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1. Observations of the Origin of Downward Terrestrial Gamma-Ray Flashes

Author: Belz, J. W., Krehbiel, P. R., Remington, J., Stanley, M. A., Abbasi, R. U., LeVon, R., Rison, W., Rodeheffer, D., Collaboration, the Telescope Array Scientific, Abu-Zayyad, T., Allen, M., Barcikowski, E., Bergman, D. R., Blake, S. A., Byrne, M., Cady, R., Cheon, B. G., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fujiwara, R., Fukushima, M., Furlich, G., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inadomi, T., Inoue, N., Ishii, T., Ito, H., Ivanov, D., Iwakura, H., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kasami, S., Kawai, H., Kawakami, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Matsumiya, H., Matthews, J. N., Matuyama, T., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagataki, S., Nakai, K., Nakamura, R., Nakamura, T., Nakamura, Y., Nonaka, T., Oda, H., Ogio, S., Ohnishi, M., Ohoka, H., Oku, Y., Okuda, T., Omura, Y., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Potts, M., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sako, T., Sakurai, N., Sano, K., Seki, T., Sekino, K., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Sone, N., Stokes, B. T., Stroman, T. A., Takagi, Y., Takahashi, Y., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, K., Tanaka, M., Tanoue, Y., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Uchihori, Y., Udo, S., Uehama, T., Urban, F., Wallace, M., Wong, T., Yamamoto, M., Yamaoka, H., Yamazaki, K., Yashiro, K., Yosei, M., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Physics - Atmospheric and Oceanic Physics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: In this paper we report the first close, high-resolution observations of downward-directed terrestrial gamma-ray flashes (TGFs) detected by the large-area Telescope Array cosmic ray observatory, obtained in conjunction with broadband VHF interferometer and fast electric field change measurements of the parent discharge. The results show that the TGFs occur during strong initial breakdown pulses (IBPs) in the first few milliseconds of negative cloud-to-ground and low-altitude intracloud flashes, and that the IBPs are produced by a newly-identified streamer-based discharge process called fast negative breakdown. The observations indicate the relativistic runaway electron avalanches (RREAs) responsible for producing the TGFs are initiated by embedded spark-like transient conducting events (TCEs) within the fast streamer system, and potentially also by individual fast streamers themselves. The TCEs are inferred to be the cause of impulsive sub-pulses that are characteristic features of classic IBP sferics. Additional development of the avalanches would be facilitated by the enhanced electric field ahead of the advancing front of the fast negative breakdown. In addition to showing the nature of IBPs and their enigmatic sub-pulses, the observations also provide a possible explanation for the unsolved question of how the streamer to leader transition occurs during the initial negative breakdown, namely as a result of strong currents flowing in the final stage of successive IBPs, extending backward through both the IBP itself and the negative streamer breakdown preceding the IBP., Comment: Typo fixed and reference added. Manuscript is 36 pages. Supplemental Information is 42 pages. This paper is to be published in the Journal of Geophysical Research: Atmospheres. Online data repository: Open Science Framework DOI: 10.17605/OSF.IO/Z3XDA
Published: 2020
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2. Search for Ultra-High-Energy Neutrinos with the Telescope Array Surface Detector

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujisue, K., Fujita, K., Fujiwara, R., Fukushima, M., Furlich, G., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakai, K., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sako, T., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Tanoue, Y., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yada, K., Yamamoto, M., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present an upper limit on the flux of ultra-high-energy down-going neutrinos for $E > 10^{18}\ \mbox{eV}$ derived with the nine years of data collected by the Telescope Array surface detector (05-11-2008 -- 05-10-2017). The method is based on the multivariate analysis technique, so-called Boosted Decision Trees (BDT). Proton-neutrino classifier is built upon 16 observables related to both the properties of the shower front and the lateral distribution function., Comment: 10 pages, 4 figures, accepted to JETP
Published: 2019
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3. Search for point sources of ultra-high energy photons with the Telescope Array surface detector

Author: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., diMatteo, A., Fujii, T., Fujita, K., Fujiwara, R., Fukushima, M., Furlich, G., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagataki, S., Nakai, K., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sako, T., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Tanoue, Y., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yada, K., Yamamoto, M., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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. Constraints on the diffuse photon flux with energies above $10^{18}$ eV using the surface detector of the Telescope Array experiment

Author: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Piskunov, M. S., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, High Energy Physics - Phenomenology
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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5. 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: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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
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6. Mass composition of ultra-high-energy cosmic rays with the Telescope Array Surface Detector Data

Author: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Piskunov, M. S., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The results on ultra-high-energy cosmic rays (UHECR) mass composition obtained with the Telescope Array surface detector are presented. The analysis employs the boosted decision tree (BDT) multivariate analysis built upon 14 observables related to both the properties of the shower front and the lateral distribution function. The multivariate classifier is trained with Monte-Carlo sets of events induced by the primary protons and iron. An average atomic mass of UHECR is presented for energies $10^{18.0}-10^{20.0}\ \mbox{eV}$. The average atomic mass of primary particles shows no significant energy dependence and corresponds to $\langle \ln A \rangle = 2.0 \pm 0.1 (stat.) \pm 0.44 (syst.)$. The result is compared to the mass composition obtained by the Telescope Array with $\mbox{X}_{\mbox{max}}$ technique along with the results of other experiments. Possible systematic errors of the method are discussed., Comment: 11 pages, 9 figures
Published: 2018
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7. Study of muons from ultra-high energy cosmic ray air showers measured with the Telescope Array experiment

Author: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S. M., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: One of the uncertainties in interpretation of ultra-high energy cosmic ray (UHECR) data comes from the hadronic interaction models used for air shower Monte Carlo (MC) simulations. The number of muons observed at the ground from UHECR-induced air showers is expected to depend upon the hadronic interaction model. One may therefore test the hadronic interaction models by comparing the measured number of muons with the MC prediction. In this paper, we present the results of studies of muon densities in UHE extensive air showers obtained by analyzing the signal of surface detector stations which should have high $\it{muon \, purity}$. The muon purity of a station will depend on both the inclination of the shower and the relative position of the station. In 7 years' data from the Telescope Array experiment, we find that the number of particles observed for signals with an expected muon purity of $\sim$65% at a lateral distance of 2000 m from the shower core is $1.72 \pm 0.10{\rm (stat.)} \pm 0.37 {\rm (syst.)}$ times larger than the MC prediction value using the QGSJET II-03 model for proton-induced showers. A similar effect is also seen in comparisons with other hadronic models such as QGSJET II-04, which shows a $1.67 \pm 0.10 \pm 0.36$ excess. We also studied the dependence of these excesses on lateral distances and found a slower decrease of the lateral distribution of muons in the data as compared to the MC, causing larger discrepancy at larger lateral distances.
Published: 2018
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8. The Cosmic-Ray Energy Spectrum between 2 PeV and 2 EeV Observed with the TALE detector in monocular mode

