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21 results on '"S. R. Stratton"'

1. First upper limits on the radar cross section of cosmic-ray induced extensive air showers

Author

John Belz, Eiji Kido, Nobuyuki Sakurai, Fumiya Shibata, Kazuhiro Machida, R. Ishimori, Takahiro Fujii, Helio Takai, M. Abou Bakr Othman, Maxim Pshirkov, J. H. Kim, W. R. Cho, C. Jayanthmurthy, O. Kalashev, R. W. Springer, Peter Tinyakov, Samuel Blake, Shoichi Ogio, Charlie Jui, Mayuko Minamino, K. Honda, Yasunori Kitamura, Masaaki Tanaka, G. Vasiloff, J. P. Lundquist, Toru Nakamura, Jyunsei Chiba, Kenichi Kadota, Akitoshi Oshima, Dongsu Ryu, Ryuji Takeishi, M. J. Chae, S. Kitamura, Hidemi Ito, K. Nagasawa, Y. Uchihori, Hideaki Shimodaira, Hiroyuki Sagawa, Fumio Kakimoto, T. Matsuyama, D. Z. Besson, M. Allen, Y. J. Kwon, Michiyuki Chikawa, Priti Shah, T. Suzawa, Hideyuki Ohoka, Isaac Myers, K. Oki, Y. Yoneda, N. Inoue, S. I. Lim, M. Ohnishi, Tomohiro Matsuda, S. Prohira, Masato Takita, Suresh Venkatesh, K. Yamazaki, J. Ogura, Mai Takamura, Tareq Abu-Zayyad, R. Yamane, Ahmad RezazadehReyhani, Toshiyuki Nonaka, T. Goto, S. Udo, R. Azuma, Rasha Abbasi, Hiroshi Yamaoka, Pierre Sokolsky, Yuichiro Tameda, B. G. Cheon, John N. Matthews, L. M. Scott, Zach Zundel, Behrouz Farhang-Boroujeny, Takaaki Ishii, Bokkyun Shin, A. Nozato, Y. Hayashi, Sergey Troitsky, Hongsu Kim, A. L. Sampson, K. Kawata, D. C. Rodriguez, V. Kuzmin, S. Kawakami, Akimichi Taketa, K. Martens, H. Kawai, S. Yoshida, Hideki Tanaka, M. Takeda, Daisuke Ikeda, M. Byrne, S. B. Thomas, S. R. Stratton, Shigehiro Nagataki, Tiffany Wong, Masaki Fukushima, J. Lan, Douglas Bergman, Ross Anderson, Kiyoshi Tanaka, Kenta Yashiro, K. Tsutsumi, R. Zollinger, Naoaki Hayashida, M. Abe, S. Kunwar, Igor Tkachev, R. Cady, David Schurig, K. Hibino, H. Yoshii, Y. Tsunesada, Shunsuke Ozawa, Ben Stokes, Elliott Barcikowski, Dmitri Ivanov, Keijiro Mukai, Federico R. Urban, T.-A. Shibata, Gordon Thomson, Tom Stroman, Inkyu Park, K. Kasahara, Masaomi Ono, G. Rubtsov, Takayuki Tomida, W.H. Gillman, H. Tokuno, J. D. Smith, Shingo Kawana, William Hanlon, T. Okuda, J. Yang, and J. C. Hanson

Subjects
Physics, Radar cross-section, Physics::Instrumentation and Detectors, Pulse-Doppler radar, business.industry, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy and Astrophysics, 01 natural sciences, law.invention, Continuous-wave radar, Radar engineering details, Optics, Radar astronomy, law, Radar imaging, 0103 physical sciences, Radar, Radar display, Astrophysics - Instrumentation and Methods for Astrophysics, 010306 general physics, business, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Remote sensing
Abstract

TARA (Telescope Array Radar) is a cosmic ray radar detection experiment colocated with Telescope Array, the conventional surface scintillation detector (SD) and fluorescence telescope detector (FD) near Delta, Utah, U.S.A. The TARA detector combines a 40 kW, 54.1 MHz VHF transmitter and high-gain transmitting antenna which broadcasts the radar carrier over the SD array and within the FD field of view, towards a 250 MS/s DAQ receiver. TARA has been collecting data since 2013 with the primary goal of observing the radar signatures of extensive air showers (EAS). Simulations indicate that echoes are expected to be short in duration (~10 microseconds) and exhibit rapidly changing frequency, with rates on the order of 1 MHz/microsecond. The EAS radar cross-section (RCS) is currently unknown although it is the subject of over 70 years of speculation. A novel signal search technique is described in which the expected radar echo of a particular air shower is used as a matched filter template and compared to waveforms obtained by triggering the radar DAQ using the Telescope Array fluorescence detector. No evidence for the scattering of radio frequency radiation by EAS is obtained to date. We report the first quantitative RCS upper limits using EAS that triggered the Telescope Array Fluorescence Detector., Comment: 21 pages, 30 figures

Published
2017

2. Search for EeV protons of galactic origin

Author

R. Ishimori, R. Zollinger, Kenta Yashiro, Yasunori Saito, Yuichiro Tameda, John N. Matthews, K. Nagasawa, J. Yang, Y. J. Kwon, Eiji Kido, Hideyuki Ohoka, Kazuhiro Machida, J. Lan, S. Kitamura, Masato Takita, M. Abe, Byung Gu Cheon, Hidemi Ito, John Belz, Toshiyuki Nonaka, Elliott Barcikowski, Takayuki Tomida, Igor Tkachev, R. Cady, Motoki Hayashi, J. P. Lundquist, Ryuji Takeishi, BayarJon Paul Lubsandorzhiev, K. Hibino, Ben Stokes, Inkyu Park, T. Matsuyama, L. M. Scott, S. Ozawa, Dmitri Ivanov, Keijiro Mukai, Hiroshi Yamaoka, Tomohiro Matsuda, Mayuko Minamino, K. Honda, Y. Yoneda, N. Inoue, Federico R. Urban, A. Nozato, Y. Hayashi, K. Oki, M. Ohnishi, Yasunori Kitamura, T. Goto, S. Udo, C. C. H. Jui, K. Kawata, M. Allen, Douglas Bergman, Yoshiki Tsunesada, Nobuyuki Sakurai, Masaaki Tanaka, Sergey Troitsky, Daisuke Ikeda, Hideaki Shimodaira, Toru Nakamura, Kenichi Kadota, S. R. Stratton, H. Kawai, K. Kasahara, Akitoshi Oshima, S. B. Thomas, O. Kalashev, Shoichi Kishigami, Koichi Sekino, Kanako Yamazaki, Takahiro Fujii, Tiffany Wong, Priti Shah, K. Saito, Masaki Fukushima, Masaomi Ono, Jyunsei Chiba, Dongsu Ryu, B. K. Shin, Grigory Rubtsov, K. Martens, Hideki Tanaka, S. Yoshida, Y. Takahashi, Mai Takamura, Ryota Onogi, J. H. Kim, Vladim Kuzmin, H. Yoshii, Tareq Abu-Zayyad, A. H. Tirone, R. Yamane, Kiyoshi Tanaka, J. Ogura, Naoto Sakaki, Naoaki Hayashida, Peter Tinyakov, Samuel Blake, Maxim Pshirkov, Shoichi Ogio, T.-A. Shibata, Gordon Thomson, Tom Stroman, Zach Zundel, Pierre Sokolsky, Hang Bae Kim, Akimichi Taketa, Heungsu Shin, Rasha Abbasi, M. Takeda, Fumio Kakimoto, Shigehiro Nagataki, Michiyuki Chikawa, K. Tsutsumi, R. Azuma, S. Kawakami, Hiroyuki Sagawa, Y. Uchihori, T. Suzawa, Isaac Myers, Takaaki Ishii, D. C. Rodriguez, Shingo Kawana, William Hanlon, T. Okuda, H. Tokuno, J. D. Smith, and Fumiya Shibata

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Galactic anticenter, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Cosmic ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Galactic plane, 01 natural sciences, Galactic tide, law.invention, Telescope, law, 0103 physical sciences, Galactic corona, Astrophysics - High Energy Astrophysical Phenomena, Anisotropy, Longitude, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics
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$^\circ$ in galactic latitude, and the deficit in the galactic anticenter direction should have a standard deviation of about 50$^\circ$ 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.

Published
2017

3. Search for point sources of ultra-high energy photons with the Telescope Array surface detector

Author

Yasunori Saito, Yuichiro Tameda, John N. Matthews, G. Furlich, Takaaki Ishii, Takayuki Tomida, Heungsu Shin, D. C. Rodriguez, Fumio Kakimoto, Hideki Tanaka, Hideyuki Ohoka, Pierre Sokolsky, Elliott Barcikowski, M. Takeda, Shigehiro Nagataki, Yana Zhezher, K. Hibino, Dmitri Ivanov, Douglas Bergman, Hideaki Shimodaira, Hyoming Jeong, Keijiro Mukai, Younghoon Kwon, T. Suzawa, K. Martens, Eiji Kido, Kenta Yashiro, M. V. Kuznetsov, K. Tsutsumi, Kazuhiro Machida, K. Yamazaki, Isaac Myers, Sergey Troitsky, K. H. Lee, Grigory Rubtsov, T.-A. Shibata, Hidemi Ito, J. Remington, Gordon Thomson, BayarJon Paul Lubsandorzhiev, K. Kasahara, Tom Stroman, Shoichi Kishigami, Robert Cady, Mayuko Minamino, John Belz, Hiroyuki Sagawa, Kiyoshi Tanaka, Kuzmin, Maxim Pshirkov, K. Honda, J. H. Kim, Toshio Seki, Y. Uchihori, Kei Nakai, Masaaki Tanaka, Naoaki Hayashida, Akitoshi Oshima, Y. Tsunesada, Y. Omura, Fumiya Shibata, Masaomi Ono, Toshiyuki Nonaka, R. Sahara, M. Allen, Takashi Sako, R. Ishimori, Hongsu Kim, Toru Nakamura, Kohei Yada, Igor Tkachev, Kenichi Kadota, Inkyu Park, Shingo Kawana, Jyunsei Chiba, Dongsu Ryu, H. Oda, T. Fujii, Keitaro Fujita, Y. Takagi, Akimichi Taketa, Ben Stokes, Tareq Abu-Zayyad, N. Inoue, B. G. Cheon, H. Kawai, B. K. Shin, M. Ohnishi, Federico R. Urban, S. Udo, C. C. H. Jui, Oleg Kalashev, William Hanlon, S. B. Thomas, S. Kawakami, T. Okuda, Rasha Abbasi, Seok Ho Jeong, J. Yang, L. M. Scott, Y. Hayashi, M. Yamamoto, Priti Shah, K. Kawata, Zach Zundel, Nobuyuki Sakurai, Ryota Onogi, A. Di Matteo, Daisuke Ikeda, Ryota Fujiwara, R. Mayta, S. R. Stratton, Tiffany Wong, Naoto Sakaki, R. Takeishi, Ryo Nakamura, Kazuo Saito, Masaki Fukushima, H. Yoshii, R. Azuma, T. Matsuyama, S. Ozawa, Masato Takita, H. Yamaoka, Michiyuki Chikawa, H. Tokuno, J. D. Smith, Peter Tinyakov, Samuel Blake, Shoichi Ogio, Yuta Tanoue, Motoki Hayashi, J. P. Lundquist, Koichi Sekino, Y. Takahashi, Mai Takamura, and M. Abe

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Photon flux, Library science, FOS: Physical sciences, Astronomy and Astrophysics, 01 natural sciences, Joint research, High energy photon, Science research, Space and Planetary Science, 0103 physical sciences, Research policy, Science policy, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, 010303 astronomy & astrophysics, Vice president
Abstract

The surface detector (SD) of the Telescope Array (TA) experiment allows one to indirectly detect photons with energies of order $10^{18}$ eV and higher and to separate photons from the cosmic-ray background. In this paper we present the results of a blind search for point sources of ultra-high energy (UHE) photons in the Northern sky using the TA SD data. The photon-induced extensive air showers (EAS) are separated from the hadron-induced EAS background by means of a multivariate classifier based upon 16 parameters that characterize the air shower events. No significant evidence for the photon point sources is found. The upper limits are set on the flux of photons from each particular direction in the sky within the TA field of view, according to the experiment's angular resolution for photons. Average 95% C.L. upper limits for the point-source flux of photons with energies greater than $10^{18}$, $10^{18.5}$, $10^{19}$, $10^{19.5}$ and $10^{20}$ eV are $0.094$, $0.029$, $0.010$, $0.0073$ and $0.0058$ km$^{-2}$yr$^{-1}$ respectively. For the energies higher than $10^{18.5}$ eV, the photon point-source limits are set for the first time. Numerical results for each given direction in each energy range are provided as a supplement to this paper., Comment: accepted to MNRAS, 11 pages, 4 figures, 2 tables; results in text-file format are supplemented to paper source

Published
2019
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4. Testing a reported correlation between arrival directions of ultrahigh-energy cosmic rays and a flux pattern from nearby starburst galaxies using Telescope Array data

