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38 38

Influence of cosmological models on the GZK horizon of ultrahigh energy protons

Sep 21, 2013 09/13

by M. De Domenico; A. Insolia

eye 38

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We investigate how the density of baryonic and cold dark matter, the density of dark energy and the value of the Hubble parameter at the present time influence the propagation of ultrahigh energy protons in the nearby Universe. We take into account energy losses in the cosmic microwave radiation, the only one relevant for protons above $10^{18}$ eV, and we explore the dependence of Greisen-Zatsepin-Kuz'min (GZK) horizon on the cosmology. We investigate several cosmological scenarios, from...
Source: http://arxiv.org/abs/1104.5083v5

Arxiv.org

46 46

Multiscale autocorrelation function: a new approach to anisotropy studies

Sep 22, 2013 09/13

by M. De Domenico; H. Lyberis; A. Insolia; M. Scuderi

eye 46

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We present a novel catalog-independent method, based on a scale dependent approach, to detect anisotropy signatures in the arrival direction distribution of the ultra highest energy cosmic rays (UHECR). The method provides a good discrimination power for both large and small data sets, even in presence of strong contaminating isotropic background. We present some applications to simulated data sets of events corresponding to plausible scenarios for charged particles detected by world-wide...
Source: http://arxiv.org/abs/1001.1666v4

Arxiv.org

40 40

A multiscale autocorrelation function for anisotropy studies

Sep 23, 2013 09/13

by M. Scuderi; M. De Domenico; A. Insolia; H. Lyberis

eye 40

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In recent years many procedures have been proposed to check the anisotropy of a dataset. We present a new simple procedure, based on a scale dependent approach, to detect anisotropy signatures in a given distribution with particular attention to small dataset. The method provides a good discrimination power for both large and small datasets, even in presence of strong contaminating isotropic background. We present some applications to simulated datasets of events to investigate statistical...
Source: http://arxiv.org/abs/1105.1604v1

Arxiv.org

82 82

Measurement of the Sky Photon Background Flux at the Auger Observatory

Sep 19, 2013 09/13

by R. Caruso; A. Insolia; S. Petrera; P. Privitera; F. Salamida; V. Verzi

eye 82

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The sky photon background flux has been measured at the southern Auger site in Malargue, Argentina, using the observatory's fluorescence detectors (FD). The analysis is based on ADC variances of pixels not triggered by the First Level Trigger. Photon fluxes are calculated for each individual pixel at each telescope. The statistics from each night of data taking allows a study of local variations in the photon flux. Results show a clear dependence of the flux on elevation angle. Time variations,...
Source: http://arxiv.org/abs/astro-ph/0507105v1

Arxiv.org

49 49

A new method for the UHECR mass composition studies

Sep 20, 2013 09/13

by M. Ambrosio; C. Aramo; D. D'Urso; A. D. Erlykin; F. Guarino; A. Insolia

eye 49

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The detemination of the primary cosmic ray mass composition from the longitudinal development of atmospheric cascades is still an open problem. In this work we propose a new method of the multiparametric topological analysis and show that if both X$_{max}$ - the depth of shower maximum and N$_{max}$ - the number of charged particles in the shower maximum are used, reliable results can be obtained.
Source: http://arxiv.org/abs/astro-ph/0410179v2

Arxiv.org

55 55

A new multiparametric topological method for determining the primary cosmic ray mass composition in the knee energy region

Sep 20, 2013 09/13

by M. Ambrosio; C. Aramo; D. D'Urso; A. D. Erlykin; F. Guarino; A. Insolia

eye 55

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The determination of the primary cosmic ray mass composition from the characteristics of extensive air showers (EAS), obtained at an observation level in the lower half of the atmosphere, is still an open problem. In this work we propose a new method of the Multiparametric Topological Analysis and show its applicability for the determination of the mass composition of the primary cosmic rays at the PeV energy region.
Source: http://arxiv.org/abs/astro-ph/0410184v1

Arxiv.org

53 53

Quality studies of the data taking conditions for the Auger Fluorescence Detector