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S. M., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Nozato, A., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We report on a measurement of the cosmic ray energy spectrum by the Telescope Array Low-Energy Extension (TALE) air fluorescence detector. The TALE air fluorescence detector is also sensitive to the Cherenkov light produced by shower particles. Low energy cosmic rays, in the PeV energy range, are detectable by TALE as "Cherenkov Events". Using these events, we measure the energy spectrum from a low energy of $\sim 2$ PeV to an energy greater than 100 PeV. Above 100 PeV TALE can detect cosmic rays using air fluorescence. This allows for the extension of the measurement to energies greater than a few EeV. In this paper, we will describe the detector, explain the technique, and present results from a measurement of the spectrum using $\sim 1000$ hours of observation. The observed spectrum shows a clear steepening near $10^{17.1}$ eV, along with an ankle-like structure at $10^{16.2}$ eV. These features present important constraints on galactic cosmic rays origin and propagation models. The feature at $10^{17.1}$ eV may also mark the end of the galactic cosmic rays flux and the start of the transition to extra-galactic sources., Comment: 26 pages, 24 figures, submitted to ApJ
Published: 2018
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9. Evidence of Intermediate-Scale Energy Spectrum Anisotropy of Cosmic Rays E$\geq$10$^{19.2}$ eV with the Telescope Array Surface Detector

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S. M., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Nozato, A., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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$$E$$<$$10^{19.75}$ eV and an excess for $E$$\geq$$10^{19.75}$ eV. The post-trial probability of this energy anisotropy, appearing by chance anywhere on an isotropic sky, is found by Monte Carlo simulation to be $9$$\times$$10^{-5}$ ($3.74$$\sigma_{global}$).
Published: 2018
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10. 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: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, S. M., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lubsandorzhiev, B., Lundquist, J. P., Machida, M., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Nozato, A., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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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11. Search for Anisotropy in the Ultra High Energy Cosmic Ray Spectrum using the Telescope Array Surface Detector

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashi, M., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lan, J., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Sekino, K., Shah, P. D., Shibata, T., Shibata, F., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, M., Tanaka, K., Tanaka, H., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Telescope Array (TA) experiment is located in the western desert of Utah, USA, and observes ultra high energy cosmic rays (UHECRs) in the Northern hemisphere. At the highest energies, $E>10$~EeV, the shape of cosmic ray energy spectrum may carry an imprint of the source density distribution along the line of sight different in different directions of the sky. In this study, we search for such directional variations in the shape of the energy spectrum using events observed with the Telescope Array's surface detector. We divide the TA field of view into two nearly equal-exposure regions: the "on-source" region which we define as $\pm 30^\circ$ of the supergalactic plane containing mostly nearby structures, and the complementary "off-source" region where the sources are further away on average. We compare the UHECR spectra in these regions by fitting them to the broken power law and comparing the resulting parameters. We find that the off-source spectrum has an earlier break at highest energies. The chance probability to obtain such or larger difference in statistically equivalent distributions is estimated as $6.2\pm1.1\times10^{-4}$ ($3.2\sigma$) by a Monte-Carlo simulation. The observed difference in spectra is in a reasonable quantitative agreement with a simplified model that assumes that the UHECR sources trace the galaxy distribution from the 2MRS catalogue, primary particles are protons and the magnetic deflections can be neglected., Comment: 17 pages 6 figures, submitted to Physical Review Letters, (31.May.2017)
Published: 2017

12. Gamma-ray Showers Observed at Ground Level in Coincidence With Downward Lightning Leaders

Author: Abbasi, R. U., Abu-Zayyad, T., Allen, M., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Byrne, M., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Fujii, T., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ito, H., Ivanov, D., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S. S., Krehbiel, P. R., Kuzmin, V., Kwon, Y. J., Lan, J., LeVon, R., Lundquist, J. P., Machida, K., Martens, K., Matuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rison, W., Rodeheffer, D., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Saito, K., Sakaki, N., Sakurai, N., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stroman, T. A., Takai, H., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, R. J., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., and Zundel, Z.
Subjects: Physics - Atmospheric and Oceanic Physics, Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment
Abstract: Bursts of gamma ray showers have been observed in coincidence with downward propagating negative leaders in lightning flashes by the Telescope Array Surface Detector (TASD). The TASD is a 700~square kilometer cosmic ray observatory located in southwestern Utah, U.S.A. In data collected between 2014 and 2016, correlated observations showing the structure and temporal development of three shower-producing flashes were obtained with a 3D lightning mapping array, and electric field change measurements were obtained for an additional seven flashes, in both cases co-located with the TASD. National Lightning Detection Network (NLDN) information was also used throughout. The showers arrived in a sequence of 2--5 short-duration ($\le$10~$\mu$s) bursts over time intervals of several hundred microseconds, and originated at an altitude of $\simeq$3--5 kilometers above ground level during the first 1--2 ms of downward negative leader breakdown at the beginning of cloud-to-ground lightning flashes. The shower footprints, associated waveforms and the effect of atmospheric propagation indicate that the showers consist primarily of downward-beamed gamma radiation. This has been supported by GEANT simulation studies, which indicate primary source fluxes of $\simeq$$10^{12}$--$10^{14}$ photons for $16^{\circ}$ half-angle beams. We conclude that the showers are terrestrial gamma-ray flashes (TGFs), similar to those observed by satellites, but that the ground-based observations are more representative of the temporal source activity and are also more sensitive than satellite observations, which detect only the most powerful TGFs.
Published: 2017
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13. Search for EeV Protons of Galactic Origin

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashi, M., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L. M., Sekino, K., Shah, P. D., Shibata, T., Shibata, F., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, M., Tanaka, K., Tanaka, H., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tirone, A. H., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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: 2016
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14. First Upper Limits on the Radar Cross Section of Cosmic-Ray Induced Extensive Air Showers

Author: Abbasi, R. U., Abe, M., Othman, M. Abou Bakr, Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Besson, D., Blake, S. A., Byrne, M., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Farhang-Boroujeny, B., Fujii, T., Fukushima, M., Gillman, W. H., Goto, T., Hanlon, W., Hanson, J. C., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jayanthmurthy, C., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kunwar, S., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Prohira, S., Pshirkov, M. S., Rezazadeh-Reyhani, A., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Schurig, D., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takai, H., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Venkatesh, S., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
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: 2016
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15. Chapter 5. Features of Portable XRF Devices and Their Safe Handling

Author: Yoshii, H., primary
Published: 2022
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16. Search for correlations between the arrival directions of IceCube neutrino events and ultrahigh-energy cosmic rays detected by the Pierre Auger Observatory and the Telescope Array