Author

H. Kawai, Grigory Rubtsov, T. Seki, Hideaki Shimodaira, Hyoming Jeong, Toshitsugu Fujii, Shingo Kawana, G. Furlich, Takaaki Ishii, Oleg Kalashev, William Hanlon, T. Goto, K. Martens, T. Okuda, J. Yang, D. C. Rodriguez, K. Tsutsumi, M. Abe, Y. Uchihori, Elliott Barcikowski, S. Kitamura, Dmitri Ivanov, Hidemi Ito, T. Suzawa, Keijiro Mukai, Hiroyuki Sagawa, Tareq Abu-Zayyad, Maxim Pshirkov, Kenta Yashiro, Yasunori Saito, Toru Nakamura, Isaac Myers, Kenichi Kadota, R. Yamane, R. Sahara, K. Nagasawa, Heungsu Shin, Yuichiro Tameda, John N. Matthews, Ben Stokes, Fumio Kakimoto, M. Allen, L. M. Scott, Y. Hayashi, K. Yamazaki, Vladim Kuzmin, Y. J. Kwon, M. Yamamoto, K. Hibino, K. Kawata, S. Jeong, B. G. Cheon, Hideyuki Ohoka, Charlie Jui, Ryo Nakamura, K. H. Lee, T.-A. Shibata, Gordon Thomson, Nobuyuki Sakurai, Sergey Troitsky, Tom Stroman, Akimichi Taketa, Robert Cady, Kazuo Saito, J. H. Kim, Igor Tkachev, BayarJon Paul Lubsandorzhiev, J. Remington, Mayuko Minamino, K. Honda, John Belz, Yasunori Kitamura, Y. Omura, S. Kawakami, H. Oda, D. R. Bergman, H. Yoshii, Masaaki Tanaka, A. Di Matteo, Inkyu Park, Fumiya Shibata, Ryota Onogi, R. Ishimori, Kiyoshi Tanaka, Naoaki Hayashida, Takayuki Tomida, Y. Yoneda, N. Inoue, M. Ohnishi, Federico R. Urban, Akitoshi Oshima, Y. Tsunesada, Pierre Sokolsky, S. Udo, Hongsu Kim, R. Mayta, M. Takeda, S. B. Thomas, J. Ogura, Shigehiro Nagataki, Yana Zhezher, Eiji Kido, M. V. Kuznetsov, Kazuhiro Machida, K. Kasahara, Shoichi Kishigami, Hideki Tanaka, Zach Zundel, Daisuke Ikeda, R. Azuma, S. R. Stratton, Tiffany Wong, R. Takeishi, Masaki Fukushima, H. Yamaoka, Michiyuki Chikawa, Masaomi Ono, Toshiyuki Nonaka, Keitaro Fujita, B. K. Shin, Priti Shah, Peter Tinyakov, Samuel Blake, Shoichi Ogio, Masato Takita, Motoki Hayashi, J. P. Lundquist, Koichi Sekino, Y. Takahashi, Mai Takamura, Jyunsei Chiba, Dongsu Ryu, Y. Takagi, T. Matsuyama, S. Ozawa, Rasha Abbasi, S. Yoshida, Naoto Sakaki, H. Tokuno, and J. D. Smith

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, FOS: Physical sciences, Sigma, Flux, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, Galaxy, Auger, law.invention, Telescope, Space and Planetary Science, law, 0103 physical sciences, Anisotropy, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Energy (signal processing)
Abstract

The Pierre Auger Collaboration (Auger) recently reported a correlation between the arrival directions of cosmic rays with energies above 39 EeV and the flux pattern of 23 nearby starburst galaxies (SBGs). In this Letter, we tested the same hypothesis using cosmic rays detected by the Telescope Array experiment (TA) in the 9-year period from May 2008 to May 2017. Unlike the Auger analysis, we did not optimize the parameter values but kept them fixed to the best-fit values found by Auger, namely 9.7% for the anisotropic fraction of cosmic rays assumed to originate from the SBGs in the list and 12.9{\deg} for the angular scale of the correlations. The energy threshold we adopted is 43 EeV, corresponding to 39 EeV in Auger when taking into account the energy-scale difference between two experiments. We find that the TA data is compatible with isotropy to within 1.1{\sigma} and with the Auger result to within 1.4{\sigma}, meaning that it is not capable to discriminate between these two hypotheses., Comment: More accurate title, fixed an inconsistency in the declination range used, with a few figures slightly changing as a result, other minor revisions

Published
2018

5. Depth of Ultra High Energy Cosmic Ray Induced Air Shower Maxima Measured by the Telescope Array Black Rock and Long Ridge FADC Fluorescence Detectors and Surface Array in Hybrid Mode

Author

R. Azuma, M. Yamamoto, Nobuyuki Sakurai, Ryota Onogi, A. Di Matteo, R. Mayta, B. G. Cheon, Fumiya Shibata, K. Martens, Hideki Tanaka, R. Ishimori, K. H. Lee, M. Abe, T.-A. Shibata, Gordon Thomson, Tom Stroman, Robert Cady, H. Tokuno, S. Kitamura, Priti Shah, T. Goto, K. Tsutsumi, Hideaki Shimodaira, Hyoming Jeong, Rasha Abbasi, S. Kawakami, Akimichi Taketa, Hidemi Ito, Jyunsei Chiba, Dongsu Ryu, J. D. Smith, J. Ogura, Toshiyuki Nonaka, Kiyoshi Tanaka, Akitoshi Oshima, Y. Takagi, G. Furlich, Takaaki Ishii, Shunsuke Ozawa, O. Kalashev, BayarJon Paul Lubsandorzhiev, Hiroshi Yamaoka, Mayuko Minamino, K. Honda, Y. Zhezher, Hiroyuki Sagawa, Keitaro Fujita, Yasunori Kitamura, Peter Tinyakov, Samuel Blake, D. C. Rodriguez, Shoichi Ogio, Ben Stokes, Toshitsugu Fujii, T. Matsuyama, Elliott Barcikowski, B. K. Shin, K. Yamazaki, Dmitri Ivanov, T. Suzawa, M. Allen, Masaaki Tanaka, K. Hibino, R. Sahara, Heungsu Shin, Zach Zundel, Ryo Nakamura, Keijiro Mukai, Isaac Myers, Kazuo Saito, Inkyu Park, Hongsu Kim, Pierre Sokolsky, S. Yoshida, Eiji Kido, Naoto Sakaki, Grigory Rubtsov, M. V. Kuznetsov, M. Takeda, John Belz, Vladim Kuzmin, H. Yoshii, Kazuhiro Machida, Shigehiro Nagataki, S. Jeong, Michiyuki Chikawa, H. Kawai, Tareq Abu-Zayyad, R. Yamane, K. Nagasawa, Douglas Bergman, Y. J. Kwon, Hideyuki Ohoka, Yasunori Saito, T. Seki, Yoshiki Tsunesada, Daisuke Ikeda, S. R. Stratton, Y. Uchihori, L. M. Scott, Tiffany Wong, R. Takeishi, Masaki Fukushima, Toru Nakamura, Y. Hayashi, Yuichiro Tameda, K. Kawata, John N. Matthews, Masato Takita, Kenichi Kadota, Sergey Troitsky, J. H. Kim, Y. Omura, Shingo Kawana, Naoaki Hayashida, William Hanlon, Igor Tkachev, T. Okuda, J. Yang, H. Oda, Kenta Yashiro, Y. Yoneda, N. Inoue, M. Ohnishi, Federico R. Urban, S. Udo, C. C. H. Jui, S. B. Thomas, Takayuki Tomida, K. Kasahara, Shoichi Kishigami, Masaomi Ono, Maxim Pshirkov, Motoki Hayashi, J. P. Lundquist, Koichi Sekino, Y. Takahashi, Mai Takamura, and Fumio Kakimoto

Subjects
Astrophysics::High Energy Astrophysical Phenomena, chemistry.chemical_element, FOS: Physical sciences, Cosmic ray, 7. Clean energy, 01 natural sciences, law.invention, Telescope, Optics, Observatory, law, 0103 physical sciences, Ultra-high-energy cosmic ray, 010303 astronomy & astrophysics, Helium, Astroparticle physics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, business.industry, Astronomy and Astrophysics, Air shower, chemistry, 13. Climate action, Space and Planetary Science, Ridge (meteorology), Astrophysics - High Energy Astrophysical Phenomena, business
Abstract

The Telescope Array observatory utilizes fluorescence detectors and surface detectors to observe air showers produced by ultra high energy cosmic rays in the Earth's atmosphere. Cosmic ray events observed in this way are termed hybrid data. The depth of air shower maximum is related to the mass of the primary particle that generates the shower. This paper reports on shower maxima data collected over 8.5 years using the Black Rock Mesa and Long Ridge fluorescence detectors in conjunction with the array of surface detectors. We compare the means and standard deviations of the observed $X_{\mathrm{max}}$ distributions with Monte Carlo $X_{\mathrm{max}}$ distributions of unmixed protons, helium, nitrogen, and iron, all generated using the QGSJet~II-04 hadronic model. We also perform an unbinned maximum likelihood test of the observed data, which is subjected to variable systematic shifting of the data $X_{\mathrm{max}}$ distributions to allow us to test the full distributions, and compare them to the Monte Carlo to see which elements are not compatible with the observed data. For all energy bins, QGSJet~II-04 protons are found to be compatible with Telescope Array hybrid data at the 95% confidence level after some systematic $X_{\mathrm{max}}$ shifting of the data. Three other QGSJet~II-04 elements are found to be compatible using the same test procedure in an energy range limited to the highest energies where data statistics are sparse., Comment: 39 pages, 18 figures, 5 tables, published in The Astrophysical Journal. This is a peer-reviewed, un-copyedited version of an article published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.3847/1538-4357/aabad7

Published
2018
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6. Evidence of Intermediate-Scale Energy Spectrum Anisotropy of Cosmic Rays E$\geq$10$^{19.2}$ eV with the Telescope Array Surface Detector

Author

N. Inoue, M. Ohnishi, R. Sahara, Toru Nakamura, S. Udo, Kenichi Kadota, Maxim Pshirkov, K. Kasahara, M. Abe, Shoichi Kishigami, T. Goto, Toshiyuki Nonaka, Zach Zundel, S. B. Thomas, Fumio Kakimoto, Masaomi Ono, Jyunsei Chiba, Charlie Jui, Dongsu Ryu, B. K. Shin, Hiroshi Yamaoka, Yoshiki Tsunesada, Daisuke Ikeda, Kenta Yashiro, Keitaro Fujita, BayarJon Paul Lubsandorzhiev, Ben Stokes, S. R. Stratton, Y. Takagi, Tiffany Wong, Mayuko Minamino, K. Honda, Masaki Fukushima, H. Tokuno, Yasunori Kitamura, K. Martens, Masato Takita, Hideki Tanaka, Takayuki Tomida, Masaaki Tanaka, J. D. Smith, Fumiya Shibata, Sergey Troitsky, S. Kitamura, R. Ishimori, Keiji Saito, Igor Tkachev, Michiyuki Chikawa, Eiji Kido, M. V. Kuznetsov, D. R. Bergman, H. Oda, Kazuhiro Machida, Hidemi Ito, Pierre Sokolsky, Y. Uchihori, Y. J. Kwon, Hideyuki Ohoka, R. Takeishi, Yasunori Saito, Shigehiro Nagataki, Akitoshi Oshima, T. Matsuyama, Yana Zhezher, T. Suzawa, Shunsuke Ozawa, Shingo Kawana, Yuichiro Tameda, John N. Matthews, Priti Shah, O. Kalashev, Vladim Kuzmin, William Hanlon, J. Ogura, F. Urban, S. Jeong, Isaac Myers, Motoki Hayashi, Peter Tinyakov, J. P. Lundquist, Samuel Blake, Shoichi Ogio, T. Okuda, J. Yang, M. Allen, Y. Omura, Naoaki Hayashida, Koichi Sekino, Elliott Barcikowski, K. Nagasawa, Dmitri Ivanov, Y. Takahashi, Mai Takamura, G. Furlich, Takaaki Ishii, Keijiro Mukai, D. C. Rodriguez, S. Yoshida, Naoto Sakaki, Rasha Abbasi, Kiyoshi Tanaka, John Belz, R. Azuma, Inkyu Park, L. M. Scott, A. Nozato, Y. Hayashi, K. Kawata, Hideaki Shimodaira, Hyoming Jeong, K. H. Lee, Tareq Abu-Zayyad, Hiroyuki Sagawa, T.-A. Shibata, R. Yamane, Gordon Thomson, Ryo Nakamura, Tom Stroman, Robert Cady, Hongsu Kim, Akimichi Taketa, Grigory Rubtsov, M. Yamamoto, H. Yoshii, Nobuyuki Sakurai, K. Yamazaki, Takahiro Fujii, Ryota Onogi, J. H. Kim, A. Di Matteo, B. G. Cheon, R. Mayta, K. Hibino, S. Kawakami, Heungsu Shin, K. Tsutsumi, H. Kawai, T. Seki, and Y. Yoneda

Subjects
Astroparticle physics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, Detector, Monte Carlo method, Isotropy, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Poisson distribution, 01 natural sciences, law.invention, Telescope, symbols.namesake, Space and Planetary Science, law, 0103 physical sciences, symbols, Anisotropy, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract

An intermediate-scale energy spectrum anisotropy has been found in the arrival directions of ultra-high energy cosmic rays of energies above $10^{19.2}$ eV in the northern hemisphere, using 7 years of data from the Telescope Array surface detector. A relative energy distribution test is done comparing events inside oversampled spherical caps of equal exposure, to those outside, using the Poisson likelihood ratio. The center of maximum significance is at $9^h$$16^m$, $45^{\circ}$. and has a deficit of events with energies $10^{19.2}$$\leq$$E$$

Published
2018
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7. Constraints on the diffuse photon flux with energies above $10^{18}$ eV using the surface detector of the Telescope Array experiment

Author

Rasha Abbasi, Fumiya Shibata, S. Yoshida, T. Matsuyama, S. Ozawa, Naoto Sakaki, Yasunori Saito, John Belz, K. Nagasawa, R. Ishimori, S. Kitamura, Hidemi Ito, Ryo Nakamura, Motoki Hayashi, Toshiyuki Nonaka, Hideki Tanaka, Kazuo Saito, J. P. Lundquist, M. Yamamoto, Ben Stokes, B. G. Cheon, Heungsu Shin, T. Suzawa, Yuichiro Tameda, Isaac Myers, Inkyu Park, John N. Matthews, Douglas Bergman, Nobuyuki Sakurai, Ryota Onogi, A. Di Matteo, Koichi Sekino, M. Allen, R. Mayta, Y. Zhezher, Grigory Rubtsov, Kenta Yashiro, K. Martens, K. Tsutsumi, Keitaro Fujita, Y. Takahashi, Mai Takamura, L. M. Scott, H. Yoshii, Daisuke Ikeda, Eiji Kido, M. V. Kuznetsov, S. Kawakami, Y. Uchihori, R. Azuma, Toshitsugu Fujii, Kazuhiro Machida, S. R. Stratton, Y. Hayashi, Sergey Troitsky, B. K. Shin, Oleg Kalashev, Hongsu Kim, Hiroyuki Sagawa, Tiffany Wong, R. Takeishi, Charlie Jui, J. Remington, Pierre Sokolsky, K. Kawata, Masaki Fukushima, Akimichi Taketa, G. Furlich, Takaaki Ishii, J. H. Kim, BayarJon Paul Lubsandorzhiev, M. Takeda, Shigehiro Nagataki, Mayuko Minamino, Hideaki Shimodaira, Hyoming Jeong, D. C. Rodriguez, H. Kawai, Y. Omura, Kiyoshi Tanaka, K. Kasahara, K. Honda, Akitoshi Oshima, Y. Tsunesada, Shoichi Kishigami, Yasunori Kitamura, Naoaki Hayashida, Masaaki Tanaka, T. Seki, Masato Takita, J. Ogura, H. Yamaoka, Masaomi Ono, R. Sahara, Michiyuki Chikawa, Y. Yoneda, N. Inoue, Jyunsei Chiba, K. Hibino, Shingo Kawana, Fumio Kakimoto, Dongsu Ryu, K. Yamazaki, Tareq Abu-Zayyad, R. Yamane, Maksim Piskunov, William Hanlon, M. Ohnishi, Takayuki Tomida, Y. Takagi, T. Okuda, J. Yang, Federico R. Urban, Toru Nakamura, S. Udo, K. H. Lee, Kenichi Kadota, T.-A. Shibata, H. Tokuno, Zach Zundel, J. D. Smith, Priti Shah, Gordon Thomson, S. B. Thomas, Tom Stroman, Robert Cady, Igor Tkachev, Maxim Pshirkov, Elliott Barcikowski, Dmitri Ivanov, H. Oda, Keijiro Mukai, Peter Tinyakov, Samuel Blake, Shoichi Ogio, Vladim Kuzmin, T. Goto, S. Jeong, M. Abe, Y. J. Kwon, and Hideyuki Ohoka

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Muon, Photon, 010308 nuclear & particles physics, Detector, FOS: Physical sciences, Astronomy and Astrophysics, Curvature, 01 natural sciences, Computational physics, law.invention, High Energy Physics - Experiment, Telescope, High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), Air shower, Distribution function, High Energy Physics - Phenomenology (hep-ph), law, 0103 physical sciences, Waveform, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics
Abstract

We present the results of the search for ultra-high-energy photons with nine years of data from the Telescope Array surface detector. A multivariate classifier is built upon 16 reconstructed parameters of the extensive air shower. These parameters are related to the curvature and the width of the shower front, the steepness of the lateral distribution function, and the timing parameters of the waveforms sensitive to the shower muon content. A total number of two photon candidates found in the search is fully compatible with the expected background. The $95\%\,$CL limits on the diffuse flux of the photons with energies greater than $10^{18.0}$, $10^{18.5}$, $10^{19.0}$, $10^{19.5}$ and $10^{20.0}$ eV are set at the level of $0.067$, $0.012$, $0.0036$, $0.0013$, $0.0013~\mbox{km}^{-2}\mbox{yr}^{-1}\mbox{sr}^{-1}$ correspondingly., Comment: 7 pages, 2 figures

Published
2018
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8. A NORTHERN SKY SURVEY FOR POINT-LIKE SOURCES OF EeV NEUTRAL PARTICLES WITH THE TELESCOPE ARRAY EXPERIMENT

Author

R. Ishimori, R. W. Springer, John Belz, Gordon Thomson, Federico R. Urban, K. Hibino, W. R. Cho, Nobuyuki Sakurai, Tomohiro Matsuda, Pierre Sokolsky, Sergey Troitsky, Masayuki Tanaka, ByongGu Cheon, Yuichiro Tameda, John N. Matthews, Younghoon Kwon, M. J. Chae, K. Martens, Y. Yoneda, S. I. Lim, Thomas Stroman, M. Ohnishi, S. Kawana, Kenichi Kadota, M. Abe, Il Hung Park, Douglas Bergman, H. Yoshii, S. Kitamura, Tomoyuki Nakamura, Fumio Kakimoto, H. Kawai, S. Udo, C. C. H. Jui, Mayuko Minamino, S. Nagataki, S. Kawakami, A. L. Sampson, K. Oki, Yasunori Kitamura, A. Oshima, Takaaki Ishii, S. B. Thomas, Elliott Barcikowski, Hirotaka Ito, Maxim Pshirkov, Masaomi Ono, K. Nagasawa, Dmitri Ivanov, Tatsunobu Shibata, Toshio Matsuyama, H. Shimodaira, HangBae Kim, Kenta Yashiro, Kenichi Tanaka, T. Suzawa, H. Tanaka, Isaac Myers, T. Goto, M. Takamura, Hiroyuki Sagawa, Shunsuke Ozawa, Naoya Inoue, K. Tsutsumi, J. Ogura, Priti Shah, B. T. Stokes, Igor Tkachev, Jon Paul Lundquist, Grigory Rubtsov, Akimichi Taketa, Oleg Kalashev, Takayuki Tomida, Masahiro Takeda, Naoaki Hayashida, L. M. Scott, H. Yamaoka, Ken Honda, A. Nozato, Y. Hayashi, V.A. Kuzmin, Zach Zundel, K. Machida, K. Yamazaki, Tareq Abu-Zayyad, R. Yamane, K. Mukai, H. Ohoka, J. Yang, J. Lan, R. Zollinger, B. K. Shin, Yoshiki Tsunesada, Daisuke Ikeda, S. R. Stratton, S. Yoshida, Katsuaki Kasahara, Tiffany Wong, R. Takeishi, Masaki Fukushima, Mark Allen, Masato Takita, Michiyuki Chikawa, Yukio Uchihori, Takahiro Fujii, Peter Tinyakov, Samuel Blake, Shoichi Ogio, J. H. Kim, Kazumasa Kawata, R. Azuma, J. D. Smith, D. Rodriguez, H. Tokuno, Eiji Kido, Toshiyuki Nonaka, Ruth A. Anderson, William Hanlon, Rasha Abbasi, Robert Cady, T. Okuda, G. Vasiloff, Jyunsei Chiba, Dongsu Ryu, and Fumiya Shibata

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), media_common.quotation_subject, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Scintillator, Coincidence, law.invention, Telescope, Space and Planetary Science, Neutron flux, Sky, law, Astrophysics - High Energy Astrophysical Phenomena, Order of magnitude, Astrophysics::Galaxy Astrophysics, Fermi Gamma-ray Space Telescope, media_common
Abstract

We report on the search for steady point-like sources of neutral particles around 10$^{18}$ eV between 2008 May and 2013 May with the scintillator surface detector of the Telescope Array experiment. We found overall no significant point-like excess above 0.5 EeV in the northern sky. Subsequently, we also searched for coincidence with the Fermi bright Galactic sources. No significant coincidence was found within the statistical uncertainty. Hence, we set an upper limit on the neutron flux that corresponds to an averaged flux of 0.07 km$^{-2}$ yr$^{-1}$ for $E>1$ EeV in the northern sky at the 95% confidence level. This is the most stringent flux upper limit in a northern sky survey assuming point-like sources. The upper limit at the 95% confidence level on the neutron flux from Cygnus X-3 is also set to 0.2 km$^{-2}$ yr$^{-1}$ for $E>0.5$ EeV. This is an order of magnitude lower than previous flux measurements., 27 pages, 10 figures, 3 tables, accepted for publication in the Astrophysical Journal

Published
2015

9. Energy spectrum of ultra-high energy cosmic rays observed with the Telescope Array using a hybrid technique

Author

S. Y. Roh, S. Yoshida, T. Kanbe, John Belz, Y. Murano, Thomas Stroman, Akitoshi Oshima, R. Zollinger, S. Kitamura, K. Nagasawa, Takayuki Tomida, Michiyuki Chikawa, Isaac Myers, H. Tokuno, K. Kitamoto, R. W. Springer, Igor Tkachev, R. Cady, Elliott Barcikowski, R. Aida, Eiji Kido, Toshiyuki Nonaka, Dmitri Ivanov, H. Fujii, H. Tanaka, Byung Gu Cheon, Yukio Uchihori, J. H. Kim, Pierre Sokolsky, Naoya Inoue, T. Fujii, Mayuko Minamino, Tatsunobu Shibata, Tomohiro Matsuda, Ross Anderson, Peter Tinyakov, Yasunori Kitamura, Samuel Blake, Shoichi Ogio, Toshio Matsuyama, K. Kobayashi, X. Zhou, Y. Yoneda, K. Tsutsumi, S. I. Lim, Zach Zundel, Sergey Troitsky, S. Machida, K. Martens, Hirotaka Ito, Younghoon Kwon, Shunsuke Ozawa, Mark Allen, S. Udo, C. C. H. Jui, Hiroyuki Sagawa, S. Kawana, H. Kawai, E. J. Cho, H. Shimodaira, M. Tanaka, S. Iwamoto, Y. Kondo, K. Oki, Tomoyuki Nakamura, S. Kawakami, Masaomi Ono, S. B. Thomas, S. Nagataki, Naoaki Hayashida, K. Miyata, R. Azuma, T. Matsuura, Fumiya Shibata, Y. Tsuyuguchi, Jon Paul Lundquist, Yoji Kobayashi, Kiyoshi Kuramoto, T. Shirahama, Takaaki Ishii, Gordon Thomson, B. T. Stokes, Yoshiki Tsunesada, K. Hibino, R. Ishimori, Daisuke Ikeda, S. R. Stratton, H. Yamaoka, Grigory Rubtsov, K. Hayashi, Hang Bae Kim, Katsuaki Kasahara, Akimichi Taketa, Tiffany Wong, T. Fukuda, Kenichi Tanaka, Masaki Fukushima, A. L. Sampson, S. Suzuki, Hyun-Il Kim, Douglas Bergman, Federico R. Urban, Masato Takita, Nobuyuki Sakurai, D. Oku, K. Hiyama, H. Yoshii, William Hanlon, Yukio Takahashi, G. Vasiloff, K. Ikuta, J. I. Shin, T. Okuda, Jyunsei Chiba, Maxim Pshirkov, Dongsu Ryu, Fumio Kakimoto, Y. Yamakawa, S. W. Nam, H. Ukai, Priti Shah, T. Iguchi, J. D. Smith, D. Rodriguez, Masahiro Takeda, Ken Honda, Yuichiro Tameda, John N. Matthews, M. Ohnishi, L. M. Scott, Y. Hayashi, V.A. Kuzmin, B. K. Shin, K. Yamazaki, Tareq Abu-Zayyad, R. Yamane, H. Ohoka, J. Yang, J. Lan, W. R. Cho, Kenichi Kadota, Il Hung Park, Y. Wada, and Oleg Kalashev

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 7. Clean energy, Spectral line, Computational physics, law.invention, Telescope, Air shower, law, Energy spectrum, Ultra-high-energy cosmic ray
Abstract

We measure the spectrum of cosmic rays with energies greater than 10 18.2 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.