Sep 19, 2013 09/13

by R. Caruso; R. Fonte; A. Insolia; S. Petrera; J. Rodriguez Martino; Pierre Auger Collaboration

eye 53

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As more than half of the Fluorescence Detector (FD) of the Auger Observatory is completed, data taking is becoming a routine job. It is then necessary to follow strict procedures to assure the quality of the data. An overview of the data taking methods is given. The nature of the FD background signal is due to the night sky brightness (stars and planet faint light, moonlight, twilight, airglow, zodiacal and artificial light) and to the electronic background (photomultiplier and electronic...
Source: http://arxiv.org/abs/astro-ph/0507132v1

Arxiv.org

63 63

Earth-skimming UHE Tau Neutrinos at the Fluorescence Detector of Pierre Auger Observatory

Sep 21, 2013 09/13

by C. Aramo; A. Insolia; A. Leonardi; G. Miele; L. Perrone; O. Pisanti; D. V. Semikoz

eye 63

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Ultra high energy neutrinos are produced by the interaction of hadronic cosmic rays with the cosmic radiation background. More exotic scenarios like topological defects or new hadrons predict even larger fluxes. In particular, Earth-skimming tau neutrinos could be detected by the Fluorescence Detector (FD) of Pierre Auger Observatory. A detailed evaluation of the expected number of events has been performed for a wide class of neutrino flux models. An updated computation of the neutrino-nucleon...
Source: http://arxiv.org/abs/astro-ph/0407638v2

Arxiv.org

46 46

Comparison between methods for the determination of the primary cosmic ray mass composition from the longitudinal profile of atmospheric cascades

Sep 19, 2013 09/13

by M. Ambrosio; C. Aramo; C. Donalek; D. D'Urso; A. D. Erlykin; F. Guarino; A. Insolia; G. Longo

eye 46

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The determination of the primary cosmic ray mass composition from the longitudinal development of atmospheric cascades is still a debated issue. In this work we discuss several data analysis methods and show that if the entire information contained in the longitudinal profile is exploited, reliable results may be obtained. Among the proposed methods FCC ('Fit of the Cascade Curve'), MTA ('Multiparametric Topological Analysis') and NNA ('Neural Net Analysis') with conjugate gradient optimization...
Source: http://arxiv.org/abs/astro-ph/0507543v2

Arxiv.org

45 45

Optical Relative Calibration and Stability Monitoring for the Auger Fluorescence Detector

Sep 19, 2013 09/13

by Pierre Auger Collaboration; C. Aramo; J. Brack; R. Caruso; D. D'Urso; D. Fazio; R. Fonte; H. Gemmeke; M. Kleifges; R. Knapik; A. Insolia; J. A. J. Matthews; A. Menshikov; W. Miller; P. Privitera; J. Rodriguez Martino

eye 45

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The stability of the fluorescence telescopes of the Pierre Auger Observatory is monitored with the optical relative calibration setup. Optical fibers distribute light pulses to three different diffuser groups within the optical system. The total charge per pulse is measured for each pixel and compared with reference calibration measurements. This allows monitoring the short and long term stability with respect of the relative timing between pixels and the relative gain for each pixel. The...
Source: http://arxiv.org/abs/astro-ph/0507577v2

Arxiv.org

50 50

The Absolute, Relative and Multi-Wavelength Calibration of the Pierre Auger Observatory Fluorescence Detectors

Sep 19, 2013 09/13

by R. Knapik; P. Bauleo; B. R. Becker; J. Brack; R. Caruso; C. Delle Fratte; A. Dorofeev; J. Harton; A. Insolia; J. A. J. Matthews; A. Menshikov; F. Ortolani; P. Petrinca; A. Pichel; S. Riggi; M. Roberts; J. Rodriguez Martino; A. C. Rovero; M. Scuderi; A. Tamashiro; D. Torresi; V. Tuci; L. Wiencke; for the Pierre Auger Collaboration

eye 50

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Absolute calibration of the Pierre Auger Observatory fluorescence detectors uses a 375 nm light source at the telescope aperture. This end-to-end technique accounts for the combined effects of all detector components in a single measurement. The relative response has been measured at wavelengths of 320, 337, 355, 380 and 405 nm, defining a spectral response curve which has been normalized to the absolute calibration. Before and after each night of data taking a relative calibration of the...
Source: http://arxiv.org/abs/0708.1924v1