Author: The IceCube Collaboration, Aartsen, M. G., Abraham, K., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Altmann, D., Anderson, T., Ansseau, I., Archinger, M., Arguelles, C., Arlen, T. C., Auffenberg, J., Bai, X., Barwick, S. W., Baum, V., Bay, R., Beatty, J. J., Tjus, J. Becker, Becker, K. -H., Beiser, E., Berghaus, P., Berley, D., Bernardini, E., Bernhard, A., Besson, D. Z., Binder, G., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D. J., Bohm, C., Börner, M., Bos, F., Bose, D., Böser, S., Botner, O., Braun, J., Brayeur, L., Bretz, H. -P., Buzinsky, N., Casey, J., Casier, M., Cheung, E., Chirkin, D., Christov, A., Clark, K., Classen, L., Coenders, S., Cowen, D. F., Silva, A. H. Cruz, Daughhetee, J., Davis, J. C., Day, M., de André, J. P. A. M., De Clercq, C., Rosendo, E. del Pino, Dembinski, H., De Ridder, S., Desiati, P., de Vries, K. D., de Wasseige, G., de With, M., DeYoung, T., Díaz-Vélez, J. C., di Lorenzo, V., Dumm, J. P., Dunkman, M., Eberhardt, B., Ehrhardt, T., Eichmann, B., Euler, S., Evenson, P. A., Fahey, S., Fazely, A. R., Feintzeig, J., Felde, J., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Fösig, C. -C., Fuchs, T., Gaisser, T. K., Gaior, R., Gallagher, J., Gerhardt, L., Ghorbani, K., Gier, D., Gladstone, L., Glagla, M., Glüsenkamp, T., Goldschmidt, A., Golup, G., Gonzalez, J. G., Góra, D., Grant, D., Griffith, Z., Groß, A., Ha, C., Haack, C., Ismail, A. Haj, Hallgren, A., Halzen, F., Hansen, E., Hansmann, B., Hanson, K., Hebecker, D., Heereman, D., Helbing, K., Hellauer, R., Hickford, S., Hignight, J., Hill, G. C., Hoffman, K. D., Hoffmann, R., Holzapfel, K., Homeier, A., Hoshina, K., Huang, F., Huber, M., Huelsnitz, W., Hulth, P. O., Hultqvist, K., In, S., Ishihara, A., Jacobi, E., Japaridze, G. S., Jeong, M., Jero, K., Jurkovic, M., Kappes, A., Karg, T., Karle, A., Kauer, M., Keivani, A., Kelley, J. L., Kemp, J., Kheirandish, A., Kiryluk, J., Kläs, J., Klein, S. R., Kohnen, G., Koirala, R., Kolanoski, H., Konietz, R., Köpke, L., Kopper, C., Kopper, S., Koskinen, D. J., Kowalski, M., Krings, K., Kroll, G., Kroll, M., Krückl, G., Kunnen, J., Kurahashi, N., Kuwabara, T., Labare, M., Lanfranchi, J. L., Larson, M. J., Lesiak-Bzdak, M., Leuermann, M., Leuner, J., Lu, L., Lünemann, J., Madsen, J., Maggi, G., Mahn, K. B. M., Mandelartz, M., Maruyama, R., Mase, K., Matis, H. S., Maunu, R., McNally, F., Meagher, K., Medici, M., Meli, A., Menne, T., Merino, G., Meures, T., Miarecki, S., Middell, E., Mohrmann, L., Montaruli, T., Morse, R., Nahnhauer, R., Naumann, U., Neer, G., Niederhausen, H., Nowicki, S. C., Nygren, D. R., Pollmann, A. Obertacke, Olivas, A., Omairat, A., O'Murchadha, A., Palczewski, T., Pandya, H., Pankova, D. V., Paul, L., Pepper, J. A., Heros, C. Pérez de los, Pfendner, C., Pieloth, D., Pinat, E., Posselt, J., Price, P. B., Przybylski, G. T., Quinnan, M., Raab, C., Rädel, L., Rameez, M., Rawlins, K., Reimann, R., Relich, M., Resconi, E., Rhode, W., Richman, M., Richter, S., Riedel, B., Robertson, S., Rongen, M., Rott, C., Ruhe, T., Ryckbosch, D., Sabbatini, L., Sander, H. -G., Sandrock, A., Sandroos, J., Sarkar, S., Schatto, K., Schimp, M., Schmidt, T., Schoenen, S., Schöneberg, S., Schönwald, A., Schulte, L., Schumacher, L., Seckel, D., Seunarine, S., Soldin, D., Song, M., Spiczak, G. M., Spiering, C., Stahlberg, M., Stamatikos, M., Stanev, T., Stasik, A., Steuer, A., Stezelberger, T., Stokstad, R. G., Stößl, A., Ström, R., Strotjohann, N. L., Sullivan, G. W., Sutherland, M., Taavola, H., Taboada, I., Tatar, J., Ter-Antonyan, S., Terliuk, A., Tešić, G., Tilav, S., Toale, P. A., Tobin, M. N., Toscano, S., Tosi, D., Tselengidou, M., Turcati, A., Unger, E., Usner, M., Vallecorsa, S., Vandenbroucke, J., van Eijndhoven, N., Vanheule, S., van Santen, J., Veenkamp, J., Vehring, M., Voge, M., Vraeghe, M., Walck, C., Wallace, A., Wallraff, M., Wandkowsky, N., Weaver, Ch., Wendt, C., Westerhoff, S., Whelan, B. J., Wiebe, K., Wiebusch, C. H., Wille, L., Williams, D. R., Wissing, H., Wolf, M., Wood, T. R., Woschnagg, K., Xu, D. L., Xu, X. W., Xu, Y., Yanez, J. P., Yodh, G., Yoshida, S., Collaboration, M. Zoll. The Pierre Auger, Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Samarai, I. Al, Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Castillo, J. Alvarez, Alvarez-Muñiz, J., Batista, R. Alves, Ambrosio, M., Aminaei, A., Anchordoqui, L., Andrada, B., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Awal, N., Badescu, A. M., Baus, C., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Bertou, X., Biermann, P. L., Billoir, P., Blaess, S. G., Blanco, A., Blanco, M., Blazek, J., Bleve, C., Blümer, H., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Botti, A. M., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Briechle, F. L., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Candusso, M., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Diaz, J. C. Chirinos, Chudoba, J., Clay, R. W., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Cordier, A., Coutu, S., Covault, C. E., Dallier, R., D'Amico, S., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., Neto, J. R. T. de Mello, De Mitri, I., de Oliveira, J., de Souza, V., Debatin, J., del Peral, L., Deligny, O., Dhital, N., Di Giulio, C., Di Matteo, A., Castro, M. L. Díaz, Diogo, F., Dobrigkeit, C., Docters, W., D'Olivo, J. C., Dorofeev, A., Anjos, R. C. dos, Dova, M. T., Dundovic, A., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Ferguson, A. P., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., Fujii, T., Fuster, A., Gallo, F., García, B., Garcia-Gamez, D., Garcia-Pinto, D., Gate, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Berisso, M. Gómez, Vitale, P. F. Gómez, González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Griffith, N., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Harton, J. L., Hasankiadeh, Q., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hojvat, C., Hollon, N., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huege, T., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Jarne, C., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Mezek, G. Kukec, Kunka, N., Awad, A. Kuotb, LaHurd, D., Latronico, L., Lauer, R., Lauscher, M., Lautridou, P., Lebrun, D., Lebrun, P., de Oliveira, M. A. Leigui, Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., Casado, A. López, Lucero, A., Malacari, M., Mallamaci, M., Mandat, D., Mantsch, P., Mariazzi, A. G., Marin, V., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Bravo, O. Martínez, Meza, J. J. Masías, Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Maurizio, D., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Mello, V. B. B., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Moura, C. A., Müller, G., Muller, M. A., Müller, S., Naranjo, I., Navas, S., Necesal, P., Nellen, L., Nelles, A., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, H., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pacheco, N., Selmi-Dei, D. Pakk, Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pękala, J., Pelayo, R., Peña-Rodriguez, J., Pepe, I. M., Perrone, L., Petermann, E., Peters, C., Petrera, S., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., de Carvalho, W. Rodrigues, Rojo, J. Rodriguez, Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salazar, H., Saleh, A., Greus, F. Salesa, Salina, G., Gomez, J. D. Sanabria, Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schoorlemmer, H., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Stanca, D., Stanič, S., Stapleton, J., Stasielak, J., Stephan, M., Strafella, F., Stutz, A., Suarez, F., Durán, M. Suarez, Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Timmermans, C., Peixoto, C. J. Todero, Toma, G., Tomankova, L., Tomé, B., Tonachini, A., Elipe, G. Torralba, Machado, D. Torres, Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Galicia, J. F. Valdés, Valiño, I., Valore, L., van Aar, G., van Bodegom, P., Berg, A. M. van den, van Vliet, A., Varela, E., Cárdenas, B. Vargas, Varner, G., Vasquez, R., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Videla, M., Villaseñor, L., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weidenhaupt, K., Weindl, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yapici, T., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zong, Z., Collaboration, F. Zuccarello. The Telescope Array, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and study their cross-correlation with the ultrahigh-energy cosmic ray (UHECR) samples as a function of angular separation. We also study their possible directional correlations using a likelihood method stacking the neutrino arrival directions and adopting different assumptions on the size of the UHECR magnetic deflections. Finally, we perform another likelihood analysis stacking the UHECR directions and using a sample of through-going muon tracks optimized for neutrino point-source searches with sub-degree angular resolution. No indications of correlations at discovery level are obtained for any of the searches performed. The smallest of the p-values comes from the search for correlation between UHECRs with IceCube high-energy cascades, a result that should continue to be monitored., Comment: Replaced with published version. Added journal reference and DOI
Published: 2015
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17. The IceCube Neutrino Observatory, the Pierre Auger Observatory and the Telescope Array: Joint Contribution to the 34th International Cosmic Ray Conference (ICRC 2015)