Published
2015

10. The energy spectrum of ultra-high-energy cosmic rays measured by the Telescope Array FADC fluorescence detectors in monocular mode

Author

T. Kanbe, Y. Kobayashi, Fumiya Shibata, S. Kitamura, Robert M. Anderson, R. Ishimori, Hidemi Ito, Sergey Troitsky, Grigory Rubtsov, Isaac Myers, T. Matsuyama, Y. Yamakawa, S. Yoshida, H. Ukai, Priti Shah, Yuichiro Tameda, S. Suzuki, Taka Tomida, T. Shirahama, John N. Matthews, Douglas Bergman, Pierre Sokolsky, R. Zollinger, D. Oku, K. Hiyama, Y. J. Kwon, Hiroyuki Sagawa, K. Ikuta, Hideyuki Ohoka, Hideaki Shimodaira, M. Takeda, J. H. Kim, M. Allen, T. J. Sonley, Shigehiro Nagataki, K. Oki, Charlie Jui, J. Ogura, Y. Kondo, Akimichi Taketa, Naoaki Hayashida, Y. Tsuyuguchi, K. Kasahara, K. Kitamoto, J. P. Lundquist, Takaaki Ishii, Toshiyuki Nonaka, Mayuko Minamino, K. Honda, S. Y. Roh, B. G. Cheon, Takeshi Okuda, Igor Tkachev, T. Iguchi, A. L. Sampson, D. C. Rodriguez, S. Iwamoto, John Belz, Inkyu Park, K. Miyata, Masaomi Ono, J. I. Shin, Yasunori Kitamura, K. Yamazaki, Bokkyun Shin, S. Kawakami, Y. Murano, Tareq Abu-Zayyad, Vladim Kuzmin, R. Yamane, T. Fujii, K. Tsutsumi, Hiroshi Yamaoka, R. Aida, Masaaki Tanaka, G. Vasiloff, R. Azuma, T. Matsuura, Elliott Barcikowski, T.-A. Shibata, L. M. Scott, K. Hibino, Jyunsei Chiba, Dongsu Ryu, Gordon Thomson, Tom Stroman, Robert Cady, Y. Hayashi, Hongsu Kim, Dmitri Ivanov, H. Fujii, Y. Uchihori, O. Kalashev, W. R. Cho, H. Kawai, Hyun-Il Kim, Kiyoshi Tanaka, H. Yoshii, Eiji Kido, Yoshiki Tsunesada, K. Kuramoto, Y. Yoneda, N. Inoue, S. I. Lim, Daisuke Ikeda, Toru Nakamura, Kenichi Kadota, S. R. Stratton, M. Ohnishi, S. Machida, S. Udo, J. Yang, Y. Wada, Tiffany Wong, J. Lan, S. B. Thomas, Nobuyuki Sakurai, S. W. Nam, T. Fukuda, Masaki Fukushima, Peter Tinyakov, Samuel Blake, Shoichi Ogio, E. J. Cho, Michiyuki Chikawa, Yasuhiro H. Takahashi, Zach Zundel, Masato Takita, K. Martens, Hideki Tanaka, H. Tokuno, J. D. Smith, R. W. Springer, Tomohiro Matsuda, K. Kobayashi, Shingo Kawana, William Hanlon, Maxim Pshirkov, K. Hayashi, Fumio Kakimoto, Akitoshi Oshima, Shunsuke Ozawa, and Ben Stokes

Subjects
Astroparticle physics, Physics, business.industry, Aperture, Monte Carlo method, Detector, Astronomy and Astrophysics, Cosmic ray, law.invention, Telescope, Optics, law, Ultra-high-energy cosmic ray, business, Event reconstruction
Abstract

We present a measurement of the energy spectrum of ultra-high-energy cosmic rays performed by the Telescope Array experiment using monocular observations from its two new FADC-based fluorescence detectors. After a short description of the experiment, we describe the data analysis and event reconstruction procedures. Since the aperture of the experiment must be calculated by Monte Carlo simulation, we describe this calculation and the comparisons of simulated and real data used to verify the validity of the aperture calculation. Finally, we present the energy spectrum calculated from the merged monocular data sets of the two FADC-based detectors, and also the combination of this merged spectrum with an independent, previously published monocular spectrum measurement performed by Telescope Array’s third fluorescence detector [T. Abu-Zayyad et al., The energy spectrum of Telescope Array’s middle drum detector and the direct comparison to the high resolution fly’s eye experiment, Astroparticle Physics 39 (2012) 109-119, http://dx.doi.org/10.1016/j.astropartphys.2012.05.012 , Available from: ]. This combined spectrum corroborates the recently published Telescope Array surface detector spectrum [T. Abu-Zayyad, et al., The cosmic-ray energy spectrum observed with the surface detector of the Telescope Array experiment, ApJ 768 (2013) L1, http://dx.doi.org/10.1088/2041-8205/768/1/L1 , Available from: ] with independent systematic uncertainties.

Published
2013

11. Search for anisotropy of ultrahigh energy cosmic rays with the telescope array experiment

Author

T. Abu-Zayyad, R. Aida, M. Allen, R. Anderson, R. Azuma, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, R. Cady, B. G. Cheon, J. Chiba, M. Chikawa, E. J. Cho, W. R. Cho, H. Fujii, T. Fujii, T. Fukuda, M. Fukushima, W. Hanlon, K. Hayashi, Y. Hayashi, N. Hayashida, K. Hibino, K. Hiyama, K. Honda, T. Iguchi, D. Ikeda, K. Ikuta, N. Inoue, T. Ishii, R. Ishimori, D. Ivanov, S. Iwamoto, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, T. Kanbe, K. Kasahara, H. Kawai, S. Kawakami, S. Kawana, E. Kido, H. B. Kim, H. K. Kim, J. H. Kim, K. Kitamoto, S. Kitamura, Y. Kitamura, K. Kobayashi, Y. Kobayashi, Y. Kondo, K. Kuramoto, V. Kuzmin, Y. J. Kwon, S. I. Lim, S. Machida, K. Martens, J. Martineau, T. Matsuda, T. Matsuura, T. Matsuyama, J. N. Matthews, M. Minamino, K. Miyata, Y. Murano, I. Myers, K. Nagasawa, S. Nagataki, T. Nakamura, S. W. Nam, T. Nonaka, S. Ogio, M. Ohnishi, H. Ohoka, K. Oki, D. Oku, T. Okuda, A. Oshima, S. Ozawa, I. H. Park, M. S. Pshirkov, D. C. Rodriguez, S. Y. Roh, G. Rubtsov, D. Ryu, H. Sagawa, N. Sakurai, A. L. Sampson, L. M. Scott, P. D. Shah, F. Shibata, T. Shibata, H. Shimodaira, B. K. Shin, J. I. Shin, T. Shirahama, J. D. Smith, P. Sokolsky, T. J. Sonley, R. W. Springer, B. T. Stokes, S. R. Stratton, T. Stroman, S. Suzuki, Y. Takahashi, M. Takeda, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, Y. Tsunesada, K. Tsutsumi, Y. Tsuyuguchi, Y. Uchihori, S. Udo, H. Ukai, G. Vasiloff, Y. Wada, T. Wong, M. Wood, Y. Yamakawa, R. Yamane, H. Yamaoka, K. Yamazaki, J. Yang, Y. Yoneda, S. Yoshida, H. Yoshii, X. Zhou, R. Zollinger, and Z. Zundel

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Active galactic nucleus, Astrophysics::High Energy Astrophysical Phenomena, Isotropy, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, law.invention, Telescope, 13. Climate action, Space and Planetary Science, law, 0103 physical sciences, Ultra-high-energy cosmic ray, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Right ascension, Anisotropy, 010303 astronomy & astrophysics, Event (particle physics)
Abstract

We study the anisotropy of Ultra-High Energy Cosmic Ray (UHECR) events collected by the Telescope Array (TA) detector in the first 40 months of operation. Following earlier studies, we examine event sets with energy thresholds of 10 EeV, 40 EeV, and 57 EeV. We find that the distributions of the events in right ascension and declination are compatible with an isotropic distribution in all three sets. We then compare with previously reported clustering of the UHECR events at small angular scales. No significant clustering is found in the TA data. We then check the events with E>57 EeV for correlations with nearby active galactic nuclei. No significant correlation is found. Finally, we examine all three sets for correlations with the large-scale structure of the Universe. We find that the two higher-energy sets are compatible with both an isotropic distribution and the hypothesis that UHECR sources follow the matter distribution of the Universe (the LSS hypothesis), while the event set with E>10 EeV is compatible with isotropy and is not compatible with the LSS hypothesis at 95% CL unless large deflection angles are also assumed. We show that accounting for UHECR deflections in a realistic model of the Galactic magnetic field can make this set compatible with the LSS hypothesis., 10 pages, 9 figures

Published
2012

12. The Energy Spectrum of Cosmic Rays above 10$^{17.2}$ eV Measured by the Fluorescence Detectors of the Telescope Array Experiment in Seven Years

Author

K. Hibino, T. Goto, Grigory Rubtsov, H. Yoshii, Akitoshi Oshima, Ben Stokes, Kazumasa Kawata, R. Azuma, H. Kawai, K. Nagasawa, Kenta Yashiro, M. Abe, T.-A. Shibata, Gordon Thomson, Tom Stroman, Robert Cady, K. Martens, Federico R. Urban, Mayuko Minamino, T. Suzawa, John Belz, K. Honda, S. Kitamura, Hang Bae Kim, Priti Shah, Hideki Tanaka, Yasunori Kitamura, Mai Takamura, Hidemi Ito, Isaac Myers, K. Tsutsumi, Byung Gu Cheon, Masaaki Tanaka, Nobuyuki Sakurai, Bokkyun Shin, Eiji Kido, Fumiya Shibata, Igor Tkachev, Pierre Sokolsky, J. H. Kim, Kazuhiro Machida, Y. Tsunesada, Zach Zundel, S. Kawakami, Douglas Bergman, Fumio Kakimoto, R. Ishimori, K. Kasahara, Kanako Yamazaki, K. Oki, Toshiyuki Nonaka, J. P. Lundquist, M. Takeda, Sergey Troitsky, Inkyu Park, R. W. Springer, Shigehiro Nagataki, G. Vasiloff, Heungsu Shin, Y. Mukai, Y. J. Kwon, Hideyuki Ohoka, Hiroyuki Sagawa, Jyunsei Chiba, Y. Yoneda, Akimichi Taketa, Kiyoshi Tanaka, Dongsu Ryu, Hiroshi Yamaoka, N. Inoue, M. Ohnishi, Masaomi Ono, Ryuji Takeishi, S. Udo, C. C. H. Jui, Tomohiro Matsuda, S. B. Thomas, Toshihiro Fujii, Naoaki Hayashida, M. Allen, Shingo Kawana, O. Kalashev, W. R. Cho, Y. Uchihori, William Hanlon, Toru Nakamura, T. Okuda, J. Ogura, Kenichi Kadota, Takayuki Tomida, Elliott Barcikowski, Dmitri Ivanov, H. Tokuno, Takaaki Ishii, J. D. Smith, D. C. Rodriguez, J. Yang, Yuichiro Tameda, John N. Matthews, J. Lan, Masato Takita, Peter Tinyakov, Samuel Blake, Shoichi Ogio, L. M. Scott, A. Nozato, Y. Hayashi, Hideaki Shimodaira, Vladim Kuzmin, T. Matsuyama, S. Ozawa, Tareq Abu-Zayyad, R. Yamane, Maxim Pshirkov, Michiyuki Chikawa, S. Yoshida, Daisuke Ikeda, S. R. Stratton, Rasha Abbasi, Tiffany Wong, Masaki Fukushima, and R. Zollinger

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Range (particle radiation), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Detector, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 7. Clean energy, 01 natural sciences, Fluorescence, law.invention, Telescope, Orders of magnitude (time), law, 0103 physical sciences, Energy spectrum, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Energy (signal processing)
Abstract

The Telescope Array (TA) experiment is the largest detector to observe ultra-high-energy cosmic rays in the northern hemisphere. The fluorescence detectors at southern two stations of TA are newly constructed and have now completed seven years of steady operation. One advantage of monocular analysis of the fluorescence detectors is a lower energy threshold for cosmic rays than that of other techniques like stereoscopic observations or coincidences with the surface detector array, allowing the measurement of an energy spectrum covering three orders of magnitude in energy. Analyzing data collected during those seven years, we report the energy spectrum of cosmic rays covering a broad range of energies above 10$^{17.2}$ eV measured by the fluorescence detectors and a comparison with previously published results., Submitted to Astroparticle Physics

Published
2015

13. Search for correlations between HiRes stereo events and active galactic nuclei

Author

R. C. Gray, B. T. Stokes, C. Song, B. C. Knapp, J. R. Thomas, John N. Matthews, J. H. Boyer, Segev BenZvi, L. M. Scott, A. O’Neill, R. Riehle, C. Cannon, O. A. Brusova, Pierre Sokolsky, Dale Tupa, G. Archbold, P. Hüntemeyer, Konstantin Belov, W. Deng, Douglas Bergman, N. Sasaki, C. B. Finley, M. M. Maestas, M. A. Kirn, S. A. Blake, Gordon Thomson, M. D. Roberts, R. W. Springer, E. J. Mannel, C. C. H. Jui, Steve Schnetzer, E. C. Loh, G. Sinnis, Gareth Hughes, S. B. Thomas, C. M. Hoffman, Michael H. Holzscheiter, Tareq Abu-Zayyad, B. F. Jones, M. Seman, Y. Fedorova, J. D. Smith, Kevin Reil, N. Manago, J. F. Amman, J. Findlay, D. Rodriguez, Z. Cao, Lawrence Wiencke, Dmitri Ivanov, R. Snow, John Belz, S. A. Moore, L. Perera, Xiang Zhang, L. J. Marek, K. Kim, M. Allen, William Hanlon, Rasha Abbasi, C. A. Painter, K. Martens, A. Zech, G. W. Burt, and S. R. Stratton