Arxiv.org

52 52

Lambda Hyperons in 2 A*GeV Ni + Cu Collisions

Sep 22, 2013 09/13

by EOS Collaboration; M. Justice; S. Albergo; F. Bieser; F. P. Brady; Z. Caccia; D. A. Cebra; A. D. Chacon; J. L. Chance; Y. Choi; S. Costa; J. B. Elliott; M. L. Gilkes; J. A. Hauger; A. S. Hirsch; E. L. Hjort; A. Insolia; D. Keane; J. C. Kintner; M. A. Lisa; H. Liu; H. S. Matis; R. McGrath; M. McMahan; C. McParland; D. L. Olson; M. D. Partlan; N. T. Porile; R. Potenza; G. Rai; J. O. Rasmussen; H. G. Ritter; J. Romanski; J. L. Romero; G. V. Russo; R. P. Scharenberg; A. Scott; Y. Shao; B. K....

eye 52

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A sample of Lambda's produced in 2 A*GeV Ni + Cu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Lambda directed flow. The transverse mass spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of Lambda multiplicity on impact parameter is observed, from which a total Lambda + Sigma^0...
Source: http://arxiv.org/abs/nucl-ex/9708005v2

Arxiv.org

60 60

The Evolution of Nuclear Multifragmentation in the Temperature-Density Plane

Sep 20, 2013 09/13

by P. G. Warren; S. Albergo; J. M. Alexander; F. Bieser; F. P. Brady; Z. Caccia; D. A. Cebra; A. D. Chacon; J. L. Chance; Y. Choi; S. Costa; J. B. Elliott; M. L. Gilkes; J. A. Hauger; A. S. Hirsch; E. L. Hjort; A. Insolia; M. Justice; D. Keane; J. C. Kitner; R. Lacey; J. Lauret; V. Lindenstruth; M. A. Lisa; H. S. Matis; R. L. McGrath; M. McMahan; C. McParlan; W. F. J. Mueller; D. L. Olson; M. D. Partlan; N. T. Porile; R. Potenza; G. Rai; J. Rasmussen; H. G. Ritter; J. Romanski; J. L. Romero; G. V....

eye 60

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The mean transverse kinetic energies of the fragments formed in the interaction of 1 A GeV Au+C have been determined. An energy balance argument indicates the presence of a collective energy which increases in magnitude with increasing multiplicity and accounts for nearly half of the measured mean transverse kinetic energy. The radial flow velocity associated with the collective energy yields estimates for the time required to expand to the freeze-out volume. Isentropic trajectories in the...
Source: http://arxiv.org/abs/nucl-ex/9610008v1

Arxiv.org

169 169

The JEM-EUSO Mission: Status and Prospects in 2011

Sep 21, 2013 09/13

by The JEM-EUSO Collaboration; :; J. H. Adams Jr; S. Ahmad; J. -N. Albert; D. Allard; M. Ambrosio; L. Anchordoqui; A. Anzalone; Y. Arai; C. Aramo; K. Asano; P. Barrillon; T. Batsch; J. Bayer; T. Belenguer; R. Bellotti; A. A. Berlind; M. Bertaina; P. L. Biermann; S. Biktemerova; C. Blaksley; J. Blecki; S. Blin-Bondil; J. Bluemer; P. Bobik; M. Bogomilov; M. Bonamente; M. S. Briggs; S. Briz; A. Bruno; F. Cafagna; D. Campana; J-N. Capdevielle; R. Caruso; M. Casolino; C. Cassardo; G. Castellini; O....

eye 169

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Contributions of the JEM-EUSO Collaboration to the 32nd International Cosmic Ray Conference, Beijing, August, 2011.
Source: http://arxiv.org/abs/1204.5065v1

Arxiv.org

13 13

Calibration of the Logarithmic-Periodic Dipole Antenna (LPDA) Radio Stations at the Pierre Auger Observatory using an Octocopter

Jun 30, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; G. A. Anastasi; A. Dundovic; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; G. Farrar; L. Anchordoqui; A. C. Fauth; N. Fazzini; F. Fenu; B. Fick; J. M. Figueira; A. Filipčič; O. Fratu; M. M. Freire; T. Fujii; A. Fuster; B. Andrada; R. Gaior; B. García; D. Garcia-Pinto; F. Gaté; H....

eye 13

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An in-situ calibration of a logarithmic periodic dipole antenna with a frequency coverage of 30 MHz to 80 MHz is performed. Such antennas are part of a radio station system used for detection of cosmic ray induced air showers at the Engineering Radio Array of the Pierre Auger Observatory, the so-called Auger Engineering Radio Array (AERA). The directional and frequency characteristics of the broadband antenna are investigated using a remotely piloted aircraft (RPA) carrying a small transmitting...
Topics: High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1702.01392