Author: IceCube Collaboration, Aartsen, M. G., Abraham, K., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., Altmann, D., Anderson, T., Ansseau, I., Archinger, M., Arguelles, C., Arlen, T. C., Auffenberg, J., Bai, X., Barwick, S. W., Baum, V., Bay, R., Beatty, J. J., Tjus, J. Becker, Becker, K. -H., Beiser, E., BenZvi, S., Berghaus, P., Berley, D., Bernardini, E., Bernhard, A., Besson, D. Z., Binder, G., Bindig, D., Bissok, M., Blaufuss, E., Blumenthal, J., Boersma, D. J., Bohm, C., Börner, M., Bos, F., Bose, D., Böser, S., Botner, O., Braun, J., Brayeur, L., Bretz, H. -P., Buzinsky, N., Casey, J., Casier, M., Cheung, E., Chirkin, D., Christov, A., Clark, K., Classen, L., Coenders, S., Cowen, D. F., Silva, A. H. Cruz, Daughhetee, J., Davis, J. C., Day, M., de André, J. P. A. M., De Clercq, C., Rosendo, E. del Pino, Dembinski, H., De Ridder, S., Desiati, P., de Vries, K. D., de Wasseige, G., de With, M., DeYoung, T., Díaz-Vélez, J. C., di Lorenzo, V., Dumm, J. P., Dunkman, M., Eagan, R., Eberhardt, B., Ehrhardt, T., Eichmann, B., Euler, S., Evenson, P. A., Fadiran, O., Fahey, S., Fazely, A. R., Fedynitch, A., Feintzeig, J., Felde, J., Filimonov, K., Finley, C., Fischer-Wasels, T., Flis, S., Fösig, C. -C., Fuchs, T., Gaisser, T. K., Gaior, R., Gallagher, J., Gerhardt, L., Ghorbani, K., Gier, D., Gladstone, L., Glagla, M., Glüsenkamp, T., Goldschmidt, A., Golup, G., Gonzalez, J. G., Góra, D., Grant, D., Groh, J. C., Groß, A., Ha, C., Haack, C., Ismail, A. Haj, Hallgren, A., Halzen, F., Hansmann, B., Hanson, K., Hebecker, D., Heereman, D., Helbing, K., Hellauer, R., Hellwig, D., Hickford, S., Hignight, J., Hill, G. C., Hoffman, K. D., Hoffmann, R., Holzapfel, K., Homeier, A., Hoshina, K., Huang, F., Huber, M., Huelsnitz, W., Hulth, P. O., Hultqvist, K., In, S., Ishihara, A., Jacobi, E., Japaridze, G. S., Jero, K., Jurkovic, M., Kaminsky, B., Kappes, A., Karg, T., Karle, A., Kauer, M., Keivani, A., Kelley, J. L., Kemp, J., Kheirandish, A., Kiryluk, J., Kläs, J., Klein, S. R., Kohnen, G., Koirala, R., Kolanoski, H., Konietz, R., Koob, A., Köpke, L., Kopper, C., Kopper, S., Koskinen, D. J., Kowalski, M., Krings, K., Kroll, G., Kroll, M., Kunnen, J., Kurahashi, N., Kuwabara, T., Labare, M., Lanfranchi, J. L., Larson, M. J., Lesiak-Bzdak, M., Leuermann, M., Leuner, J., Lu, L., Lünemann, J., Madsen, J., Maggi, G., Mahn, K. B. M., Maruyama, R., Mase, K., Matis, H. S., Maunu, R., McNally, F., Meagher, K., Medici, M., Meli, A., Menne, T., Merino, G., Meures, T., Miarecki, S., Middell, E., Middlemas, E., Mohrmann, L., Montaruli, T., Morse, R., Nahnhauer, R., Naumann, U., Neer, G., Niederhausen, H., Nowicki, S. C., Nygren, D. R., Obertacke, A., Olivas, A., Omairat, A., O'Murchadha, A., Palczewski, T., Pandya, H., Paul, L., Pepper, J. A., Heros, C. Pérez de los, Pfendner, C., Pieloth, D., Pinat, E., Posselt, J., Price, P. B., Przybylski, G. T., Pütz, J., Quinnan, M., Raab, C., Rädel, L., Rameez, M., Rawlins, K., Reimann, R., Relich, M., Resconi, E., Rhode, W., Richman, M., Richter, S., Riedel, B., Robertson, S., Rongen, M., Rott, C., Ruhe, T., Ryckbosch, D., Saba, S. M., Sabbatini, L., Sander, H. -G., Sandrock, A., Sandroos, J., Sarkar, S., Schatto, K., Scheriau, F., Schimp, M., Schmidt, T., Schmitz, M., Schoenen, S., Schöneberg, S., Schönwald, A., Schulte, L., Seckel, D., Seunarine, S., Shanidze, R., Smith, M. W. E., Soldin, D., Song, M., Spiczak, G. M., Spiering, C., Stahlberg, M., Stamatikos, M., Stanev, T., Stanisha, N. A., Stasik, A., Stezelberger, T., Stokstad, R. G., Stößl, A., Ström, R., Strotjohann, N. L., Sullivan, G. W., Sutherland, M., Taavola, H., Taboada, I., Ter-Antonyan, S., Terliuk, A., Tešić, G., Tilav, S., Toale, P. A., Tobin, M. N., Toscano, S., Tosi, D., Tselengidou, M., Turcati, A., Unger, E., Usner, M., Vallecorsa, S., Vandenbroucke, J., van Eijndhoven, N., Vanheule, S., van Santen, J., Veenkamp, J., Vehring, M., Voge, M., Vraeghe, M., Walck, C., Wallace, A., Wallraff, M., Wandkowsky, N., Weaver, Ch., Wendt, C., Westerhoff, S., Whelan, B. J., Whitehorn, N., Wichary, C., Wiebe, K., Wiebusch, C. H., Wille, L., Williams, D. R., Wissing, H., Wolf, M., Wood, T. R., Woschnagg, K., Xu, D. L., Xu, X. W., Xu, Y., Yanez, J. P., Yodh, G., Yoshida, S., Zoll, M., Collaboration, Pierre Auger, Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Samarai, I. Al, Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Castillo, J. Alvarez, Alvarez-Muñiz, J., Batista, R. Alves, Ambrosio, M., Aminaei, A., Anastasi, G. A., Anchordoqui, L., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Awal, N., Badescu, A. M., Baus, C., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Bertou, X., Biermann, P. L., Billoir, P., Blaess, S. G., Blanco, A., Blanco, M., Blazek, J., Bleve, C., Blümer, H., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Brogueira, P., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Candusso, M., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Cilmo, M., Clay, R. W., Cocciolo, G., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Cordier, A., Coutu, S., Covault, C. E., Dallier, R., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., Neto, J. R. T. de Mello, De Mitri, I., de Oliveira, J., de Souza, V., del Peral, L., Deligny, O., Dhital, N., Di Giulio, C., Di Matteo, A., Diaz, J. C., Castro, M. L. Díaz, Diogo, F., Dobrigkeit, C., Docters, W., D'Olivo, J. C., Dorofeev, A., Hasankiadeh, Q. Dorosti, Anjos, R. C. dos, Dova, M. T., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Ferguson, A. P., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., Fujii, T., García, B., García-Gámez, D., Garcia-Pinto, D., Gate, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Berisso, M. Gómez, Vitale, P. F. Gómez, González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Griffith, N., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Hartmann, S., Harton, J. L., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Hervé, A. E., Hojvat, C., Hollon, N., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huber, D., Huege, T., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Jarne, C., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Mezek, G. Kukec, Kunka, N., Awad, A. W. Kuotb, LaHurd, D., Latronico, L., Lauer, R., Lauscher, M., Lautridou, P., Coz, S. Le, Lebrun, D., Lebrun, P., de Oliveira, M. A. Leigui, Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., Casado, A. López, Louedec, K., Lucero, A., Malacari, M., Mallamaci, M., Maller, J., Mandat, D., Mantsch, P., Mariazzi, A. G., Marin, V., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Bravo, O. Martínez, Martraire, D., Meza, J. J. Masías, Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Maurizio, D., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Meissner, R., Mello, V. B. B., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Moura, C. A., Müller, G., Muller, M. A., Müller, S., Navas, S., Necesal, P., Nellen, L., Nelles, A., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pacheco, N., Selmi-Dei, D. Pakk, Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pȩkala, J., Pelayo, R., Pepe, I. M., Perrone, L., Petermann, E., Peters, C., Petrera, S., Petrov, Y., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porcelli, A., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., de Carvalho, W. Rodrigues, Rojo, J. Rodriguez, Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Saleh, A., Greus, F. Salesa, Salina, G., Gomez, J. D. Sanabria, Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schoorlemmer, H., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Srivastava, Y. N., Stanca, D., Stanič, S., Stapleton, J., Stasielak, J., Stephan, M., Stutz, A., Suarez, F., Durán, M. Suarez, Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Tibolla, O., Timmermans, C., Peixoto, C. J. Todero, Toma, G., Tomankova, L., Tomé, B., Tonachini, A., Elipe, G. Torralba, Machado, D. Torres, Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Galicia, J. F. Valdés, Valiño, I., Valore, L., van Aar, G., van Bodegom, P., Berg, A. M. van den, van Velzen, S., van Vliet, A., Varela, E., Cárdenas, B. Vargas, Varner, G., Vasquez, R., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Videla, M., Villaseñor, L., Vlcek, B., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weidenhaupt, K., Weindl, A., Welling, C., Werner, F., Widom, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yapici, T., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., Zuccarello, F., Collaboration, Telescope Array, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract: We have conducted three searches for correlations between ultra-high energy cosmic rays detected by the Telescope Array and the Pierre Auger Observatory, and high-energy neutrino candidate events from IceCube. Two cross-correlation analyses with UHECRs are done: one with 39 cascades from the IceCube `high-energy starting events' sample and the other with 16 high-energy `track events'. The angular separation between the arrival directions of neutrinos and UHECRs is scanned over. The same events are also used in a separate search using a maximum likelihood approach, after the neutrino arrival directions are stacked. To estimate the significance we assume UHECR magnetic deflections to be inversely proportional to their energy, with values $3^\circ$, $6^\circ$ and $9^\circ$ at 100 EeV to allow for the uncertainties on the magnetic field strength and UHECR charge. A similar analysis is performed on stacked UHECR arrival directions and the IceCube sample of through-going muon track events which were optimized for neutrino point-source searches., Comment: one proceeding, the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands; will appear in PoS(ICRC2015)
Published: 2015