Subjects
Physics, Active galactic nucleus, 010308 nuclear & particles physics, Astrophysics (astro-ph), Northern Hemisphere, FOS: Physical sciences, Astronomy, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Positive correlation, 01 natural sciences, Auger, Data set, Correlation, 0103 physical sciences, 010303 astronomy & astrophysics, Southern Hemisphere
Abstract

We have searched for correlations between the pointing directions of ultrahigh energy cosmic rays observed by the High Resolution Fly's Eye experiment and Active Galactic Nuclei (AGN) visible from its northern hemisphere location. No correlations, other than random correlations, have been found. We report our results using search parameters prescribed by the Pierre Auger collaboration. Using these parameters, the Auger collaboration concludes that a positive correlation exists for sources visible to their southern hemisphere location. We also describe results using two methods for determining the chance probability of correlations: one in which a hypothesis is formed from scanning one half of the data and tested on the second half, and another which involves a scan over the entire data set. The most significant correlation found occurred with a chance probability of 24%., 13 pages, 1 table, 5 figures

Published
2008

14. Study of Ultra-High Energy Cosmic Ray Composition Using Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode

Author

J. D. Smith, Michiyuki Chikawa, Hideaki Shimodaira, Y. J. Kwon, Hideyuki Ohoka, Mayuko Minamino, Inkyu Park, K. Honda, Yasunori Kitamura, Igor Tkachev, Douglas Bergman, Kazumasa Kawata, R. Azuma, Masaaki Tanaka, S. Kitamura, Hidemi Ito, Rasha Abbasi, K. Yamazaki, Tareq Abu-Zayyad, R. Yamane, Hiroyuki Sagawa, Vladim Kuzmin, K. Martens, K. Oki, T. Goto, M. J. Chae, Y. Yoneda, N. Inoue, S. I. Lim, M. Ohnishi, Nobuyuki Sakurai, Takahiro Fujii, J. H. Kim, T.-A. Shibata, Gordon Thomson, S. Udo, C. C. H. Jui, Tom Stroman, Robert Cady, Elliott Barcikowski, Grigory Rubtsov, F. Kakimoto, L. M. Scott, S. B. Thomas, Kenta Yashiro, Dmitri Ivanov, A. Nozato, Y. Hayashi, Sergey Troitsky, H. Yoshii, Masato Takita, Akimichi Taketa, Bokkyun Shin, Mai Takamura, Fumiya Shibata, R. W. Springer, M. Abe, Takayuki Tomida, B. G. Cheon, R. Ishimori, R. Zollinger, A. L. Sampson, S. Yoshida, Tomohiro Matsuda, S. Kawakami, Zach Zundel, J. P. Lundquist, J. Yang, Hideki Tanaka, G. Vasiloff, Yoshiki Tsunesada, T. Matsuyama, Daisuke Ikeda, Hongsu Kim, J. Lan, Jyunsei Chiba, Dongsu Ryu, S. R. Stratton, K. Hibino, Tiffany Wong, Masaki Fukushima, Federico R. Urban, Takaaki Ishii, Peter Tinyakov, Samuel Blake, Shoichi Ogio, Maxim Pshirkov, K. Kasahara, Priti Shah, D. C. Rodriguez, Akitoshi Oshima, Masaomi Ono, Shunsuke Ozawa, Naoaki Hayashida, Toshiyuki Nonaka, T. Suzawa, Robert M. Anderson, Oleg Kalashev, W. R. Cho, K. Nagasawa, Y. Mukai, Hiroshi Yamaoka, Toru Nakamura, Isaac Myers, Kiyoshi Tanaka, Kenichi Kadota, Shingo Kawana, William Hanlon, T. Okuda, Y. Uchihori, H. Tokuno, Heungsu Shin, Ryuji Takeishi, M. Allen, Yuichiro Tameda, John N. Matthews, H. Kawai, John Belz, Eiji Kido, Kazuhiro Machida, K. Tsutsumi, Pierre Sokolsky, M. Takeda, Shigehiro Nagataki, J. Ogura, and B. T. Stokes

Subjects
Physics, Pierre Auger Observatory, High Energy Astrophysical Phenomena (astro-ph.HE), Resolution (electron density), Detector, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Auger, law.invention, Computational physics, Telescope, Observatory, law, Ultra-high-energy cosmic ray, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Previous measurements of the composition of Ultra-High Energy Cosmic Rays(UHECRs) made by the High Resolution Fly's Eye(HiRes) and Pierre Auger Observatory(PAO) are seemingly contradictory, but utilize different detection methods, as HiRes was a stereo detector and PAO is a hybrid detector. The five year Telescope Array(TA) Middle Drum hybrid composition measurement is similar in some, but not all, respects in methodology to PAO, and good agreement is evident between data and a light, largely protonic, composition when comparing the measurements to predictions obtained with the QGSJetII-03 and QGSJet-01c models. These models are also in agreement with previous HiRes stereo measurements, confirming the equivalence of the stereo and hybrid methods. The data is incompatible with a pure iron composition, for all models examined, over the available range of energies. The elongation rate and mean values of Xmax are in good agreement with Pierre Auger Observatory data. This analysis is presented using two methods: data cuts using simple geometrical variables and a new pattern recognition technique., Comment: 23 pages, 30 figures

Published
2014
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15. Search for correlations of the arrival directions of ultra-high energy cosmic ray with extragalactic objects as observed by the telescope array experiment

Author

T. Abu-Zayyad, R. Aida, M. Allen, R. Anderson, R. Azuma, E. Barcikowski, J. W. Belz, D. R. Bergman, S. A. Blake, R. Cady, B. G. Cheon, J. Chiba, M. Chikawa, E. J. Cho, W. R. Cho, H. Fujii, T. Fujii, T. Fukuda, M. Fukushima, W. Hanlon, K. Hayashi, Y. Hayashi, N. Hayashida, K. Hibino, K. Hiyama, K. Honda, T. Iguchi, D. Ikeda, K. Ikuta, N. Inoue, T. Ishii, R. Ishimori, H. Ito, D. Ivanov, S. Iwamoto, C. C. H. Jui, K. Kadota, F. Kakimoto, O. Kalashev, T. Kanbe, K. Kasahara, H. Kawai, S. Kawakami, S. Kawana, K. Kawata, E. Kido, H. B. Kim, H. K. Kim, J. H. Kim, K. Kitamoto, S. Kitamura, Y. Kitamura, K. Kobayashi, Y. Kobayashi, Y. Kondo, K. Kuramoto, V. Kuzmin, Y. J. Kwon, J. Lan, S. I. Lim, J. P. Lundquist, S. Machida, K. Martens, T. Matsuda, T. Matsuura, T. Matsuyama, J. N. Matthews, M. Minamino, K. Miyata, Y. Murano, I. Myers, K. Nagasawa, S. Nagataki, T. Nakamura, S. W. Nam, T. Nonaka, S. Ogio, M. Ohnishi, H. Ohoka, K. Oki, D. Oku, T. Okuda, M. Ono, A. Oshima, S. Ozawa, I. H. Park, M. S. Pshirkov, D. C. Rodriguez, S. Y. Roh, G. Rubtsov, D. Ryu, H. Sagawa, N. Sakurai, A. L. Sampson, L. M. Scott, P. D. Shah, F. Shibata, T. Shibata, H. Shimodaira, B. K. Shin, J. I. Shin, T. Shirahama, J. D. Smith, P. Sokolsky, R. W. Springer, B. T. Stokes, S. R. Stratton, T. Stroman, S. Suzuki, Y. Takahashi, M. Takeda, A. Taketa, M. Takita, Y. Tameda, H. Tanaka, K. Tanaka, M. Tanaka, S. B. Thomas, G. B. Thomson, P. Tinyakov, I. Tkachev, H. Tokuno, T. Tomida, S. Troitsky, Y. Tsunesada, K. Tsutsumi, Y. Tsuyuguchi, Y. Uchihori, S. Udo, H. Ukai, F. Urban, G. Vasiloff, Y. Wada, T. Wong, Y. Yamakawa, R. Yamane, H. Yamaoka, K. Yamazaki, J. Yang, Y. Yoneda, S. Yoshida, H. Yoshii, X. Zhou, R. Zollinger, and Z. Zundel

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Active galactic nucleus, 010308 nuclear & particles physics, Angular distance, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Redshift, law.invention, Telescope, Space and Planetary Science, law, 0103 physical sciences, Ultra-high-energy cosmic ray, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Event (particle physics), Energy (signal processing)
Abstract

We search for correlations between positions of extragalactic objects and arrival directions of Ultra-High Energy Cosmic Rays (UHECRs) with primary energy $E \ge 40$ EeV as observed by the surface detector array of the Telescope Array (TA) experiment during the first 40 months of operation. We examined several public astronomical object catalogs, including the Veron-Cetty and Veron catalog of active galactic nuclei. We counted the number of TA events correlated with objects in each catalog as a function of three parameters: the maximum angular separation between a TA event and an object, the minimum energy of the events, and the maximum redshift of the objects. We determine combinations of these parameters which maximize the correlations, and calculate the chance probabilities of having the same levels of correlations from an isotropic distribution of UHECR arrival directions. No statistically significant correlations are found when penalties for scanning over the above parameters and for searching in several catalogs are taken into account.

Published
2013

16. The Energy Spectrum of Telescope Array's Middle Drum Detector and the Direct Comparison to the High Resolution Fly's Eye Experiment

Author

Fumiya Shibata, R. Ishimori, Y. J. Kwon, Hideyuki Ohoka, Y. Wada, O. Kalashev, R. W. Springer, Sergey Troitsky, Y. Uchihori, S. Suzuki, Jihee Kim, Tomohiro Matsuda, Hideaki Shimodaira, N. Sakurai, T.-A. Shibata, Douglas Bergman, Gordon Thomson, K. Miyata, Y. Yoneda, W. R. Cho, Tom Stroman, R. Zollinger, Robert Cady, Toru Nakamura, Kenichi Kadota, D. Oku, K. Hiyama, Pierre Sokolsky, N. Inoue, S. I. Lim, Kiyoshi Kuramoto, K. Kobayashi, Y. Kobayashi, K. Kitamoto, Bokkyun Shin, John Belz, Naoaki Hayashida, Y. Tsuyuguchi, M. Takeda, Shigehiro Nagataki, S. Kitamura, Y. Murano, Hiroyuki Sagawa, Ben Stokes, Mayuko Minamino, K. Honda, M. Ohnishi, T. Matsuyama, K. Yamazaki, Tareq Abu-Zayyad, R. Yamane, K. Martens, Takaaki Ishii, T. Shirahama, H. Kawai, S. Y. Roh, Yasunori Kitamura, Masaaki Tanaka, C. C. H. Jui, Hideki Tanaka, D. C. Rodriguez, K. Oki, Yuichiro Tameda, John N. Matthews, Inkyu Park, HangBae Kim, T. Kanbe, T. Fujii, K. Tsutsumi, Dmitry Gorbunov, L. M. Scott, K. Hibino, S. B. Thomas, Robert M. Anderson, S. Yoshida, Y. Hayashi, Isaac Myers, Maxim Pshirkov, Shingo Kawana, Akimichi Taketa, William Hanlon, Akitoshi Oshima, B. G. Cheon, J. Martineau, S. Machida, Shunsuke Ozawa, Y. Kondo, Vladim Kuzmin, Eiji Kido, S. Udo, K. Ikuta, R. Aida, A. L. Sampson, Kiyoshi Tanaka, H. Yoshii, Grigory Rubtsov, K. Hayashi, Yoshiki Tsunesada, S. Kawakami, H. Tokuno, Fumio Kakimoto, J. D. Smith, Daisuke Ikeda, M. Allen, Elliott Barcikowski, Dmitri Ivanov, S. R. Stratton, H. Fujii, Tiffany Wong, Yukio Takahashi, T. Fukuda, Masaki Fukushima, J. I. Shin, E. J. Cho, Michiyuki Chikawa, J. Yang, Zach Zundel, Toshiyuki Nonaka, Hiroshi Yamaoka, G. Vasiloff, Jyunsei Chiba, Dongsu Ryu, T. J. Sonley, S. W. Nam, H. Ukai, Priti Shah, S. Iwamoto, H. K. Kim, Masato Takita, R. Azuma, T. Matsuura, Samuel Blake, Shoichi Ogio, K. Kasahara, Takeshi Okuda, Igor Tkachev, Takayuki Tomida, T. Iguchi, M. Wood, P. Tinyakov, and Y. Yamakawa

Subjects
Physics, Monocular, business.industry, Detector, FOS: Physical sciences, Astronomy and Astrophysics, Drum, Scintillator, law.invention, Telescope, Optics, law, Scintillation counter, Calibration, business, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Energy (signal processing)
Abstract