Arxiv.org

11 11

A targeted search for point sources of EeV photons with the Pierre Auger Observatory

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; G. A. Anastasi; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; G. Farrar; A. C. Fauth; N. Fazzini; B. Fick; L. Anchordoqui; J. M. Figueira; A. Filipčič; O. Fratu; M. M. Freire; T. Fujii; A. Fuster; R. Gaior; B. García; D. Garcia-Pinto; F. Gaté; B. Andrada; H. Gemmeke; A. Gherghel-Lascu; P. L. Ghia;...

eye 11

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Simultaneous measurements of air showers with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for EeV photon point sources. Several Galactic and extragalactic candidate objects are grouped in classes to reduce the statistical penalty of many trials from that of a blind search and are analyzed for a significant excess above the background expectation. The presented search does not find any evidence for photon emission at candidate sources, and...
Topics: Astrophysics, High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology
Source: http://arxiv.org/abs/1612.04155

Arxiv.org

12 12

Ultrahigh-energy neutrino follow-up of Gravitational Wave events GW150914 and GW151226 with the Pierre Auger Observatory

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Dundovic; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. A. Anastasi; G. Farrar; A. C. Fauth; N. Fazzini; B. Fick; J. M. Figueira; A. Filipčič; O. Fratu; M. M. Freire; T. Fujii; A. Fuster; L. Anchordoqui; R. Gaior; B. García; D. Garcia-Pinto; F. Gaté;...

eye 12

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On September 14, 2015 the Advanced LIGO detectors observed their first gravitational-wave (GW) transient GW150914. This was followed by a second GW event observed on December 26, 2015. Both events were inferred to have arisen from the merger of black holes in binary systems. Such a system may emit neutrinos if there are magnetic fields and disk debris remaining from the formation of the two black holes. With the surface detector array of the Pierre Auger Observatory we can search for neutrinos...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1608.07378

Arxiv.org

11 11

$Search for photons with energies above 10$^{18}$ eV using the hybrid detector of the Pierre Auger Observatory$

Search for photons with energies above 10$^{18}$ eV using the hybrid detector of the Pierre Auger Observatory

Jun 29, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; G. A. Anastasi; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; H. Falcke; G. Farrar; A. C. Fauth; N. Fazzini; B. Fick; L. Anchordoqui; J. M. Figueira; A. Filipčič; O. Fratu; M. M. Freire; T. Fujii; A. Fuster; R. Gaior; B. García; D. Garcia-Pinto; F. Gaté; B. Andrada; H. Gemmeke; A. Gherghel-Lascu; P. L. Ghia;...

eye 11

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A search for ultra-high energy photons with energies above 1 EeV is performed using nine years of data collected by the Pierre Auger Observatory in hybrid operation mode. An unprecedented separation power between photon and hadron primaries is achieved by combining measurements of the longitudinal air-shower development with the particle content at ground measured by the fluorescence and surface detectors, respectively. Only three photon candidates at energies 1 - 2 EeV are found, which is...
Topics: Astrophysics, High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1612.01517

Arxiv.org

6 6.0

Search for ultrarelativistic magnetic monopoles with the Pierre Auger Observatory

Jun 29, 2018 06/18

eye 6

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We present a search for ultra-relativistic magnetic monopoles with the Pierre Auger Observatory. Such particles, possibly a relic of phase transitions in the early universe, would deposit a large amount of energy along their path through the atmosphere, comparable to that of ultrahigh-energy cosmic rays (UHECRs). The air shower profile of a magnetic monopole can be effectively distinguished by the fluorescence detector from that of standard UHECRs. No candidate was found in the data collected...
Topics: Astrophysics, High Energy Astrophysical Phenomena
Source: http://arxiv.org/abs/1609.04451

Arxiv.org

14 14

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

Jun 30, 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 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

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

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

18 18

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

Jun 29, 2018 06/18

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

10 10.0

A search for point sources of EeV photons

Jun 30, 2018 06/18

by Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; M. Ahlers; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; J. Allen; P. Allison; A. Di Matteo; J. C. Diaz; M. L. Díaz Castro; P. N. Diep; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; P. N. Dong; A. Dorofeev; A. Almela; Q. Dorosti Hasankiadeh; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; P. Facal San Luis; J. Alvarez Castillo; H. Falcke; K. Fang; G. Farrar; A. C....