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

Author: Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., Zundel, Z., Collaboration, Pierre Auger, Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Samarai, I. Al, Albuquerque, I. F. M., Allekotte, I., Allison, P., Almela, A., Castillo, J. Alvarez, Alvarez-Muñiz, J., Batista, R. Alves, Ambrosio, M., Aminaei, A., Anastasi, G. A., Anchordoqui, L., Andringa, S., Aramo, C., Arqueros, F., Arsene, N., Asorey, H., Assis, P., Aublin, J., Avila, G., Awal, N., Badescu, A. M., Baus, C., Beatty, J. J., Becker, K. H., Bellido, J. A., Berat, C., Bertaina, M. E., Bertou, X., Biermann, P. L., Billoir, P., Blaess, S. G., Blanco, A., Blanco, M., Blazek, J., Bleve, C., Blümer, H., Boháčová, M., Boncioli, D., Bonifazi, C., Borodai, N., Brack, J., Brancus, I., Bretz, T., Bridgeman, A., Brogueira, P., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Candusso, M., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Cilmo, M., Clay, R. W., Cocciolo, G., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Cordier, A., Coutu, S., Covault, C. E., Dallier, R., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., de Jong, S. J., De Mauro, G., Neto, J. R. T. de Mello, De Mitri, I., de Oliveira, J., de Souza, V., del Peral, L., Deligny, O., Dhital, N., Di Giulio, C., Di Matteo, A., Diaz, J. C., Castro, M. L. Díaz, Diogo, F., Dobrigkeit, C., Docters, W., D'Olivo, J. C., Dorofeev, A., Hasankiadeh, Q. Dorosti, Anjos, R. C. dos, Dova, M. T., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Ferguson, A. P., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fratu, O., Freire, M. M., García, B., García-Gámez, D., Garcia-Pinto, D., Gate, F., Gemmeke, H., Gherghel-Lascu, A., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Głas, D., Glaser, C., Glass, H., Golup, G., Berisso, M. Gómez, Vitale, P. F. Gómez, González, N., Gookin, B., Gordon, J., Gorgi, A., Gorham, P., Gouffon, P., Griffith, N., Grillo, A. F., Grubb, T. D., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Hartmann, S., Harton, J. L., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Hervé, A. E., Hill, G. C., Hojvat, C., Hollon, N., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huber, D., Huege, T., Insolia, A., Isar, P. G., Jandt, I., Jansen, S., Jarne, C., Johnsen, J. A., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Keilhauer, B., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Kuempel, D., Mezek, G. Kukec, Kunka, N., Awad, A. W. Kuotb, LaHurd, D., Latronico, L., Lauer, R., Lauscher, M., Lautridou, P., Coz, S. Le, Lebrun, D., Lebrun, P., de Oliveira, M. A. Leigui, Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopes, L., López, R., Casado, A. López, Louedec, K., Lucero, A., Malacari, M., Mallamaci, M., Maller, J., Mandat, D., Mantsch, P., Mariazzi, A. G., Marin, V., Mariş, I. C., Marsella, G., Martello, D., Martinez, H., Bravo, O. Martínez, Martraire, D., Meza, J. J. Masías, Mathes, H. J., Mathys, S., Matthews, J., Matthews, J. A. J., Matthiae, G., Maurizio, D., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Meissner, R., Mello, V. B. B., Melo, D., Menshikov, A., Messina, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Molina-Bueno, L., Mollerach, S., Montanet, F., Morello, C., Mostafá, M., Moura, C. A., Müller, G., Muller, M. A., Müller, S., Navas, S., Necesal, P., Nellen, L., Nelles, A., Neuser, J., Nguyen, P. H., Niculescu-Oglinzanu, M., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Núñez, L. A., Ochilo, L., Oikonomou, F., Olinto, A., Pacheco, N., Selmi-Dei, D. Pakk, Palatka, M., Pallotta, J., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pȩkala, J., Pelayo, R., Pepe, I. M., Perrone, L., Petermann, E., Peters, C., Petrera, S., Petrov, Y., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porcelli, A., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Rautenberg, J., Ravel, O., Ravignani, D., Reinert, D., Revenu, B., Ridky, J., Risse, M., Ristori, P., Rizi, V., de Carvalho, W. Rodrigues, Rojo, J. Rodriguez, Rodríguez-Frías, M. D., Rogozin, D., Rosado, J., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Saleh, A., Greus, F. Salesa, Salina, G., Gomez, J. D. Sanabria, Sánchez, F., Sanchez-Lucas, P., Santos, E. M., Santos, E., Sarazin, F., Sarkar, B., Sarmento, R., Sarmiento-Cano, C., Sato, R., Scarso, C., Schauer, M., Scherini, V., Schieler, H., Schmidt, D., Scholten, O., Schoorlemmer, H., Schovánek, P., Schröder, F. G., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sigl, G., Sima, O., Śmiałkowski, A., Šmída, R., Snow, G. R., Sommers, P., Sonntag, S., Sorokin, J., Squartini, R., Srivastava, Y. N., Stanca, D., Stanič, S., Stapleton, J., Stasielak, J., Stephan, M., Stutz, A., Suarez, F., Durán, M. Suarez, Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Taborda, O. A., Tapia, A., Tepe, A., Theodoro, V. M., Tibolla, O., Timmermans, C., Peixoto, C. J. Todero, Toma, G., Tomankova, L., Tomé, B., Tonachini, A., Elipe, G. Torralba, Machado, D. Torres, Travnicek, P., Trini, M., Ulrich, R., Unger, M., Urban, M., Galicia, J. F. Valdés, Valiño, I., Valore, L., van Aar, G., van Bodegom, P., Berg, A. M. van den, van Velzen, S., van Vliet, A., Varela, E., Cárdenas, B. Vargas, Varner, G., Vasquez, R., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Videla, M., Villaseñor, L., Vlcek, B., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weidenhaupt, K., Weindl, A., Welling, C., Werner, F., Widom, A., Wiencke, L., Wilczyński, H., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yang, L., Yapici, T., Yushkov, A., Zas, E., Zavrtanik, D., Zavrtanik, M., Zepeda, A., Zimmermann, B., Ziolkowski, M., and Zuccarello, F.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Joint contributions of the Pierre Auger Collaboration and the Telescope Array Collaboration to the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands., Comment: 3 proceedings, the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands; will appear in PoS(ICRC2015)
Published: 2015

19. Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment
Abstract: In this work we are reporting on the measurement of the proton-air inelastic cross section $\sigma^{\rm inel}_{\rm p-air}$ using the Telescope Array (TA) detector. Based on the measurement of the $\sigma^{\rm inel}_{\rm p-air}$ the proton-proton cross section $\sigma_{\rm p-p}$ value is also determined at $\sqrt{s} = 95_{-8}^{+5}$ TeV. Detecting cosmic ray events at ultra high energies with Telescope Array enables us to study this fundamental parameter that we are otherwise unable to access with particle accelerators. The data used in this report is the hybrid events observed by the Middle Drum fluorescence detector together with the surface array detector collected over five years. The value of the $\sigma^{\rm inel}_{\rm p-air}$ is found to be equal to $567.0 \pm 70.5 [{\rm Stat.}] ^{+29}_{-25} [{\rm Sys.}]$ mb. The total proton-proton cross section is subsequently inferred from Glauber Formalism and Block, Halzen and Stanev QCD inspired fit and is found to be equal to $170_{-44}^{+48} [{\rm Stat.}] _{-17}^{+19} [{\rm Sys.}] $mb.
Published: 2015
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20. Dirac equation for sphercially symmetric $AdS_5$ space-time and application to a boson star in EGB gravity

Author: Brihaye, Y., Delsate, T., Sawado, N., and Yoshii, H.
Subjects: General Relativity and Quantum Cosmology, High Energy Physics - Theory, Mathematical Physics
Abstract: We discuss the Dirac equation in a curved 5-dimensional spherically symmetric space-time. The angular part of the solutions is thoroughly studied, in a formulation suited for extending to rotating space-times with equal angular momenta. It has a symmetry $SU(2)\times U(1)$ and is implemented by the Wigner functions. The radial part forms a Dirac-Schr\"odinger type equation, and existence of the analytical solutions of the massless and the massive modes is confirmed. The solutions are described by the Jacobi polynomials. Also, the spinor of the both large and small components is obtained numerically. As a direct application of our formulation, we evaluate the spectrum of the Dirac fermion in Einstein-Gauss-Bonnet space-time and the space-time of a boson star., Comment: 15 pages, 5 figures
Published: 2014