The Telescope Array's Middle Drum fluorescence detector was instrumented with telescopes refurbished from the High Resolution Fly's Eye's HiRes-1 site. The data observed by Middle Drum in monocular mode was analyzed via the HiRes-1 profile-constrained geometry reconstruction technique and utilized the same calibration techniques enabling a direct comparison of the energy spectra and energy scales between the two experiments. The spectrum measured using the Middle Drum telescopes is based on a three-year exposure collected between December 16, 2007 and December 16, 2010. The calculated difference between the spectrum of the Middle Drum observations and the published spectrum obtained by the data collected by the HiRes-1 site allows the HiRes-1 energy scale to be transferred to Middle Drum. The HiRes energy scale is applied to the entire Telescope Array by making a comparison between Middle Drum monocular events and hybrid events that triggered both Middle Drum and the Telescope Array's scintillator Ground Array., Comment: 27 pages, 21 figures

Published
2012
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17. Analysis of large-scale anisotropy of ultra-high energy cosmic rays in HiRes data

Author

B. F. Jones, James F. Amann, Dale Tupa, P. Tinyakov, Kevin Reil, Konstantin Belov, R. Riehle, C. Cannon, J. Findlay, John Belz, William Hanlon, K. Kim, O. A. Brusova, P. Hüntemeyer, Hylke B. J. Koers, R. W. Springer, K. Martens, Lawrence Wiencke, M. Sasaki, M. M. Maestas, Steve Schnetzer, Gordon Thomson, Michael H. Holzscheiter, Dmitri Ivanov, L. J. Marek, G. W. Burt, Rasha Abbasi, J. D. Smith, Gareth Hughes, Tareq Abu-Zayyad, C. B. Finley, A. Zech, Douglas Bergman, Ben Stokes, L. M. Scott, R. C. Gray, N. Manago, Pierre Sokolsky, Xiang Zhang, D. C. Rodriguez, C. Song, Gus Sinnis, L. Perera, M. Allen, G. Archbold, S. R. Stratton, A. O’Neill, J. R. Thomas, M. D. Roberts, C. M. Hoffman, Y. Fedorova, W. Deng, John N. Matthews, C. A. Painter, Z. Cao, S. A. Moore, C. C. H. Jui, S. B. Thomas, M. A. Kirn, John Matthews, Samuel Blake, and E. C. Loh

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Astrophysics::High Energy Astrophysical Phenomena, media_common.quotation_subject, Isotropy, FOS: Physical sciences, Flux, Astronomy and Astrophysics, Cosmic ray, Astrophysics, 01 natural sciences, Universe, Space and Planetary Science, TRACER, 0103 physical sciences, ddc:520, Ultra-high-energy cosmic ray, Astrophysics - High Energy Astrophysical Phenomena, 010306 general physics, Anisotropy, 010303 astronomy & astrophysics, media_common, Free parameter
Abstract

Stereo data collected by the HiRes experiment over a six year period are examined for large-scale anisotropy related to the inhomogeneous distribution of matter in the nearby Universe. We consider the generic case of small cosmic-ray deflections and a large number of sources tracing the matter distribution. In this matter tracer model the expected cosmic ray flux depends essentially on a single free parameter, the typical deflection angle theta. We find that the HiRes data with threshold energies of 40 EeV and 57 EeV are incompatible with the matter tracer model at a 95% confidence level unless theta is larger than 10 degrees and are compatible with an isotropic flux. The data set above 10 EeV is compatible with both the matter tracer model and an isotropic flux., 9 pages, 5 Postscript figures

Published
2010

18. Measurement of the Flux of Ultra High Energy Cosmic Rays by the Stereo Technique

Author

B. F. Jones, M. A. Kirn, C. Cannon, O. A. Brusova, Gordon Thomson, P. Hüntemeyer, James F. Amann, W. Deng, B. K. Zhang, C. B. Finley, Michael H. Holzscheiter, R. Riehle, S. A. Blake, Steve Schnetzer, K. Martens, A. Zech, G. Sinnis, John Matthews, R. C. Gray, C. M. Hoffman, Y. Fedorova, J. D. Smith, R. W. Springer, D. Rodriguez, R. Snow, S. R. Stratton, Gareth Hughes, John N. Matthews, Tareq Abu-Zayyad, Dmitri Ivanov, K. Kim, G. Archbold, Z. Cao, Kevin Reil, S. A. Moore, Dale Tupa, L. M. Scott, E. C. Loh, L. Perera, Konstantin Belov, C. C. H. Jui, M. M. Maestas, S. B. Thomas, B. T. Stokes, J. R. Thomas, M. Al-Seady, Y. Zhang, Pierre Sokolsky, A. O’Neill, G. W. Burt, Lawrence Wiencke, M. Sasaki, J. Findlay, John Belz, M. D. Roberts, L. J. Marek, Douglas Bergman, C. A. Painter, William Hanlon, Rasha Abbasi, N. Manago, Xiang Zhang, and M. Allen

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Flux, High resolution, Stereoscopy, Cosmic ray, 01 natural sciences, law.invention, Optics, law, 0103 physical sciences, Ultra-high-energy cosmic ray, Ultrahigh energy, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Monocular, 010308 nuclear & particles physics, business.industry, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy and Astrophysics, business, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The High Resolution Fly's Eye experiment has measured the flux of ultrahigh energy cosmic rays using the stereoscopic air fluorescence technique. The HiRes experiment consists of two detectors that observe cosmic ray showers via the fluorescence light they emit. HiRes data can be analyzed in monocular mode, where each detector is treated separately, or in stereoscopic mode where they are considered together. Using the monocular mode the HiRes collaboration measured the cosmic ray spectrum and made the first observation of the Greisen-Zatsepin-Kuzmin cutoff. In this paper we present the cosmic ray spectrum measured by the stereoscopic technique. Good agreement is found with the monocular spectrum in all details., 20 pages, 10 figures

Published
2009

19. An upper limit on the electron-neutrino flux from the HiRes detector

Author

S. Y. Ben Zvi, M. Allen, B. F. Jones, J. Findlay, John Belz, R. C. Gray, Konstantin Belov, N. Manago, R. Riehle, J. D. Smith, Dmitri Ivanov, L. Perera, Ben Stokes, R. W. Springer, L. J. Marek, E. C. Loh, Douglas Bergman, L. M. Scott, G. Archbold, C. A. Painter, Xiang Zhang, P. Huentemeyer, J. R. Thomas, M. D. Roberts, J. H. Boyer, E. J. Mannel, C. Cannon, S. R. Stratton, Kevin Reil, O. A. Brusova, Z. Cao, C. M. Hoffman, A. O’Neill, Samuel Blake, G. W. Burt, C. B. Finley, S. A. Moore, K. Martens, Gareth Hughes, Pierre Sokolsky, Y. Fedorova, D. C. Rodriguez, John Matthews, Tareq Abu-Zayyad, Steve Schnetzer, William Hanlon, Rasha Abbasi, G. Sinnis, M. A. Kirn, C. Song, A. Zech, B. C. Knapp, M. M. Maestas, M. Seman, W. Deng, Lawrence Wiencke, James F. Amann, M. Sasaki, C. C. H. Jui, S. B. Thomas, John N. Matthews, Dale Tupa, R. Snow, K. Kim, A. Biesiadecka, Gordon Thomson, and Michael H. Holzscheiter

Subjects
Physics, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Detector, Astrophysics (astro-ph), Bremsstrahlung, Flux, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, 01 natural sciences, 7. Clean energy, Charged particle, Nuclear physics, Pair production, 13. Climate action, Space and Planetary Science, 0103 physical sciences, High Energy Physics::Experiment, Neutrino, 010306 general physics, Electron neutrino
Abstract

Air-fluorescence detectors such as the High Resolution Fly's Eye (HiRes) detector are very sensitive to upward-going, Earth-skimming ultrahigh energy electron-neutrino-induced showers. This is due to the relatively large interaction cross sections of these high-energy neutrinos and to the Landau-Pomeranchuk-Migdal (LPM) effect. The LPM effect causes a significant decrease in the cross sections for bremsstrahlung and pair production, allowing charged-current electron-neutrino-induced showers occurring deep in the Earth's crust to be detectable as they exit the Earth into the atmosphere. A search for upward-going neutrino-induced showers in the HiRes-II monocular dataset has yielded a null result. From an LPM calculation of the energy spectrum of charged particles as a function of primary energy and depth for electron-induced showers in rock, we calculate the shape of the resulting profile of these showers in air. We describe a full detector Monte Carlo simulation to determine the detector response to upward-going electron-neutrino-induced cascades and present an upper limit on the flux of electron-neutrinos., Comment: 13 pages, 3 figures. submitted to Astrophysical Journal

Published
2008
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20. THE COSMIC-RAY ENERGY SPECTRUM OBSERVED WITH THE SURFACE DETECTOR OF THE TELESCOPE ARRAY EXPERIMENT

Author

Elliott Barcikowski, John Belz, Dmitri Ivanov, H. Fujii, Thomas Stroman, Y. Murano, K. Kitamoto, K. Yamazaki, A. L. Sampson, Tareq Abu-Zayyad, R. Yamane, Zach Zundel, Mayuko Minamino, E. J. Cho, Younghoon Kwon, Yasunori Kitamura, Takayuki Tomida, K. Ikuta, Y. Yoneda, Akitoshi Oshima, S. Kawana, T. Shirahama, S. I. Lim, Michiyuki Chikawa, Inkyu Park, Nobuyuki Sakurai, ByongGu Cheon, L. M. Scott, Tomoyuki Nakamura, S. Kitamura, Y. Hayashi, T. Fujii, V.A. Kuzmin, William Hanlon, Fumiya Shibata, Fumio Kakimoto, H. Kawai, Yoshiki Tsunesada, S. Kawakami, T. Okuda, Hiroyuki Sagawa, K. Nagasawa, H. Shimodaira, S. W. Nam, S. Y. Roh, S. Yoshida, Naoya Inoue, Ross Anderson, H. Tanaka, H. Yoshii, H. Ukai, Daisuke Ikeda, S. R. Stratton, Yukio Uchihori, Katsuaki Kasahara, Tiffany Wong, R. Ishimori, Toshio Matsuyama, K. Oki, Priti Shah, Yukio Takahashi, K. Tsutsumi, T. Fukuda, Masaki Fukushima, J. H. Kim, Yuichiro Tameda, John N. Matthews, Maxim Pshirkov, M. Tanaka, Y. Kondo, K. Hibino, S. Udo, C. C. H. Jui, T. Kanbe, J. I. Shin, H. Tokuno, Eiji Kido, S. Machida, Toshiyuki Nonaka, Yoji Kobayashi, Tatsunobu Shibata, Kenichi Tanaka, S. Nagataki, Masahiro Takeda, Ken Honda, T. Iguchi, J. D. Smith, Peter Tinyakov, S. B. Thomas, Samuel Blake, B. T. Stokes, Grigory Rubtsov, Isaac Myers, Gordon Thomson, M. Ohnishi, K. Miyata, Shoichi Ogio, Sergey Troitsky, Kiyoshi Kuramoto, Shunsuke Ozawa, Akimichi Taketa, Igor Tkachev, Pierre Sokolsky, R. Cady, K. Hayashi, R. Azuma, T. Matsuura, Oleg Kalashev, D. Rodriguez, G. Vasiloff, R. Aida, W. R. Cho, Hyun-Il Kim, Jyunsei Chiba, Takaaki Ishii, Y. Tsuyuguchi, Dongsu Ryu, K. Martens, HangBae Kim, Naoaki Hayashida, Masato Takita, Tomohiro Matsuda, M. Wood, Kenichi Kadota, B. K. Shin, S. Iwamoto, K. Kobayashi, H. Yamaoka, Y. Wada, S. Suzuki, Y. Yamakawa, Douglas Bergman, H. Ohoka, D. Oku, K. Hiyama, J. Yang, J. Lan, X. Zhou, Mark Allen, and R. Zollinger

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Surface (mathematics), 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Detector, FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, 01 natural sciences, 7. Clean energy, law.invention, Computational physics, Telescope, Space and Planetary Science, law, 0103 physical sciences, Energy spectrum, Cutoff, Astrophysics - High Energy Astrophysical Phenomena, 010303 astronomy & astrophysics, Energy (signal processing)
Abstract

The Telescope Array (TA) collaboration has measured the energy spectrum of ultra-high energy cosmic rays with primary energies above 1.6 x 10^(18) eV. This measurement is based upon four years of observation by the surface detector component of TA. The spectrum shows a dip at an energy of 4.6 x 10^(18) eV and a steepening at 5.4 x 10^(19) eV which is consistent with the expectation from the GZK cutoff. We present the results of a technique, new to the analysis of ultra-high energy cosmic ray surface detector data, that involves generating a complete simulation of ultra-high energy cosmic rays striking the TA surface detector. The procedure starts with shower simulations using the CORSIKA Monte Carlo program where we have solved the problems caused by use of the "thinning" approximation. This simulation method allows us to make an accurate calculation of the acceptance of the detector for the energies concerned., Comment: Accepted for publication by Astrophysical Journal Letters