eye 10

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Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85{\deg} to +20{\deg}, in an energy range from 10^17.3 eV to 10^18.5 eV. No photon point source has been detected. An upper limit on the...
Topics: High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1406.2912

Arxiv.org

86 86

$Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory$

Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory

Sep 23, 2013 09/13

by The Pierre Auger Collaboration; J. Abraham; P. Abreu; M. Aglietta; C. Aguirre; E. J. Ahn; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez-Muñiz; M. Ambrosio; L. Anchordoqui; S. Andringa; A. Anzalone; C. Aramo; S. Argiró; K. Arisaka; F. Arneodo; F. Arqueros; T. Asch; H. Asorey; P. Assis; J. Aublin; M. Ave; G. Avila; T. Bäcker; D. Badagnani; K. B. Barber; A. F. Barbosa; S. L. C. Barroso; B. Baughman; P. Bauleo; J. J. Beatty; T. Beau; B. R. Becker; K. H. Becker; A. Bellétoile; J. A....

eye 86

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From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV = 10^18 eV) respectively. These are the first experimental limits on ultra-high energy photons at energies below 10 EeV. The results complement previous constraints on top-down models from array data and they reduce...
Source: http://arxiv.org/abs/0903.1127v2

Arxiv.org

75 75

A search for ultra-high energy neutrinos in highly inclined events at the Pierre Auger Observatory

Sep 23, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; M. Ahlers; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Anticic; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; A. M. Badescu; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. Bäuml; J. J. Beatty; B....

eye 75

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The Surface Detector of the Pierre Auger Observatory is sensitive to neutrinos of all flavours above 0.1 EeV. These interact through charged and neutral currents in the atmosphere giving rise to extensive air showers. When interacting deeply in the atmosphere at nearly horizontal incidence, neutrinos can be distinguished from regular hadronic cosmic rays by the broad time structure of their shower signals in the water-Cherenkov detectors. In this paper we present for the first time an analysis...
Source: http://arxiv.org/abs/1202.1493v1

Arxiv.org

98 98

Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory

Sep 23, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; A. Anzalone; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. Bäuml; J. J. Beatty; B. R. Becker; K. H....

eye 98

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We present the results of an analysis of data recorded at the Pierre Auger Observatory in which we search for groups of directionally-aligned events (or `multiplets') which exhibit a correlation between arrival direction and the inverse of the energy. These signatures are expected from sets of events coming from the same source after having been deflected by intervening coherent magnetic fields. The observation of several events from the same source would open the possibility to accurately...
Source: http://arxiv.org/abs/1111.2472v1

Arxiv.org

87 87

Search for First Harmonic Modulation in the Right Ascension Distribution of Cosmic Rays Detected at the Pierre Auger Observatory

Sep 22, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. J. Beatty; B. R. Becker; K. H. Becker; J. A. Bellido; S....

eye 87

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We present the results of searches for dipolar-type anisotropies in different energy ranges above $2.5\times 10^{17}$ eV with the surface detector array of the Pierre Auger Observatory, reporting on both the phase and the amplitude measurements of the first harmonic modulation in the right-ascension distribution. Upper limits on the amplitudes are obtained, which provide the most stringent bounds at present, being below 2% at 99% $C.L.$ for EeV energies. We also compare our results to those of...
Source: http://arxiv.org/abs/1103.2721v1

Arxiv.org

88 88

Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

Sep 19, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; E. J. Ahn; D. Allard; I. Allekotte; J. Allen; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; A. Anzalone; C. Aramo; E. Arganda; K. Arisaka; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; D. Badagnani; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. J. Beatty; B. R. Becker; K. H. Becker; A. Bellétoile;...

eye 88

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Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuz'min energy threshold, \nobreak{$6\times 10^{19}$eV}. The anisotropy was measured by the fraction of arrival directions that are less than $3.1^\circ$ from the position of an active galactic nucleus within 75 Mpc (using the V\'eron-Cetty and V\'eron $12^{\rm th}$ catalog). An updated measurement of this fraction is reported...
Source: http://arxiv.org/abs/1009.1855v2