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: Auger, The Pierre, Collaborations, Telescope Array, Aab, A., Abreu, P., Aglietta, M., Ahn, E. J., Samarai, I. Al, Albuquerque, I. F. M., Allekotte, I., Allen, J., Allison, P., Almela, A., Castillo, J. Alvarez, Alvarez-Muñiz, J., Batista, R. Alves, Ambrosio, M., Aminaei, A., Anchordoqui, L., Andringa, S., Aramo, C., Arqueros, F., Asorey, H., Assis, P., Aublin, J., Ave, M., Avenier, M., Avila, G., Badescu, A. M., Barber, K. B., Bäuml, J., Baus, C., Beatty, J. J., Becker, K. H., Bellido, J. A., Berat, C., Bertou, X., Biermann, P. L., Billoir, P., Blanco, M., Bleve, C., Blümer, H., Boháčová, M., Boncioli, D., Bonifazi, C., Bonino, R., Borodai, N., Brack, J., Brancus, I., Brogueira, P., Brown, W. C., Buchholz, P., Bueno, A., Buitink, S., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Candusso, M., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Chavez, A. G., Chiavassa, A., Chinellato, J. A., Chudoba, J., Cilmo, M., Clay, R. W., Cocciolo, G., Colalillo, R., Coleman, A., Collica, L., Coluccia, M. R., Conceição, R., Contreras, F., Cooper, M. J., Cordier, A., Coutu, S., Covault, C. E., Cronin, J., Curutiu, A., Dallier, R., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., De Domenico, M., de Jong, S. J., Neto, J. R. T. de Mello, De Mitri, I., de Oliveira, J., de Souza, V., del Peral, L., Deligny, O., Dembinski, H., Dhital, N., Di Giulio, C., Di Matteo, A., Diaz, J. C., Castro, M. L. Díaz, Diogo, F., Dobrigkeit, C., Docters, W., D'Olivo, J. C., Dorofeev, A., Hasankiadeh, Q. Dorosti, Dova, M. T., Ebr, J., Engel, R., Erdmann, M., Erfani, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Luis, P. Facal San, Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Ferguson, A. P., Fernandes, M., Fick, B., Figueira, J. M., Filevich, A., Filipčič, A., Fox, B. D., Fratu, O., Fröhlich, U., Fuchs, B., Fuji, T., Gaior, R., García, B., Roca, S. T. Garcia, Garcia-Gamez, D., Garcia-Pinto, D., Garilli, G., Bravo, A. Gascon, Gate, F., Gemmeke, H., Ghia, P. L., Giaccari, U., Giammarchi, M., Giller, M., Glaser, C., Glass, H., Berisso, M. Gómez, Vitale, P. F. Gómez, Gonçalves, P., Gonzalez, J. G., González, N., Gookin, B., Gorgi, A., Gorham, P., Gouffon, P., Grebe, S., Griffith, N., Grillo, A. F., Grubb, T. D., Guardincerri, Y., Guarino, F., Guedes, G. P., Hampel, M. R., Hansen, P., Harari, D., Harrison, T. A., Hartmann, S., Harton, J. L., Haungs, A., Hebbeker, T., Heck, D., Heimann, P., Herve, A. E., Hill, G. C., Hojvat, C., Hollon, N., Holt, E., Homola, P., Hörandel, J. R., Horvath, P., Hrabovský, M., Huber, D., Huege, T., Insolia, A., Isar, P. G., Islo, K., Jandt, I., Jansen, S., Jarne, C., Josebachuili, M., Kääpä, A., Kambeitz, O., Kampert, K. H., Kasper, P., Katkov, I., Kégl, B., Keilhauer, B., Keivani, A., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Krause, R., Krohm, N., Krömer, O., Kruppke-Hansen, D., Kuempel, D., Kunka, N., La Rosa, G., LaHurd, D., Latronico, L., Lauer, R., Lauscher, M., Lautridou, P., Coz, S. Le, Leão, M. S. A. B., Lebrun, D., Lebrun, P., de Oliveira, M. A. Leigui, Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., López, R., Agüera, A. Lopez, Louedec, K., Bahilo, J. Lozano, Lu, L., Lucero, A., Ludwig, M., Maccarone, M. C., Malacari, M., Maldera, S., Mallamaci, M., Maller, J., Mandat, D., Mantsch, P., Mariazzi, A. G., Marin, V., Mariş, I. C., Marsella, G., Martello, D., Martin, L., Martinez, H., Bravo, O. Martínez, Martraire, D., Meza, J. J. Masías, Mathes, H. J., Mathys, S., Matthews, J. A. J., Matthews, J., Matthiae, G., Maurel, D., Maurizio, D., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melissas, M., Melo, D., Menichetti, E., Menshikov, A., Messina, S., Meyhandan, R., Mićanović, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Molina-Bueno, L., Mollerach, S., Monasor, M., Ragaigne, D. Monnier, Montanet, F., Morello, C., Mostafá, M., Moura, C. A., Muller, M. A., Müller, G., Münchmeyer, M., Mussa, R., Navarra, G., Navas, S., Necesal, P., Nellen, L., Nelles, A., Neuser, J., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novotny, V., Nožka, L., Ochilo, L., Olinto, A., Oliveira, M., Pacheco, N., Selmi-Dei, D. Pakk, Palatka, M., Pallotta, J., Palmieri, N., Papenbreer, P., Parente, G., Parra, A., Paul, T., Pech, M., Pekala, J., Pelayo, R., Pepe, I. M., Perrone, L., Pesce, R., Petermann, E., Peters, C., Petrera, S., Petrolini, A., Petrov, Y., Phuntsok, J., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Porcelli, A., Porowski, C., Prado, R. R., Privitera, P., Prouza, M., Purrello, V., Quel, E. J., Querchfeld, S., Quinn, S., Rautenberg, J., Ravel, O., Ravignani, D., Revenu, B., Ridky, J., Riggi, S., Risse, M., Ristori, P., Rizi, V., Roberts, J., de Carvalho, W. Rodrigues, Cabo, I. Rodriguez, Fernandez, G. Rodriguez, Rojo, J. Rodriguez, Rodríguez-Frías, M. D., Ros, G., Rosado, J., Rossler, T., Roth, M., Roulet, E., Rovero, A. C., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Saleh, A., Greus, F. Salesa, Salina, G., Sánchez, F., Sanchez-Lucas, P., Santo, C. E., Santos, E., Santos, E. M., Sarazin, F., Sarkar, B., Sarmento, R., Sato, R., Scharf, N., Scherini, V., Schieler, H., Schiffer, P., Scholten, O., Schoorlemmer, H., Schovánek, P., Schulz, A., Schulz, J., Schumacher, J., Sciutto, S. J., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sidelnik, I., Sigl, G., Sima, O., Śmiał, A., Šmída, R., Snow, G. R., Sommers, P., Sorokin, J., Squartini, R., Srivastava, Y. N., Stanič, S., Stapleton, J., Stasielak, J., Stephan, M., Stutz, A., Suarez, F., Suomijärvi, T., Supanitsky, A. D., Sutherland, M. S., Swain, J., Szadkowski, Z., Szuba, M., Taborda, O. A., Tapia, A., Tartare, M., Theodoro, V. M., Timmermans, C., Peixoto, C. J. Todero, Toma, G., Tomankova, L., Tomé, B., Tonachini, A., Elipe, G. Torralba, Machado, D. Torres, Travnicek, P., Trovato, E., Tueros, M., Ulrich, R., Unger, M., Urban, M., Galicia, J. F. Valdés, Valiño, I., Valore, L., van Aar, G., Berg, A. M. van den, van Velzen, S., van Vliet, A., Varela, E., Cárdenas, B. Vargas, Varner, G., Vázquez, J. R., Vázquez, R. A., Veberič, D., Verzi, V., Vicha, J., Videla, M., Villaseñor, L., Vlcek, B., Vorobiov, S., Wahlberg, H., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weidenhaupt, K., Weindl, A., Werner, F., Widom, A., Wiencke, L., Wilczyńska, B., Wilczyński, H., Will, M., Williams, C., Winchen, T., Wittkowski, D., Wundheiler, B., Wykes, S., Yamamoto, T., Yapici, T., Younk, P., Yuan, G., Yushkov, A., Zamorano, B., Zas, E., Zavrtanik, D., Zavrtanik, M., Zaw, I., Zepeda, A., Zhou, J., Zhu, Y., Silva, M. Zimbres, Ziolkowski, M., Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
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 $10^{19}$ 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 $10^{19}$ 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., Comment: 33 pages, 13 figures, to appear in The Astrophysical Journal
Published: 2014
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22. A Northern Sky Survey for Point-Like Sources of EeV Neutral Particles with the Telescope Array Experiment

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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., Comment: 27 pages, 10 figures, 3 tables, accepted for publication in the Astrophysical Journal
Published: 2014
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23. Indications of Intermediate-Scale Anisotropy of Cosmic Rays with Energy Greater Than 57 EeV in the Northern Sky Measured with the Surface Detector of the Telescope Array Experiment

Author: The Telescope Array Collaboration, Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We have searched for intermediate-scale anisotropy in the arrival directions of ultrahigh-energy cosmic rays with energies above 57~EeV in the northern sky using data collected over a 5 year period by the surface detector of the Telescope Array experiment. We report on a cluster of events that we call the hotspot, found by oversampling using 20$^\circ$-radius circles. The hotspot has a Li-Ma statistical significance of 5.1$\sigma$, and is centered at R.A.=146.7$^{\circ}$, Dec.=43.2$^{\circ}$. The position of the hotspot is about 19$^{\circ}$ off of the supergalactic plane. The probability of a cluster of events of 5.1$\sigma$ significance, appearing by chance in an isotropic cosmic-ray sky, is estimated to be 3.7$\times$10$^{-4}$ (3.4$\sigma$)., Comment: 16 pages, 3 figures, accepted for publication in the ApJ Letters
Published: 2014
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24. Search for Ultra-High-Energy Neutrinos with the Telescope Array Surface Detector