Published
2013

21. 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

Author

Telescope, Array, Pierre Auger Collaborations (Alexander Aab, Pedro, Abreu, Marco, Aglietta, Eun Joo Ahn, Imen Al Samarai, Ivone, Albuquerque, Ingomar, Allekotte, Jeff, Allen, Patrick, Allison, Alejandro, Almela, Jesus Alvarez Castillo, Jaime Alvarez Muñiz, Rafael Alves Batista, Michelangelo, Ambrosio, Amin, Aminaei, Luis, Anchordoqui, Sofia, Andringa, Carla, Aramo, Victor Manuel Aranda, Fernando, Arqueros, Hernán Gonzalo Asorey, Pedro, Assis, Julien, Aublin, Maximo, Ave, Michel, Avenier, Gualberto, Avila, Nafiun, Awal, Alina Mihaela Badescu, Barber, Kerri B., Julia, Bäuml, Colin, Baus, Jim, Beatty, Karl Heinz Becker, Bellido, Jose A., Corinne, Berat, Mario Edoardo Bertania, Xavier, Bertou, Peter, Biermann, Pierre, Billoir, Blaess, Simon G., Miguel, Blanco, Carla, Bleve, Hans, Blümer, Martina, Boháčová, Denise, Boncioli, Carla, Bonifazi, Raffaella, Bonino, Nataliia, Borodai, Jeffrey, Brack, Iliana, Brancus, Ariel, Bridgeman, Pedro, Brogueira, Brown, William C., Peter, Buchholz, Antonio, Bueno, Stijn, Buitink, Buscemi, Mario, Caballero Mora, Karen S., Barbara, Caccianiga, Lorenzo, Caccianiga, Marina, Candusso, Laurentiu, Caramete, Caruso, Rossella, Antonella, Castellina, Gabriella, Cataldi, Lorenzo, Cazon, Rosanna, Cester, Chavez, Alan G., Andrea, Chiavassa, Jose Augusto Chinellato, Jiri, Chudoba, Marco, Cilmo, Clay, Roger W., Giuseppe, Cocciolo, Roberta, Colalillo, Alan, Coleman, Laura, Collica, Maria Rita Coluccia, Ruben, Conceição, Fernando, Contreras, Cooper, Mathew J., Alain, Cordier, Stephane, Coutu, Corbin, Covault, James, Cronin, Alex, Curutiu, Richard, Dallier, Bruno, Daniel, Sergio, Dasso, Kai, Daumiller, Dawson, Bruce R., de Almeida, Rogerio M., Manlio De Domenico, de Jong, Sijbrand J., Joao de Mello Neto, Ivan De Mitri, Jaime de Oliveira, Vitor de Souza, Luis del Peral, Olivier, Deligny, Hans, Dembinski, Niraj, Dhital, Claudio Di Giulio, Armando Di Matteo, Johana Chirinos Diaz, Mary Lucia Díaz Castro, Francisco, Diogo, Carola, Dobrigkeit, Wendy, Docters, Juan Carlos D'Olivo, Alexei, Dorofeev, Qader Dorosti Hasankiadeh, Maria Teresa Dova, Jan, Ebr, Ralph, Engel, Martin, Erdmann, Mona, Erfani, Escobar, Carlos O., Joao, Espadanal, Alberto, Etchegoyen, Pedro Facal San Luis, Heino, Falcke, Fang, Ke, Glennys, Farrar, Anderson, Fauth, Norberto, Fazzini, Ferguson, Andrew P., Mateus, Fernandes, Brian, Fick, Juan Manuel Figueira, Alberto, Filevich, Andrej, Filipčič, Brendan, Fox, Octavian, Fratu, Uwe, Fröhlich, Benjamin, Fuchs, Toshihiro, Fujii, Romain, Gaior, Beatriz, García, Sayri Tupac Garcia Roca, Diego Garcia Gamez, Diego Garcia Pinto, Gianpaolo, Garilli, Alberto Gascon Bravo, Florian, Gate, Hartmut, Gemmeke, Piera Luisa Ghia, Ugo, Giaccari, Marco, Giammarchi, Maria, Giller, Christian, Glaser, Henry, Glass, Mariano Gómez Berisso, Gómez Vitale, Primo F., Patrícia, Gonçalves, Gonzalez, Javier G., Nicolás, González, Ben, Gookin, Jacob, Gordon, Alessio, Gorgi, Peter, Gorham, Philippe, Gouffon, Stefan, Grebe, Nathan, Griffith, Aurelio, Grillo, Grubb, Trent D., Fausto, Guarino, Germano, Guedes, Matías Rolf Hampel, Patricia, Hansen, Diego, Harari, Harrison, Thomas A., Sebastian, Hartmann, John, Harton, Andreas, Haungs, Thomas, Hebbeker, Dieter, Heck, Philipp, Heimann, Herve, Alexander E., Hill, Gary C., Carlos, Hojvat, Nicholas, Hollon, Ewa, Holt, Piotr, Homola, Jörg, Hörandel, Pavel, Horvath, Miroslav, Hrabovský, Daniel, Huber, Tim, Huege, Antonio, Insolia, Paula Gina Isar, Ingolf, Jandt, Stefan, Jansen, Cecilia, Jarne, Mariela, Josebachuili, Alex, Kääpä, Olga, Kambeitz, Karl Heinz Kampert, Peter, Kasper, Igor, Katkov, Balazs, Kégl, Bianca, Keilhauer, Azadeh, Keivani, Ernesto, Kemp, Roger, Kieckhafer, Hans, Klages, Matthias, Kleifges, Jonny, Kleinfeller, Raphael, Krause, Nicole, Krohm, Oliver, Krömer, Daniel Kruppke Hansen, Daniel, Kuempel, Norbert, Kunka, Danielle, Lahurd, Luca, Latronico, Robert, Lauer, Markus, Lauscher, Pascal, Lautridou, Sandra Le Coz, Milton, Leão, Didier, Lebrun, Paul, Lebrun, Marcelo Augusto Leigui de Oliveira, Antoine Letessier Selvon, Isabelle Lhenry Yvon, Katrin, Link, Rebeca, López, Angeles Lopez Agüera, Karim, Louedec, Julio Lozano Bahilo, Lu, Lu, Agustin, Lucero, Marianne, Ludwig, Max, Malacari, Simone, Maldera, Manuela, Mallamaci, Jennifer, Maller, Dusan, Mandat, Paul, Mantsch, Analisa, Mariazzi, Vincent, Marin, Ioana, Mariş, Giovanni, Marsella, Daniele, Martello, Lilian, Martin, Humberto, Martinez, Oscar Martínez Bravo, Diane, Martraire, Jimmy Masías Meza, Hermann Josef Mathes, Sebastian, Mathys, James, Matthews, John, Matthews, Giorgio, Matthiae, Detlef, Maurel, Daniela, Maurizio, Eric, Mayotte, Peter, Mazur, Carlos, Medina, Gustavo Medina Tanco, Rebecca, Meissner, Maximilien, Melissas, Diego, Melo, Alexander, Menshikov, Stefano, Messina, Rishi, Meyhandan, Saša, Mićanović, Maria Isabel Micheletti, Lukas, Middendorf, Minaya, Ignacio A., Lino, Miramonti, Bogdan, Mitrica, Laura Molina Bueno, Silvia, Mollerach, Maria, Monasor, Delphine Monnier Ragaigne, François, Montanet, Carlo, Morello, Miguel, Mostafá, Moura, Celio A., Marcio Aparecido Muller, Gero, Müller, Sarah, Müller, Moritz, Münchmeyer, Roberto, Mussa, Gianni, Navarra, Sergio, Navas, Petr, Necesal, Lukas, Nellen, Anna, Nelles, Jens, Neuser, Nguyen, Phong H., Marcus, Niechciol, Lukas, Niemietz, Tim, Niggemann, Dave, Nitz, Dalibor, Nosek, Vladimir, Novotny, Lyberis, Nožka, Livingstone, Ochilo, Angela, Olinto, Micael, Oliveira, Noelia, Pacheco, Daniel Pakk Selmi Dei, Miroslav, Palatka, Juan, Pallotta, Nunzia, Palmieri, Philipp, Papenbreer, Gonzalo, Parente, Alejandra, Parra, Thomas, Paul, Miroslav, Pech, Jan, Pękala, Rodrigo, Pelayo, Iuri, Pepe, Lorenzo, Perrone, Emily, Petermann, Christine, Peters, Sergio, Petrera, Yevgeniy, Petrov, Jamyang, Phuntsok, Ricardo, Piegaia, Tanguy, Pierog, Pablo, Pieroni, Mário, Pimenta, Valerio, Pirronello, Manuel, Platino, Matthias, Plum, Alessio, Porcelli, Czeslaw, Porowski, Raul Ribeiro Prado, Paolo, Privitera, Michael, Prouza, Victor, Purrello, Quel, Eduardo J., Sven, Querchfeld, Sean, Quinn, Julian, Rautenberg, Olivier, Ravel, Diego, Ravignani, Benoît, Revenu, Jan, Ridky, Simone, Riggi, Markus, Risse, Pablo, Ristori, Vincenzo, Rizi, Washington Rodrigues de Carvalho, Iago Rodriguez Cabo, Gonzalo Rodriguez Fernandez, Jorge Rubén Rodriguez Rojo, Maria Dolores Rodríguez Frías, Dmytro, Rogozin, Germán, Ros, Jaime, Rosado, Tomas, Rossler, Markus, Roth, Esteban, Roulet, Adrian, Rovero, Saffi, Steven J., Alexandra, Saftoiu, Francesco, Salamida, Humberto, Salazar, Ahmed, Saleh, Francisco Salesa Greus, Gaetano, Salina, Federico, Sánchez, Patricia Sanchez Lucas, Santo, Catarina E., Edivaldo Moura Santos, Eva, Santos, Fred, Sarazin, Biswaijt, Sarkar, Raul, Sarmento, Ricardo, Sato, Nils, Scharf, Viviana, Scherini, Harald, Schieler, Peter, Schiffer, David, Schmidt, Olaf, Scholten, Harm, Schoorlemmer, Petr, Schovánek, Alexander, Schulz, Johannes, Schulz, Johannes, Schumacher, Sergio, Sciutto, Alberto, Segreto, Mariangela, Settimo, Amir, Shadkam, Shellard, Ronald C., Iván, Sidelnik, Guenter, Sigl, Octavian, Sima, Andrzej, Śmiałkowski, Radomir, Šmída, Gregory, Snow, Paul, Sommers, Sorokin, J., Ruben, Squartini, Srivastava, Yogendra N., Samo, Stanič, James, Stapleton, Jaroslaw, Stasielak, Maurice, Stephan, Anne, Stutz, Federico, Suarez, Tiina, Suomijärvi, Daniel Supanitsky, A., Michael, Sutherland, John, Swain, Zbigniew, Szadkowski, Marek, Szuba, Oscar Alejandro Taborda, Alex, Tapia, Mathieu, Tartare, Andreas, Tepe, Vanessa Menezes Theodoro, Charles, Timmermans, Todero Peixoto, Carlos J., Gabriel, Toma, Lenka, Tomankova, Bernardo, Tomé, Aurelio, Tonachini, Guillermo Torralba Elipe, Diego Torres Machado, Petr, Travnicek, Enrica, Trovato, Matias, Tueros, Ralf, Ulrich, Michael, Unger, Martin, Urban, Valdés Galicia, Jose F., Ines, Valiño, Laura, Valore, Guus van Aar, Patrick van Bodegom, van den Berg, Ad M., Sjoert van Velzen, Arjen van Vliet, Enrique, Varela, Bernardo Vargas Cárdenas, Gary, Varner, Vázquez, Jose R., Ricardo, Vázquez, Darko, Veberič, Valerio, Verzi, Jakub, Vicha, Mariela, Videla, Luis, Villaseñor, Brian, Vlcek, Serguei, Vorobiov, Hernan, Wahlberg, Oscar, Wainberg, David, Walz, Alan, Watson, Marc, Weber, Klaus, Weidenhaupt, Andreas, Weindl, Felix, Werner, Allan, Widom, Lawrence, Wiencke, Barbara, Wilczyńska, Henryk, Wilczyński, Martin, Will, Christopher, Williams, Tobias, Winchen, David, Wittkowski, Brian, Wundheiler, Sarka, Wykes, Tokonatsu, Yamamoto, Tolga, Yapici, Guofeng, Yuan, Alexey, Yushkov, Bruno, Zamorano, Enrique, Zas, Danilo, Zavrtanik, Marko, Zavrtanik, Ingyin, Zaw, Arnulfo, Zepeda, Jing, Zhou, Yue, Zhu, Marcelo Zimbres Silva, Michael, Ziolkowski, Francesca, Zuccarello, Rasha, Abbasi, Michihiko, Abe, Tareq Abu Zayyad, Monica, Allen, Robyn, Anderson, Ryuji, Azuma, Elliott, Barcikowski, Belz, John W., Bergman, Douglas R., Samuel Adam Blake, Robert, Cady, Min Jung Chae, Byung Gu Cheon, Junsei, Chiba, Michiyuki, Chikawa, Woo Ram Cho, Masaki, Fukushima, Takashi, Goto, William, Hanlon, Yoshio, Hayashi, Naoaki, Hayashida, Kinya, Hibino, Ken, Honda, Daisuke, Ikeda, Naoya, Inoue, Takaaki, Ishii, Rie, Ishimori, Hideo Ito (Utah, U., Riken, Dmitri, Ivanov, Jui, Charles C. H., Kenichi, Kadota, Fumio, Kakimoto, Oleg, Kalashev, Katsuaki, Kasahara, Hideyuki, Kawai, Saburo, Kawakami, Shingo, Kawana, Kazumasa, Kawata, Eiji, Kido, Hang Bae Kim, Ji Hee Kim, Ji Hyun Kim, Seiji, Kitamura, Yuki, Kitamura, Vadim, Kuzmin, Young Joon Kwon, Jian, Lan, Sun In Lim, Jon Paul Lundquist, Kazuhiro, Machida, Kai, Martens, Takeshi, Matsuda, Toshio, Matsuyama, Matthews, John N., Mayuko, Minamino, Keijiro, Mukai, Isaac, Myers, Keisuke, Nagasawa, Shigehiro, Nagataki, Toru, Nakamura, Toshiyuki, Nonaka, Asuka, Nozato, Shoichi, Ogio, Jun, Ogura, Munehiro, Ohnishi, Hideyuki, Ohoka, Kaoru, Oki, Takeshi, Okuda, Masaomi, Ono, Akitoshi, Oshima, Shunsuke, Ozawa, Park, Il H., Pshirkov, Maxim S., Douglas Chase Rodriguez, Grigory, Rubtsov, Dongsu, Ryu, Hiroyuki, Sagawa, Nobuyuki, Sakurai, Sampson, Amanda L., Scott, Lauren M., Priti Dhanesh Shah, Fumiya, Shibata, Tatsunobu, Shibata, Hideaki, Shimodaira, Bok Kyun Shin, Smith, Jeremy D., Pierre, Sokolsky, Wayne Springer, R., Benjamin Taylor Stokes, Stratton, Sean R., Thomas, Stroman, Takumi, Suzawa, Mai, Takamura, Masahiro, Takeda, Ryuji, Takeishi, Akimichi, Taketa, Masato, Takita, Yuichiro, Tameda, Hideki, Tanaka, Koichi, Tanaka, Manobu, Tanaka, Thomas, Stanton B., Thomson, Gordon B., Peter, Tinyakov, Igor, Tkachev, Hisao, Tokuno, Takayuki, Tomida, Sergey, Troitsky, Yoshiki, Tsunesada, Kazuki, Tsutsumi, Yukio, Uchihori, Shigeharu, Udo, Federico, Urban, Gina, Vasiloff, Tiffany, Wong, Hiroshi, Yamaoka, Katsuya, Yamazaki, Jongmann, Yang, Kenta, Yashiro, Shigeru, Yoshida, Hisashi, Yoshii, Rhett, Zollinger, Zachary, Zundel, Shogo, Konishi, Shingo, Wachi, Yoshiki, Nishimoto, Heungsu, Shin, Mai, Tsujimoto, Tomoya, Matsuhira, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire SUBATECH Nantes (SUBATECH), Mines Nantes (Mines Nantes)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Unité Scientifique de la Station de Nançay (USN), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), PIERRE AUGER, Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Nantes (UN)-Mines Nantes (Mines Nantes), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers en région Centre (OSUC), Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Université d'Orléans (UO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), A., Aab, P., Abreu, M., Aglietta, E. J., Ahn, I., Al Samarai, I. F. M., Albuquerque, I., Allekotte, J., Allen, P., Allison, A., Almela, J., Alvarez Castillo, J., Alvarez Mu?iz, R., Alves Batista, M., Ambrosio, A., Aminaei, L., Anchordoqui, S., Andringa, Aramo, Carla, F., Arquero, H., Asorey, P., Assi, J., Aublin, M., Ave, M., Avenier, G., Avila, A. M., Badescu, K. B., Barber, J., B?uml, C., Bau, J. J., Beatty, K. H., Becker, J. A., Bellido, C., Berat, M. E., Bertaina, X., Bertou, P. L., Biermann, P., Billoir, M., Blanco, C., Bleve, H., Bl?mer, M., Boh??ov?, D., Boncioli, C., Bonifazi, R., Bonino, N., Borodai, J., Brack, I., Brancu, P., Brogueira, W. C., Brown, P., Buchholz, A., Bueno, S., Buitink, Buscemi, Mario, K. S., Caballero Mora, B., Caccianiga, L., Caccianiga, M., Candusso, L., Caramete, R., Caruso, A., Castellina, G., Cataldi, L., Cazon, R., Cester, A. G., Chavez, A., Chiavassa, J. A., Chinellato, J., Chudoba, Cilmo, Marco, R. W., Clay, G., Cocciolo, Colalillo, Roberta, A., Coleman, L., Collica, M. R., Coluccia, R., Concei??o, F., Contrera, M. J., Cooper, A., Cordier, S., Coutu, C. E., Covault, J., Cronin, A., Curutiu, R., Dallier, B., Daniel, S., Dasso, K., Daumiller, B. R., Dawson, R. M., de Almeida, M., De Domenico, S. J., de Jong, J. R. T., de Mello Neto, I., De Mitri, J., de Oliveira, V., de Souza, L., del Peral, O., Deligny, H., Dembinski, N., Dhital, C., Di Giulio, A., Di Matteo, J. C., Diaz, M. L., D?az Castro, F., Diogo, C., Dobrigkeit, W., Docter, J. C., D'Olivo, A., Dorofeev, Q., Dorosti Hasankiadeh, M. T., Dova, J., Ebr, R., Engel, M., Erdmann, M., Erfani, C. O., Escobar, J., Espadanal, A., Etchegoyen, P., Facal San Lui, H., Falcke, K., Fang, G., Farrar, A. C., Fauth, N., Fazzini, A. P., Ferguson, M., Fernande, B., Fick, J. M., Figueira, A., Filevich, A., Filip?i?, B. D., Fox, O., Fratu, U., Fr?hlich, B., Fuch, T., Fuji, R., Gaior, B., Garc?a, S. T., Garcia Roca, D., Garcia Gamez, D., Garcia Pinto, G., Garilli, A., Gascon Bravo, F., Gate, H., Gemmeke, P. L., Ghia, U., Giaccari, M., Giammarchi, M., Giller, C., Glaser, H., Gla, M., G?mez Berisso, P. F., G?mez Vitale, P., Gon?alve, J. G., Gonzalez, N., Gonz?lez, B., Gookin, A., Gorgi, P., Gorham, P., Gouffon, S., Grebe, N., Griffith, A. F., Grillo, T. D., Grubb, Y., Guardincerri, Guarino, Fausto, G. P., Guede, M. R., Hampel, P., Hansen, D., Harari, T. A., Harrison, S., Hartmann, J. L., Harton, A., Haung, T., Hebbeker, D., Heck, P., Heimann, A. E., Herve, G. C., Hill, C., Hojvat, N., Hollon, E., Holt, P., Homola, J. R., H?randel, P., Horvath, M., Hrabovsk?, D., Huber, T., Huege, A., Insolia, P. G., Isar, K., Islo, I., Jandt, S., Jansen, C., Jarne, M., Josebachuili, A., K??p?, O., Kambeitz, K. H., Kampert, P., Kasper, I., Katkov, B., K?gl, B., Keilhauer, A., Keivani, E., Kemp, R. M., Kieckhafer, H. O., Klage, M., Kleifge, J., Kleinfeller, R., Krause, N., Krohm, O., Kr?mer, D., Kruppke Hansen, D., Kuempel, N., Kunka, G., La Rosa, D., Lahurd, L., Latronico, R., Lauer, M., Lauscher, P., Lautridou, S., Le Coz, M. S. A. B., Le?o, D., Lebrun, P., Lebrun, M. A., Leigui de Oliveira, A., Letessier Selvon, I., Lhenry Yvon, K., Link, R., L?pez, A., Lopez Ag?era, K., Louedec, J., Lozano Bahilo, L., Lu, A., Lucero, M., Ludwig, M. C., Maccarone, M., Malacari, S., Maldera, M., Mallamaci, J., Maller, D., Mandat, P., Mantsch, A. G., Mariazzi, V., Marin, I. C., Mari?, G., Marsella, D., Martello, L., Martin, H., Martinez, O., Mart?nez Bravo, D., Martraire, J. J., Mas?as Meza, H. J., Mathe, S., Mathy, J. A. J., Matthew, J., Matthew, G., Matthiae, D., Maurel, D., Maurizio, E., Mayotte, P. O., Mazur, C., Medina, G., Medina Tanco, M., Melissa, D., Melo, E., Menichetti, A., Menshikov, S., Messina, R., Meyhandan, S., Mi?anovi?, M. I., Micheletti, L., Middendorf, I. A., Minaya, L., Miramonti, B., Mitrica, L., Molina Bueno, S., Mollerach, M., Monasor, D., Monnier Ragaigne, F., Montanet, C., Morello, M., Mostaf?, C. A., Moura, M. A., Muller, G., M?ller, M., M?nchmeyer, R., Mussa, G., Navarra, S., Nava, P., Necesal, L., Nellen, A., Nelle, J., Neuser, M., Niechciol, L., Niemietz, T., Niggemann, D., Nitz, D., Nosek, V., Novotny, L., No?ka, L., Ochilo, A., Olinto, M., Oliveira, N., Pacheco, D., Pakk Selmi Dei, M., Palatka, J., Pallotta, N., Palmieri, P., Papenbreer, G., Parente, A., Parra, T., Paul, M., Pech, J., P?kala, R., Pelayo, I. M., Pepe, L., Perrone, R., Pesce, E., Petermann, C., Peter, S., Petrera, A., Petrolini, Y., Petrov, J., Phuntsok, R., Piegaia, T., Pierog, P., Pieroni, M., Pimenta, V., Pirronello, M., Platino, M., Plum, A., Porcelli, C., Porowski, R. R., Prado, P., Privitera, M., Prouza, V., Purrello, E. J., Quel, S., Querchfeld, S., Quinn, J., Rautenberg, O., Ravel, D., Ravignani, B., Revenu, J., Ridky, S., Riggi, M., Risse, P., Ristori, V., Rizi, J., Robert, W., Rodrigues de Carvalho, I., Rodriguez Cabo, G., Rodriguez Fernandez, J., Rodriguez Rojo, M. D., Rodr?guez Fr?a, G., Ro, J., Rosado, T., Rossler, M., Roth, E., Roulet, A. C., Rovero, S. J., Saffi, A., Saftoiu, F., Salamida, H., Salazar, A., Saleh, F., Salesa Greu, G., Salina, F., S?nchez, P., Sanchez Luca, C. E., Santo, E., Santo, E. M., Santo, F., Sarazin, B., Sarkar, R., Sarmento, R., Sato, N., Scharf, V., Scherini, H., Schieler, P., Schiffer, O., Scholten, H., Schoorlemmer, P., Schov?nek, A., Schulz, J., Schulz, J., Schumacher, S. J., Sciutto, A., Segreto, M., Settimo, A., Shadkam, R. C., Shellard, I., Sidelnik, G., Sigl, O., Sima, A., ?mia?kowski, R., ?m?da, G. R., Snow, P., Sommer, J., Sorokin, R., Squartini, Y. 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Troitsky, Y. Tsunesada, K. Tsutsumi, Y. Uchihori, S. Udo, F. Urban, G. Vasiloff, T. Wong, R. Yamane, H. Yamaoka, K. Yamazaki, J. Yang, K. Yashiro, Y. Yoneda, S. Yoshida, H. Yoshii, R. Zollinger, Z. Zundel, T. T. Array, and Research unit Astroparticle Physics