Arxiv.org

12 12

A Targeted Search for Point Sources of EeV Neutrons

Jun 30, 2018 06/18

by The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; M. Ahlers; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; J. Allen; P. Allison; A. Di Matteo; J. C. Diaz; M. L. Díaz Castro; P. N. Diep; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; P. N. Dong; A. Dorofeev; A. Almela; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; P. Facal San Luis; H. Falcke; J. Alvarez Castillo; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini; A....

eye 12

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A flux of neutrons from an astrophysical source in the Galaxy can be detected in the Pierre Auger Observatory as an excess of cosmic-ray air showers arriving from the direction of the source. To avoid the statistical penalty for making many trials, classes of objects are tested in combinations as nine "target sets", in addition to the search for a neutron flux from the Galactic Center or from the Galactic Plane. Within a target set, each candidate source is weighted in proportion to...
Topics: High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1406.4038

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

13 13

Reconstruction of inclined air showers detected with the Pierre Auger Observatory

Jun 30, 2018 06/18

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

eye 13

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We describe the method devised to reconstruct inclined cosmic-ray air showers with zenith angles greater than $60^\circ$ detected with the surface array of the Pierre Auger Observatory. The measured signals at the ground level are fitted to muon density distributions predicted with atmospheric cascade models to obtain the relative shower size as an overall normalization parameter. The method is evaluated using simulated showers to test its performance. The energy of the cosmic rays is...
Topics: High Energy Astrophysical Phenomena, Astrophysics, High Energy Physics - Experiment
Source: http://arxiv.org/abs/1407.3214

Arxiv.org

121 121

Trigger and Aperture of the Surface Detector Array of the Pierre Auger Observatory

Sep 23, 2013 09/13

by J. Abraham; P. Abreu; M. Aglietta; C. Aguirre; E. J. Ahn; D. Allard; I. Allekotte; J. Allen; J. Alvarez-Muñiz; M. Ambrosio; L. Anchordoqui; S. Andringa; A. Anzalone; C. Aramo; E. Arganda; S. Argirò; K. Arisaka; F. Arneodo; F. Arqueros; T. Asch; H. Asorey; P. Assis; J. Aublin; M. Ave; G. Avila; T. Bäcker; D. Badagnani; K. B. Barber; A. F. Barbosa; S. L. C. Barroso; B. Baughman; P. Bauleo; J. J. Beatty; T. Beau; B. R. Becker; K. H. Becker; A. Bellétoile; J. A. Bellido; S. BenZvi; C. Berat; P....

eye 121

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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...
Source: http://arxiv.org/abs/1111.6764v1

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

81 81

The Lateral Trigger Probability function for the Ultra-High Energy Cosmic Ray Showers detected by the Pierre Auger Observatory

Sep 23, 2013 09/13

eye 81

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In this paper we introduce the concept of Lateral Trigger Probability (LTP) function, i.e., the probability for an extensive air shower (EAS) to trigger an individual detector of a ground based array as a function of distance to the shower axis, taking into account energy, mass and direction of the primary cosmic ray. We apply this concept to the surface array of the Pierre Auger Observatory consisting of a 1.5 km spaced grid of about 1600 water Cherenkov stations. Using Monte Carlo simulations...
Source: http://arxiv.org/abs/1111.6645v1

Arxiv.org

121 121

The effect of the geomagnetic field on cosmic ray energy estimates and large scale anisotropy searches on data from the Pierre Auger Observatory

Sep 23, 2013 09/13

by P. Abreu; M. Aglietta; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; A. Anzalone; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. Bäuml; J. J. Beatty; B. R. Becker; K. H. Becker; A. Bellétoile; J. A....

eye 121

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We present a comprehensive study of the influence of the geomagnetic field on the energy estimation of extensive air showers with a zenith angle smaller than $60^\circ$, detected at the Pierre Auger Observatory. The geomagnetic field induces an azimuthal modulation of the estimated energy of cosmic rays up to the ~2% level at large zenith angles. We present a method to account for this modulation of the reconstructed energy. We analyse the effect of the modulation on large scale anisotropy...
Source: http://arxiv.org/abs/1111.7122v1

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

56 56

Description of Atmospheric Conditions at the Pierre Auger Observatory using the Global Data Assimilation System (GDAS)

Sep 18, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; M. Ahlers; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; A. M. Badescu; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. Bäuml; J. J. Beatty;...

