brack, I Brancus, T Bretz, A Bridgeman, P Brogueira, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, J Chudoba, M Cilmo, RW Clay, G Cocciolo, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceicao, F Contreras, MJ Cooper, A Cordier, S Coutu, CE Covault, J Cronin, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, L del Peral, O Deligny, N Dhital, C Di Giulio, A Di Matteo, JC Diaz, ML Diaz Castro, F Diogo, C Dobrigkeit, W Docters, JC D'Olivo, A Dorofeev, QD Hasankiadeh, RC dos Anjos, MT Dova, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipcic, O Fratu, MM Freire, T Fujii, A Fuster, F Gallo, B Garcia, D Garcia-Gamez, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Glas, C Glaser, H Glass, G Golup, MG Berisso, PF Gomez Vitale, N Gonzalez, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, S Hartmann, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Horandel, P Horvath, M Hrabovsky, D Huber, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kaeaepae, Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempel, GK Mezek, N Kunka, AWK Awad, D LaHurd, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R Lopez, A Lopez Casado, K Louedec, A Lucero, M Malacari, M Mallamaci, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Maris, G Marsella, D Martello, H Martinez, O Martinez Bravo, D Martraire, JJ Masias Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, R Meissner, VBB Mello, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafa, CA Moura, G Mueller, MA Muller, S Mueller, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nozka, LA Nunez, L Ochilo, F Oikonomou, A Olinto, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, E Petermann, C Peters, S Petrera, Y Petrov, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, A Porcelli, C Porowski, RR Prado, P Privitera, M Prouza, EJ Quel, S Querchfed, S Quinn, J Rautenberg, O Ravel, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, MD Rodriguez-Frias, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, F Salesa Greus, G Salina, JD Sanabria Gomez, F Sanchez, P Sanchez-Lucas, EM Santos, E Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovanek, FG Schroeder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, G Sigl, O Sima, A Smialkowski, R Smida, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, YN Srivastava, D Stanca, S Stanic, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, M Suarez Duran, T Suomijaervi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJ Todero Peixoto, G Toma, L Tomankova, B Tome, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, G van Aar, P van Bodegom, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cardenas, G Varner, R Vasquez, JR Vazquez, RA Vazquez, D Veberic, V Verzi, J Vicha, M Videla, L Villasenor, B Vlcek, S Vorobiov, H Wahlberg, Wainbereg, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, F Werner, A Widom, L Wiencke, H Wilczynski, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, F Zuccarello, PA Collaboration


Energy estimation of cosmic rays with the Engineering Radio Array of the Pierre Auger Observatory