Subjects
Ciencias Físicas, Astronomy, Rays, Astrophysics, Astroparticle physics, Cosmic rays, 01 natural sciences, law.invention, Pierre, law, Anisotropy, Telescope, 010303 astronomy & astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, [PHYS]Physics [physics], Energy, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astrophysics::Instrumentation and Methods for Astrophysics, astroparticle physic, Radiación cósmica, Auger, Cosmic, Arrival, ComputingMethodologies_DOCUMENTANDTEXTPROCESSING, Física nuclear, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, CIENCIAS NATURALES Y EXACTAS, High, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Cosmic ray, SURFACE DETECTOR, ICECUBE, AIR-SHOWER ARRAY, Directions, cosmic rays, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), Ciencias Exactas, Pierre Auger Observatory, SPECTRUM, 010308 nuclear & particles physics, Array, Spectral density, Spherical harmonics, Física, Astronomy and Astrophysics, ASTROFÍSICA, Ultra, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], Astronomía, Dipole, RESOLUTION, Space and Planetary Science, Experimental High Energy Physics, Quadrupole, Observatory, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

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 1019 eV is presented in this work. The resulting multipolar expansion of the flux of cosmic rays allows us to perform a series of anisotropy searches, and in particular to report on the angular power spectrum of cosmic rays above 1019 eV. No significant deviation from isotropic expectations is found throughout the analyses performed. Upper limits on the amplitudes of the dipole and quadrupole moments are derived as a function of the direction in the sky, varying between 7% and 13% for the dipole and between 7% and 10% for a symmetric quadrupole., Facultad de Ciencias Exactas

Published
2014

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