eye 56

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Atmospheric conditions at the site of a cosmic ray observatory must be known for reconstructing observed extensive air showers. The Global Data Assimilation System (GDAS) is a global atmospheric model predicated on meteorological measurements and numerical weather predictions. GDAS provides altitude-dependent profiles of the main state variables of the atmosphere like temperature, pressure, and humidity. The original data and their application to the air shower reconstruction of the Pierre...
Source: http://arxiv.org/abs/1201.2276v2

Arxiv.org

48 48

Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory

Sep 21, 2013 09/13

eye 48

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The Pierre Auger Collaboration has reported evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies $E>E_{th}=5.5\times 10^{19}$ eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at $E>E_{th}$ are heavy nuclei with charge $Z$, the proton component of the sources should lead to excesses in the same...
Source: http://arxiv.org/abs/1106.3048v2

Arxiv.org

92 92

Advanced functionality for radio analysis in the Offline software framework of the Pierre Auger Observatory

Sep 22, 2013 09/13

by The Pierre Auger Collaboration; P. Abreu; M. Aglietta; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; J. Alvarez Castillo; J. Alvarez-Muñiz; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; T. Bäcker; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. J. Beatty; B. R. Becker; K. H. Becker; J. A. Bellido; S....

eye 92

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The advent of the Auger Engineering Radio Array (AERA) necessitates the development of a powerful framework for the analysis of radio measurements of cosmic ray air showers. As AERA performs "radio-hybrid" measurements of air shower radio emission in coincidence with the surface particle detectors and fluorescence telescopes of the Pierre Auger Observatory, the radio analysis functionality had to be incorporated in the existing hybrid analysis solutions for fluoresence and surface...
Source: http://arxiv.org/abs/1101.4473v2

Arxiv.org

104 104

Antennas for the Detection of Radio Emission Pulses from Cosmic-Ray induced Air Showers at the Pierre Auger Observatory

Sep 18, 2013 09/13

by P. Abreu; M. Aglietta; M. Ahlers; E. J. Ahn; I. F. M. Albuquerque; D. Allard; I. Allekotte; J. Allen; P. Allison; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; R. Alves Batista; M. Ambrosio; A. Aminaei; L. Anchordoqui; S. Andringa; T. Antičić; C. Aramo; E. Arganda; F. Arqueros; H. Asorey; P. Assis; J. Aublin; M. Ave; M. Avenier; G. Avila; A. M. Badescu; M. Balzer; K. B. Barber; A. F. Barbosa; R. Bardenet; S. L. C. Barroso; B. Baughman; J. Bäuml; C. Baus; J. J. Beatty; K. H. Becker; A....

eye 104

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The Pierre Auger Observatory is exploring the potential of the radio detection technique to study extensive air showers induced by ultra-high energy cosmic rays. The Auger Engineering Radio Array (AERA) addresses both technological and scientific aspects of the radio technique. A first phase of AERA has been operating since September 2010 with detector stations observing radio signals at frequencies between 30 and 80 MHz. In this paper we present comparative studies to identify and optimize the...
Source: http://arxiv.org/abs/1209.3840v1

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

10 10.0

$Searches for Large-Scale Anisotropy in the Arrival Directions of Cosmic Rays Detected above Energy of $10^{19}$ eV at the Pierre Auger Observatory and the Telescope Array$

Searches for Large-Scale Anisotropy in the Arrival Directions of Cosmic Rays Detected above Energy of $10^{19}$ eV at the Pierre Auger Observatory and the Telescope Array

Jun 30, 2018 06/18

by The Pierre Auger; Telescope Array Collaborations; :; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; J. Allen; 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; P. Allison; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Espadanal; A. Etchegoyen; P. Facal San Luis; H. Falcke; A. Almela; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini;...

eye 10

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Spherical harmonic moments are well-suited for capturing anisotropy at any scale in the flux of cosmic rays. An unambiguous measurement of the full set of spherical harmonic coefficients requires full-sky coverage. This can be achieved by combining data from observatories located in both the northern and southern hemispheres. To this end, a joint analysis using data recorded at the Telescope Array and the Pierre Auger Observatory above $10^{19}$ eV is presented in this work. The resulting...
Topics: Instrumentation and Methods for Astrophysics, High Energy Astrophysical Phenomena, Astrophysics
Source: http://arxiv.org/abs/1409.3128

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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