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131.
Search for EeV protons of galactic origin
J. P. Lundquist, R.U. Abbasi, 2016, original scientific article

Abstract: Cosmic rays in the energy range 10^18.0–10^18.5 eV are thought to have a light, probably protonic, composition. To study their origin one can search for anisotropy in their arrival directions. Extragalactic cosmic rays should be isotropic, but galactic cosmic rays of this type should be seen mostly along the galactic plane, and there should be a shortage of events coming from directions near the galactic anticenter. This is due to the fact that, under the influence of the galactic magnetic field, the transition from ballistic to diffusive behavior is well advanced, and this qualitative picture persists over the whole energy range. Guided by models of the galactic magnetic field that indicate that the enhancement along the galactic plane should have a standard deviation of about 20° in galactic latitude, and the deficit in the galactic anticenter direction should have a standard deviation of about 50° in galactic longitude, we use the data of the Telescope Array surface detector in 10^18.0 to 10^18.5 eV energy range to search for these effects. The data are isotropic. Neither an enhancement along the galactic plane nor a deficit in the galactic anticenter direction is found. Using these data we place an upper limit on the fraction of EeV cosmic rays of galactic origin at 1.3% at 95% confidence level.
Found in: ključnih besedah
Summary of found: ...longitude, we use the data of the Telescope Array surface detector in 10^18.0 to 10^18.5...
Keywords: Cosmic ray, Galactic protons, Telescope array, Surface detector
Published: 30.04.2020; Views: 442; Downloads: 0
.pdf Fulltext (840,97 KB)

132.
Energy spectrum of ultra-high energy cosmic rays observed with the Telescope Array using a hybrid technique
J. P. Lundquist, T. Abu-Zayyad, 2015, original scientific article

Abstract: We measure the spectrum of cosmic rays with energies greater than eV with the fluorescence detectors (FDs) and the surface detectors (SDs) of the Telescope Array Experiment using the data taken in our first 2.3-year observation from May 27, 2008 to September 7, 2010. A hybrid air shower reconstruction technique is employed to improve accuracies in determination of arrival directions and primary energies of cosmic rays using both FD and SD data. The energy spectrum presented here is in agreement with our previously published spectra and the HiRes results.
Found in: ključnih besedah
Keywords: Ultra-high energy cosmic rays, Telescope Array, Hybrid spectrum
Published: 30.04.2020; Views: 505; Downloads: 0
.pdf Fulltext (267,06 KB)

133.
TeV dark matter search at the Galactic center with the CTA
Gabrijela Zaharijas, unpublished invited conference lecture

Found in: ključnih besedah
Summary of found: ...gamma rays, dark matter, Cherenkov Telescope Array...
Keywords: gamma rays, dark matter, Cherenkov Telescope Array
Published: 16.05.2020; Views: 364; Downloads: 0
.pdf Fulltext (107,91 KB)
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134.
The surface detector array of the Telescope Array experiment
J. P. Lundquist, T. Abu-Zayyad, 2012, original scientific article

Abstract: The Telescope Array (TA) experiment, located in the western desert of Utah, USA, is designed for the observation of extensive air showers from extremely high energy cosmic rays. The experiment has a surface detector array surrounded by three fluorescence detectors to enable simultaneous detection of shower particles at ground level and fluorescence photons along the shower track. The TA surface detectors and fluorescence detectors started full hybrid observation in March, 2008. In this article we describe the design and technical features of the TA surface detector.
Found in: ključnih besedah
Keywords: Ultra-high energy cosmic rays, Telescope Array experiment, Extensive air shower array
Published: 19.05.2020; Views: 361; Downloads: 0
.pdf Fulltext (1,81 MB)

135.
136.
Working Group Report on the Combined Analysis of Muon Density Measurements from Eight Air Shower Experiments
Lukas Zehrer, Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Marta Trini, Samo Stanič, J. P. Lundquist, Gašper Kukec Mezek, Andrej Filipčič, Lorenzo Cazon, 2019, published scientific conference contribution

Found in: ključnih besedah
Summary of found: ...observatory, KASCADE-Grande, NEVOD-DECOR, Pierre Auger Observatory, SUGAR, Telescope Array, Yakutsk EAS array...
Keywords: extensive air showers (EAS), muon density measurements in EAS, EAS-MSU array, IceCube neutrino observatory, KASCADE-Grande, NEVOD-DECOR, Pierre Auger Observatory, SUGAR, Telescope Array, Yakutsk EAS array
Published: 22.12.2020; Views: 73; Downloads: 3
.pdf Fulltext (620,78 KB)

137.
Search for Correlations of High-energy Neutrinos and Ultra-high Energy Cosmic Rays
Lukas Zehrer, Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Marta Trini, Samo Stanič, Jon Paul Lundquist, Gašper Kukec Mezek, Andrej Filipčič, A.M. Barbano, 2019, published scientific conference contribution

Found in: ključnih besedah
Summary of found: ...correlation search, IceCube neutrino observatory, Pierre Auger Observatory, Telescope Array, ANTARES neutrino observatory...
Keywords: ultra-high energy cosmic rays (UHECR), high-energy neutrinos, arrival directions, correlation search, IceCube neutrino observatory, Pierre Auger Observatory, Telescope Array, ANTARES neutrino observatory
Published: 22.12.2020; Views: 67; Downloads: 3
.pdf Fulltext (400,93 KB)

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