PHYSICAL REVIEW D 93 (2016) ARTN 122005

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, IFM Albuquerque, I Allekotte, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muniz, RA Batista, M Ambrosio, A Aminaei, GA Anastasi, L Anchordoqui, S Andringa, C Aramo, F Arqueros, N Arsene, H Asorey, P Assis, J Aublin, G Avila, N Awal, AM Badescu, C Baus, JJ Beatty, KH Becker, JA Bellido, C Berat, ME Bertaina, X Bertou, PL Biermann, P Billoir, SG Blaess, A Blanco, M Blanco, J Blazek, C Bleve, H Bluemer, M Bohacova, D Boncioli, C Bonifazi, N Borodai, J Brack, I Brancus, T Bretz, A Bridgeman, P Brogueira, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, M Candusso, L Caramete, R Caruso, A Castellina, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, J Chudoba, M Cilmo, RW Clay, G Cocciolo, R Colalillo, A Coleman, L Collica, MR Coluccia, R Conceciao, F Contreras, MJ Cooper, A Cordier, S Coutu, CE Covault, J Cronin, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, SJ de Jong, G De Mauro, JRTDM Neto, I De Mitri, J de Oliveira, V de Souza, L del Peral, O Deligny, N Dhital, C Di Giulio, A Di Matteo, JC Diaz, ML Diaz Castro, F Diogo, C Dobrigkeit, W Docters, JC D'Olivo, A Dorofeev, QD Hasankiadeh, RC dos Anjos, MT Dova, J Ebr, R Engel, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, B Fick, JM Figueira, A Filevich, A Filipcic, O Fratu, MM Freire, T Fujii, B Garcia, D Garcia-Gamez, D Garcia-Pinto, F Gate, H Gemmeke, A Gherghel-Lascu, PL Ghia, U Giaccari, M Giammarchi, M Giller, D Glas, C Glaser, H Glass, G Golup, M Gomez Berisso, PF Gomez Vitale, N Gonzalez, B Gookin, J Gordon, A Gorgi, P Gorham, P Gouffon, N Griffith, AF Grillo, TD Grubb, F Guarino, GP Guedes, MR Hampel, P Hansen, D Harari, TA Harrison, S Hartmann, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Horandel, P Horvath, M Hrabovsky, D Huber, T Huege, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kaeaepae, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Keilhauer, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, R Krause, N Krohm, D Kuempel, GK Mezek, N Kunka, AWK Awad, D LaHurd, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, L Lopes, R Lopez, A Lopez Casado, K Louedec, A Lucero, M Malacari, M Mallamaci, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Maris, G Marsella, D Martello, H Martinez, O Martinez Bravo, D Martraire, JJ Masias Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, R Meissner, VBB Mello, D Melo, A Menshikov, S Messina, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, F Montanet, C Morello, M Mostafa, CA Moura, MA Muller, G Mueller, S Mueller, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, M Niculescu-Oglinzanu, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nozka, LA Nunez, L Ochilo, F Oikonomou, A Olinto, N Pacheco, D Pakk Selmi-Dei, M Palatka, J Pallotta, P Papenbreer, G Parente, A Parra, T Paul, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, E Petermann, C Peters, S Petrera, Y Petrov, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, A Porcelli, C Porowski, RR Prado, P Privitera, M Prouza, EJ Quel, S Querchfeld, S Quinn, J Rautenberg, O Ravel, D Ravignani, D Reinert, B Revenu, J Ridky, M Risse, P Ristori, V Rizi, W Rodrigues de Carvalho, J Rodriguez Rojo, MD Rodriguez-Frias, D Rogozin, J Rosado, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, H Salazar, A Saleh, FS Greus, G Salina, JD Sanabria Gomez, F Sanchez, P Sanchez-Lucas, E Santos, EM Santos, F Sarazin, B Sarkar, R Sarmento, C Sarmiento-Cano, R Sato, C Scarso, M Schauer, V Scherini, H Schieler, D Schmidt, O Scholten, H Schoorlemmer, P Schovanek, FG Schroeder, A Schulz, J Schulz, J Schumacher, SJ Sciutto, A Segreto, M Settimo, A Shadkam, RC Shellard, G Sigl, O Sima, A Smialkowski, R Smida, GR Snow, P Sommers, S Sonntag, J Sorokin, R Squartini, YN Srivastava, D Stanca, S Stanic, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, M Suarez Duran, T Suomijaervi, AD Supanitsky, MS Sutherland, J Swain, Z Szadkowski, OA Taborda, A Tapia, A Tepe, VM Theodoro, C Timmermans, CJ Todero Peixoto, G Toma, L Tomankova, B Tome, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, M Trini, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, G van Aar, P van Bodegom, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cardenas, G Varner, R Vasquez, JR Vazquez, RA Vazquez, D Veberic, V Verzi, J Vicha, M Videla, L Villasenor, B Vlcek, S Vorobiov, H Wahlberg, O Wainberg, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, C Welling, F Werner, A Widom, L Wiencke, H Wilczynski, T Winchen, D Wittkowski, B Wundheiler, S Wykes, L Yang, T Yapici, A Yushkov, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, B Zimmermann, M Ziolkowski, F Zuccarello, PA Collaboration


Relative likelihood for life as a function of cosmic time

Journal of Cosmology and Astroparticle Physics Institute of Physics 2016 (2016) 040-

A Loeb, R Alves Batista, DJA Sloan

Is life most likely to emerge at the present cosmic time near a star like the Sun? We address this question by calculating the relative formation probability per unit time of habitable Earth-like planets within a fixed comoving volume of the Universe, dP (t)/dt, starting from the first stars and continuing to the distant cosmic future. We conservatively restrict our attention to the context of “life as we know it” and the standard cosmological model, ΛCDM. We find that unless habitability around low mass stars is suppressed, life is most likely to exist near ∼ 0.1M ⊙ stars ten trillion years from now. Spectroscopic searches for biosignatures in the atmospheres of transiting Earth-mass planets around low mass stars will determine whether present-day life is indeed premature or typical from a cosmic perspective.


Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array

Journal of Cosmology and Astroparticle Physics IOP Publishing 2016 (2016) 037-037

J Felde, K Filimonov, C Finley, T Fischer-Wasels, S Flis, C-C Foesig, T Fuchs, TK Gaisser, R Gaior, J Gallagher, L Gerhardt, K Ghorbani, D Gier, L Gladstone, M Glagla, T Gluesenkamp, A Goldschmidt, G Golup, JG Gonzalez, D Gora, D Grant, Z Griffith, A Gross, C Ha, C Haack

This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and study their cross-correlation with the ultrahigh-energy cosmic ray (UHECR) samples as a function of angular separation. We also study their possible directional correlations using a likelihood method stacking the neutrino arrival directions and adopting different assumptions on the size of the UHECR magnetic deflections. Finally, we perform another likelihood analysis stacking the UHECR directions and using a sample of through-going muon tracks optimized for neutrino point-source searches with sub-degree angular resolution. No indications of correlations at discovery level are obtained for any of the searches performed. The smallest of the p-values comes from the search for correlation between UHECRs with IceCube high-energy cascades, a result that should continue to be monitored.


Probing intergalactic magnetic fields with simulations of electromagnetic cascades

Physical Review D American Physical Society 94 (2016) 083005

R Alves Batista, A Saveliev, G Sigl, T Vachaspati

We determine the effect of intergalactic magnetic fields on the distribution of high-energy gamma rays by performing three-dimensional Monte Carlo simulations of the development of gamma-ray-induced electromagnetic cascades in the magnetized intergalactic medium. We employ the so-called “Large Sphere Observer” method to efficiently simulate blazar gamma ray halos. We study magnetic fields with a Batchelor spectrum and with maximal left- and right-handed helicities. We also consider the case of sources whose jets are tilted with respect to the line of sight. We verify the formation of extended gamma ray halos around the source direction, and observe spiral-like patterns if the magnetic field is helical. We apply the Q-statistics to the simulated halos to extract their spiral nature and also propose an alternative method, the S-statistics. Both methods provide a quantitative way to infer the helicity of the intervening magnetic fields from the morphology of individual blazar halos for magnetic field strengths B≳10−15  G and magnetic coherence lengths Lc≳100  Mpc. We show that the S-statistics has a better performance than the Q-statistics when assessing magnetic helicity from the simulated halos.


CRPropa 3—a public astrophysical simulation framework for propagating extraterrestrial ultra-high energy particles

Journal of Cosmology and Astroparticle Physics IOP Publishing (2016)

R Alves Batista, A Dundovic, M Erdmann, K-H Kampert, D Kuempel, G Muller, G Sigl, A van Vliet, D Walz, T Winchen

We present the simulation framework CRPropa version 3 designed for efficient development of astrophysical predictions for ultra-high energy particles. Users can assemble modules of the most relevant propagation effects in galactic and extragalactic space, include their own physics modules with new features, and receive on output primary and secondary cosmic messengers including nuclei, neutrinos and photons. In extension to the propagation physics contained in a previous CRPropa version, the new version facilitates high-performance computing and comprises new physical features such as an interface for galactic propagation using lensing techniques, an improved photonuclear interaction calculation, and propagation in time dependent environments to take into account cosmic evolution effects in anisotropy studies and variable sources. First applications using highlighted features are presented as well.


