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18 18

Evidence for a mixed mass composition at the `ankle' in the cosmic-ray spectrum

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; C. Dobrigkeit; J. C. D'Olivo; A. Dorofeev; R. C. dos Anjos; M. T. Dova; A. Dundovic; J. Ebr; R. Engel; M. Erdmann; M. Erfani; J. Alvarez-Muñiz; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini; B. Fick; J. M. Figueira; M. Ambrosio; A. Filevich; A. Filipčič; O. Fratu; M. M....

eye 18

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We report a first measurement for ultra-high energy cosmic rays of the correlation between the depth of shower maximum and the signal in the water Cherenkov stations of air-showers registered simultaneously by the fluorescence and the surface detectors of the Pierre Auger Observatory. Such a correlation measurement is a unique feature of a hybrid air-shower observatory with sensitivity to both the electromagnetic and muonic components. It allows an accurate determination of the spread of...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1609.08567

Arxiv.org

8 8.0

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

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; J. C. D'Olivo; A. Dorofeev; R. C. dos Anjos; M. T. Dova; A. Dundovic; J. Ebr; R. Engel; J. Alvarez-Muñiz; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini; M. Ambrosio; A. P. Ferguson; B. Fick; J. M. Figueira;...

eye 8

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The azimuthal asymmetry in the risetime of signals in Auger surface detector stations is a source of information on shower development. The azimuthal asymmetry is due to a combination of the longitudinal evolution of the shower and geometrical effects related to the angles of incidence of the particles into the detectors. The magnitude of the effect depends upon the zenith angle and state of development of the shower and thus provides a novel observable, $(\sec \theta)_\mathrm{max}$, sensitive...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1604.00978

Arxiv.org

10 10.0

Testing Hadronic Interactions at Ultrahigh Energies with Air Showers Measured by the Pierre Auger Observatory

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; J. Allen; P. Allison; A. Almela; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; J. C. D'Olivo; A. Dorofeev; R. C. dos Anjos; M. T. Dova; A. Dundovic; J. Ebr; R. Engel; J. Alvarez Castillo; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini; J. Alvarez-Muñiz; A. P. Ferguson; B. Fick; J. M. Figueira; A....

eye 10

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Ultrahigh energy cosmic ray air showers probe particle physics at energies beyond the reach of accelerators. Here we introduce a new method to test hadronic interaction models without relying on the absolute energy calibration, and apply it to events with primary energy 6-16 EeV (E_CM = 110-170 TeV), whose longitudinal development and lateral distribution were simultaneously measured by the Pierre Auger Observatory. The average hadronic shower is 1.33 +- 0.16 (1.61 +- 0.21) times larger than...
Topics: Astrophysics, High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, High Energy...
Source: http://arxiv.org/abs/1610.08509

Arxiv.org

14 14

Muon Counting using Silicon Photomultipliers in the AMIGA detector of the Pierre Auger Observatory

Jun 30, 2018 06/18

eye 14

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AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is composed of three scintillation modules, with a 10 m$^2$ detection area per module. In this paper, a...
Topics: Instrumentation and Detectors, Physics, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1703.06193

Arxiv.org

9 9.0

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

Jun 28, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; J. C. Diaz; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; A. Dorofeev; Q. Dorosti Hasankiadeh; R. C. dos Anjos; M. T. Dova; J. Alvarez-Muñiz; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Eser; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; R. Alves Batista; G. Farrar; A. C. Fauth; N....

eye 9

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To exploit the full potential of radio measurements of cosmic-ray air showers at MHz frequencies, a detector timing synchronization within 1 ns is needed. Large distributed radio detector arrays such as the Auger Engineering Radio Array (AERA) rely on timing via the Global Positioning System (GPS) for the synchronization of individual detector station clocks. Unfortunately, GPS timing is expected to have an accuracy no better than about 5 ns. In practice, in particular in AERA, the GPS clocks...
Topics: High Energy Physics - Experiment, Instrumentation and Detectors, Physics
Source: http://arxiv.org/abs/1512.02216

Arxiv.org

35 35

The Pierre Auger Observatory Upgrade - Preliminary Design Report

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; H. Dembinski; N. Dhital; C. Di Giulio; A. Di Matteo; J. C. Diaz; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; J. Alvarez-Muñiz; A. Dorofeev; Q. Dorosti Hasankiadeh; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; R. Alves Batista; H. Falcke; K. Fang; G....