The Pierre Auger Cosmic Ray Observatory

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 798 (2015) 172-213

A Aab, P Abreu, M Aglietta, EJ Ahn, I Al Samarai, JN Albert, IFM Albuquerque, I Allekotte, J Allen, P Allison, A Almela, J Alvarez Castillo, J Alvarez-Muniz, RA Batista, M Ambrosio, A Aminaei, L Anchordoqui, S Andringa, C Aramo, VM Aranda, S Argiro, K Arisaka, F Arneodo, F Arqueros, T Asch, H Asorey, P Assis, J Aublin, M Ave, M Avenier, G Avila, N Awal, AM Badescu, M Balzer, KB Barber, A Barbosa, N Barenthien, M Barkhausen, J Baeuml, C Baus, J Beatty, KH Becker, JA Bellido, S BenZvi, C Berat, T Bergmann, ME Bertaina, PL Biermann, R Bilhaut, P Billoir, SG Blaes, M Blanco, C Bleve, H Bluemer, M Bohacova, H Bolz, D Boncioli, C Bonifaz, R Bonino, M Boratav, N Borodai, F Bracci, J Brack, I Brancus, A Bridgeman, P Brogueira, WC Brown, P Buchholz, A Bueno, S Buitink, M Buscemi, KS Caballero-Mora, B Caccianiga, L Caccianiga, D Camin, M Candusso, L Caramete, R Caruso, A Castellina, A Castera, G Cataldi, L Cazon, R Cester, AG Chavez, A Chiavassa, JA Chinellato, M Chiosso, J Chudoba, M Cilmo, PDJ Clark, RW Clay, G Cocciolo, R Colalillo, A Coleman, L Collica, E Colombo, S Colonges, MR Coluccia, R Conceicao, F Contreras, MJ Cooper, J Coppens, A Cordier, B Courty, S Coutu, CE Covault, J Cronin, A Curutiu, R Dallier, B Daniel, S Dasso, K Daumiller, BR Dawson, RM de Almeida, M De Domenico, C De Donato, SJ de Jong, JRT de Mello Neto, I De Mitri, J de Oliveira, V de Souza, KD de Vries, L del Peral, O Deligny, H Dembinski, N Dhital, C Di Giulio, A Di Matteo, JC Diaz, ML Diaz Castro, F Diogo, C Dobrigkeit, W Docters, C D'Olivo, P Dolron, A Dorofeev, QD Hasankiadeh, MT Dova, D D'Urso, J Ebr, R Engel, LN Epele, M Erdmann, M Erfani, CO Escobar, J Espadanal, A Etchegoyen, P Facal San Luis, H Falcke, K Fang, G Farrar, AC Fauth, N Fazzini, AP Ferguson, M Fernandes, A Ferrero, B Fick, JM Figueira, A Filevich, A Filipcic, BD Fox, ED Fraenkel, O Fratu, MM Freire, U Froehlich, B Fuchs, W Fulgione, T Fujii, B Garcia, D Garcia-Gamez, D Garcia-Pinto, G Garilli, A Gascon Bravo, F Gate, H Geenen, H Gemmeke, B Genolini, PL Ghia, U Giaccari, M Giammarchi, K Gibbs, M Giller, N Giudice, C Glaser, H Glass, M Gomez Berisso, PF Gomez Vitale, P Goncalves, JG Gonzalez, N Gonzalez, B Gookin, D Gora, J Gordon, A Gorgi, P Gorham, W Gotink, P Gouffon, S Grebe, N Griffith, AF Grillo, TD Grubb, J Grygar, N Guardone, F Guarino, GP Guedes, L Guglielmi, R Habraken, MR Hampel, P Hansen, D Harari, S Harmsma, TA Harrison, S Hartmann, JL Harton, A Haungs, T Hebbeker, D Heck, P Heimann, AE Herve, GC Hill, C Hojvat, N Hollon, E Holt, P Homola, JR Hoerandel, A Horneffer, M Horvat, P Horvath, M Hrabovsky, D Huber, H Hucker, T Huege, M Iarlori, A Insolia, PG Isar, I Jandt, S Jansen, C Jarne, JA Johnsen, M Josebachuili, A Kaeaepae, O Kambeitz, KH Kampert, P Kasper, I Katkov, B Kegl, B Keilhauer, A Keivani, J Kelley, E Kemp, RM Kieckhafer, HO Klages, M Kleifges, J Kleinfeller, J Knapp, A Kopmann, R Krause, N Krohm, O Kroemer, D Kuempel, N Kunka, D LaHurd, L Latronico, R Lauer, M Lauscher, P Lautridou, S Le Coz, MSAB Leao, D Lebrun, P Lebrun, MA Leigui de Oliveira, A Letessier-Selvon, I Lhenry-Yvon, K Link, R Lopez, A Lopez Casado, K Louedec, J Lozano Bahilo, L Lu, A Lucero, M Ludwig, M Malacari, S Maldera, M Mallamaci, J Maller, D Mandat, P Mantsch, AG Mariazzi, V Marin, IC Maris, G Marsella, D Martello, L Martina, H Martinez, N Martinez, O Martinez Bravo, D Martraire, JJ Masias Meza, HJ Mathes, S Mathys, J Matthews, JAJ Matthews, G Matthiae, D Maurel, D Maurizio, E Mayotte, PO Mazur, C Medina, G Medina-Tanco, R Meissner, M Melissas, VBB Mello, D Melo, E Menichetti, A Menshikov, S Messina, R Meyhandan, S Micanovic, MI Micheletti, L Middendorf, IA Minaya, L Miramonti, B Mitrica, L Molina-Bueno, S Mollerach, M Monasor, F Montanet, C Morello, M Mostafa, CA Moura, MA Muller, G Mueller, S Mueller, M Muenchmeyer, R Mussa, G Navarra, S Navas, P Necesal, L Nellen, A Nelles, J Neuser, PH Nguyen, D Nicotra, M Niechciol, L Niemietz, T Niggemann, D Nitz, D Nosek, V Novotny, L Nozka, L Ochilo, T Ohnuki, F Oikonomou, A Olinto, M Oliveira, VM Olmos-Gilbaja, N Pacheco, D PakkSelmi-Dei, M Palatka, J Pallotta, N Palmieri, P Papenbreer, G Parente, A Parra, M Patel, T Paul, M Pech, J Pekala, R Pelayo, IM Pepe, L Perrone, E Petermann, C Peters, S Petrera, P Petrinca, Y Petrov, J Phuntsok, R Piegaia, T Pierog, P Pieroni, M Pimenta, V Pirronello, M Platino, M Plum, A Porcelli, C Porowski, T Porter, J Pouryamout, J Pouthas, RR Prado, P Privitera, M Prouza, CL Pryke, V Purrello, EJ Quel, S Querchfeld, S Quinn, R Randriatoamanana, J Rautenberg, O Ravel, D Ravignani, B Revenua, J Ridky, M Risse, P Ristori, V Rizi, S Robbins, M Roberts, W Rodrigues de Carvalho, G Rodriguez Fernandez, J Rodriguez Rojo, MD Rodriguez-Frias, D Rogozin, G Ros, J Rosado, T Rossler, M Roth, E Roulet, AC Rovero, SJ Saffi, A Saftoiu, F Salamida, H Salazar, A Saleh, F Salesa Greus, G Salina, F Sanchez, P Sanchez-Lucas, CE Santo, E Santos, EM Santos, F Sarazin, B Sarkar, R Sarmento, R Sato, N Scharf, V Scherini, H Schieler, P Schiffer, A Schmidt, D Schmidt, O Scholten, H Schoorlemmer, P Schovanek, F Schreuder, FG Schroeder, A Schulz, J Schulz, F Schuessler, J Schumacher, SJ Sciutto, A Segreto, G Sequeiros, M Settimo, A Shadkam, RC Shellard, I Sidelnik, G Sigl, O Sima, A Smialkowski, R Smida, AGK Smith, GR Snow, P Sommers, J Sorokin, R Speelman, H Spinka, R Squartini, YN Srivastava, S Stanic, J Stapleton, J Stasielak, M Stephan, A Stutz, F Suarez, T Suomijaervi, AD Supanitsky, MS Sutherland, M Sutter, J Swain, Z Szadkowski, M Szuba, OA Taborda, A Tapia, D Tcherniakhovski, A Tepe, VM Theodoro, C Timmermans, W Tkaczyk, CJ Todero Peixoto, G Toma, L Tomankova, B Tome, A Tonachini, G Torralba Elipe, D Torres Machado, P Travnicek, E Trovato, TN Trung, V Tunnicliffe, E Tusi, R Ulrich, M Unger, M Urban, JF Valdes Galicia, I Valino, L Valore, G van Aar, P van Bodegom, AM van den Berg, S van Velzen, A van Vliet, E Varela, B Vargas Cardenas, DM Varnav, G Varner, R Vasquez, JR Vazquez, RA Vazquez, D Veberic, H Verkooijen, V Verzi, J Vicha, M Videla, L Villasenor, G Vitali, B Vlcek, H Vorenholt, S Vorobiov, L Voyvodic, H Wahlberg, O Wainberg, P Walker, D Walz, AA Watson, M Weber, K Weidenhaupt, A Weindl, F Werner, S Westerhoff, A Widom, C Wiebusch, L Wiencke, T Wijnen, B Wilczynska, H Wilczynski, N Wild, T Winchen, D Wittkowski, G Woerner, B Wundheiler, S Wykes, T Yamamoto, T Yapici, G Yuan, A Yushkov, B Zamorano, E Zas, D Zavrtanik, M Zavrtanik, A Zepeda, J Zhou, Y Zhu, MZ Silva, B Zimmermann, M Ziolkowski, F Zuccarello


Effects of uncertainties in simulations of extragalactic UHECR propagation, using CRPropa and SimProp

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2015) ARTN 063

RA Batista, D Boncioli, A di Matteo, A van Vliet, D Walz


The Pierre Auger Observatory: contributions to the 34th International Cosmic Ray Conference (ICRC 2015)

International Cosmic Ray Conference arXiv.org 34th (2015)

A Aab, P Abreu, M Aglietta, R Alves Batista

Contributions of the Pierre Auger Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands

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