eye 35

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The Pierre Auger Observatory has begun a major Upgrade of its already impressive capabilities, with an emphasis on improved mass composition determination using the surface detectors of the Observatory. Known as AugerPrime, the upgrade will include new 4 m$^2$ plastic scintillator detectors on top of all 1660 water-Cherenkov detectors, updated and more flexible surface detector electronics, a large array of buried muon detectors, and an extended duty cycle for operations of the fluorescence...
Topics: Astrophysics, High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics
Source: http://arxiv.org/abs/1604.03637

Arxiv.org

43 43

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

Jun 28, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; J. C. Diaz; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; A. Dorofeev; Q. Dorosti Hasankiadeh; R. C. dos Anjos; M. T. Dova; J. Alvarez-Muñiz; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. Farrar; R. Alves Batista; A. C. Fauth; N. Fazzini; A....

eye 43

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Contributions of the Pierre Auger Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands
Topics: High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1509.03732

Arxiv.org

14 14

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

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; C. Di Giulio; A. Di Matteo; J. C. Diaz; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; A. Dorofeev; Q. Dorosti Hasankiadeh; J. Alvarez-Muñiz; R. C. dos Anjos; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; R. Alves Batista; K. Fang; G. Farrar;...

eye 14

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Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory to extend its range of detection and to directly measure the muon content of the particle showers. It consists of an infill of surface water-Cherenkov detectors accompanied by buried scintillator detectors used for muon counting. The main objectives of the AMIGA engineering array, referred to as the Unitary Cell, are to identify and resolve all engineering issues as well as to understand the muon-number...
Topics: High Energy Physics - Experiment, Physics, Instrumentation and Detectors
Source: http://arxiv.org/abs/1605.01625

Arxiv.org

10 10.0

Pierre Auger Observatory and Telescope Array: Joint Contributions to the 34th International Cosmic Ray Conference (ICRC 2015)

Jun 28, 2018 06/18

by Telescope Array Collaboration; R. U. Abbasi; M. Abe; T. Abu-Zayyad; M. Allen; R. Azuma; E. Barcikowski; J. W. Belz; D. R. Bergman; S. A. Blake; R. Cady; K. Tanaka; M. Tanaka; S. B. Thomas; G. B. Thomson; P. Tinyakov; I. Tkachev; H. Tokuno; T. Tomida; S. Troitsky; Y. Tsunesada; M. J. Chae; K. Tsutsumi; Y. Uchihori; S. Udo; F. Urban; G. Vasiloff; T. Wong; R. Yamane; H. Yamaoka; K. Yamazaki; J. Yang; B. G. Cheon; K. Yashiro; Y. Yoneda; S. Yoshida; H. Yoshii; R. Zollinger; Z. Zundel; Pierre Auger...

eye 10

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Joint contributions of the Pierre Auger Collaboration and the Telescope Array Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands.
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1511.02103

Arxiv.org

22 22

The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015)

Jun 28, 2018 06/18

by IceCube Collaboration; M. G. Aartsen; K. Abraham; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; M. Ahrens; D. Altmann; T. Anderson; I. Ansseau; G. Golup; J. G. Gonzalez; D. Góra; D. Grant; J. C. Groh; A. Groß; C. Ha; C. Haack; A. Haj Ismail; A. Hallgren; M. Archinger; F. Halzen; B. Hansmann; K. Hanson; D. Hebecker; D. Heereman; K. Helbing; R. Hellauer; D. Hellwig; S. Hickford; J. Hignight; C. Arguelles; G. C. Hill; K. D. Hoffman; R. Hoffmann; K. Holzapfel; A. Homeier; K. Hoshina; F....

eye 22

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We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cascades from the IceCube `high-energy starting events' sample and the other with 16 high-energy `track events'. The angular separation between the arrival directions of neutrinos and UHECRs is scanned over. The same events...
Topics: High Energy Physics - Experiment, Astrophysics, Instrumentation and Methods for Astrophysics, High...
Source: http://arxiv.org/abs/1511.02109

Arxiv.org

13 13

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

Jun 28, 2018 06/18

by The IceCube Collaboration; M. G. Aartsen; K. Abraham; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; M. Ahrens; D. Altmann; T. Anderson; I. Ansseau; Z. Griffith; A. Groß; C. Ha; C. Haack; A. Haj Ismail; A. Hallgren; F. Halzen; E. Hansen; B. Hansmann; K. Hanson; M. Archinger; D. Hebecker; D. Heereman; K. Helbing; R. Hellauer; S. Hickford; J. Hignight; G. C. Hill; K. D. Hoffman; R. Hoffmann; K. Holzapfel; C. Arguelles; A. Homeier; K. Hoshina; F. Huang; M. Huber; W. Huelsnitz; P. O. Hulth; K....

eye 13

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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...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1511.09408

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