Author: Abbasi, R. U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fujiwara, R., Fukushima, M., Furlich, G., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H. M., Jeong, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kim, J. H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y. J., Lee, K. H., Lubsandorzhiev, B., Lundquist, J. P., Machida, K., Martens, K., Matsuyama, T., Matthews, J. N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakai, K., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Remington, J., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sako, T., Sakurai, N., Scott, L. M., Seki, T., Sekino, K., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, H. S., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Tanoue, Y., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yada, K., Yamamoto, M., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoshii, H., Zhezher, Y., and Zundel, Z.
Published: 2020
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25. Pierre Auger Observatory and Telescope Array: Joint Contributions to the 33rd International Cosmic Ray Conference (ICRC 2013)

Author: Array, The Telescope, Collaborations, Pierre Auger, Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W, Bergman, D. R., Blake, S. A., Cady, R., Chae, M. J., Cheon, B. G., Chiba, J., Chikawa, M., Cho, W. R., Fujii, T., Fukushima, M., Goto, K., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H. B., Kim, J. H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y. J., Lan, J., Lundquist, J. P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J. N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nanpei, H., Nonaka, T., Nozato, A., Ogio, S., Oh, S., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shirahama, T., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Takamura, M., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wada, Y., Wong, T., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., Zundel, Z., Aab, A., Abreu, P., Aglietta, M., Ahlers, M., Ahn, E. J., Albuquerque, I. F. M., Allekotte, I., Allen, J., Allison, P., Almela, A., Castillo, J. Alvarez, Alvarez-Muniz, J., Batista, R. Alves, Ambrosio, M., Aminaei, A., Anchordoqui, L., Andringa, S., Antivcic, T., Aramo, C., Arqueros, F., Asorey, H., Assis, P., Aublin, J., Ave, M., Avenier, M., Avila, G., Badescu, A. M., Barber, K. B., Bardenet, R., Baeuml, J., Baus, C., Beatty, J. J., Becker, K. H., Belletoile, A., Bellido, J. A., BenZvi, S., Berat, C., Bertou, X., Biermann, P. L., Billoir, P., Blanco, F., Blanco, M., Bleve, C., Blumer, H., Bohacova, M., Boncioli, D., Bonifazi, C., Bonino, R., Borodai, N., Brack, J., Brancus, I., Brogueira, P., Brown, W. C., Buchholz, P., Bueno, A., Burton, R. E., Buscemi, M., Caballero-Mora, K. S., Caccianiga, B., Caccianiga, L., Candusso, M., Caramete, L., Caruso, R., Castellina, A., Cataldi, G., Cazon, L., Cester, R., Cheng, S. H., Chiavassa, A., Chinellato, J. A., Chudoba, J., Cilmo, M., Clay, R. W., Cocciolo, G., Colalillo, R., Collica, L., Coluccia, M. R., Conceicao, R., Contreras, F., Cook, H., Cooper, M. J., Coutu, S., Covault, C. E., Criss, A., Cronin, J., Curutiu, A., Dallier, R., Daniel, B., Dasso, S., Daumiller, K., Dawson, B. R., de Almeida, R. M., De Domenico, M., de Jong, S. J., De La Vega, G., Junior, W. J. M. de Mello, Neto, J. R. T. de Mello, De Mitri, I., de Souza, V., de Vries, K. D., del Peral, L., Deligny, O., Dembinski, H., Dhital, N., Di Giulio, C., Diaz, J. C., Castro, M. L. Diaz, Diep, P. N., Diogo, F., Dobrigkeit, C., Docters, W., D'Olivo, J. C., Dong, P. N., Dorofeev, A., Anjos, J. C. dos, Dova, M. T., Ebr, J., Engel, R., Erdmann, M., Escobar, C. O., Espadanal, J., Etchegoyen, A., Luis, P. Facal San, Falcke, H., Fang, K., Farrar, G., Fauth, A. C., Fazzini, N., Ferguson, A. P., Fick, B., Figueira, J. M., Filevich, A., Filipcic, A., Foerster, N., Fox, B. D., Fracchiolla, C. E., Fraenkel, E. D., Fratu, O., Frohlich, U., Fuchs, B., Gaior, R., Gamarra, R. F., Gambetta, S., Garcia, B., Roca, S. T. Garcia, Garcia-Gamez, D., Garcia-Pinto, D., Garilli, G., Bravo, A. Gascon, Gemmeke, H., Ghia, P. L., Giller, M., Gitto, J., Glaser, C., Glass, H., Albarracin, F. Gomez, Berisso, M. Gomez, Vitale, P. F. Gomez, Goncalves, P., Gonzalez, J. G., Gookin, B., Gorgi, A., Gorham, P., Gouffon, P., Grebe, S., Griffith, N., Grillo, A. F., Grubb, T. D., Guardincerri, Y., Guarino, F., Guedes, G. P., Hansen, P., Harari, D., Harrison, T. A., Harton, J. L., Haungs, A., Hebbeker, T., Heck, D., Herve, A. E., Hill, G. C., Hojvat, C., Hollon, N., Homola, P., Hoerandel, J. R., Horvath, P., Hrabovsky, M., Huber, D., Huege, T., Insolia, A., Isar, P. G., Jansen, S., Jarne, C., Josebachuili, M., Kadija, K., Kambeitz, O., Kampert, K. H., Karhan, P., Kasper, P., Katkov, I., Kegl, B., Keilhauer, B., Keivani, A., Kemp, E., Kieckhafer, R. M., Klages, H. O., Kleifges, M., Kleinfeller, J., Knapp, J., Krause, R., Krohm, N., Kroemer, O., Kruppke-Hansen, D., Kuempel, D., Kunka, N., La Rosa, G., LaHurd, D., Latronico, L., Lauer, R., Lauscher, M., Lautridou, P., Coz, S. Le, Leao, M. S. A. B., Lebrun, D., Lebrun, P., de Oliveira, M. A. Leigui, Letessier-Selvon, A., Lhenry-Yvon, I., Link, K., Lopez, R., Aguera, A. Lopez, Louedec, K., Bahilo, J. Lozano, Lu, L., Lucero, A., Ludwig, M., Lyberis, H., Maccarone, M. C., Macolino, C., Malacari, M., Maldera, S., Maller, J., Mandat, D., Mantsch, P., Mariazzi, A. G., Marin, V., Maris, I. C., Falcon, H. R. Marquez, Marsella, G., Martello, D., Martin, L., Martinez, H., Bravo, O. Martinez, Martraire, D., Meza, J. J. Masias, Mathes, H. J., Matthews, J., Matthews, J. A. J., Matthiae, G., Maurel, D., Maurizio, D., Mayotte, E., Mazur, P. O., Medina, C., Medina-Tanco, G., Melissas, M., Melo, D., Menichetti, E., Menshikov, A., Messina, S., Meyhandan, R., Micanovic, S., Micheletti, M. I., Middendorf, L., Minaya, I. A., Miramonti, L., Mitrica, B., Molina-Bueno, L., Mollerach, S., Monasor, M., Ragaigne, D. Monnier, Montanet, F., Morales, B., Morello, C., Moreno, J. C., Mostafa, M., Moura, C. A., Muller, M. A., Muller, G., Munchmeyer, M., Mussa, R., Navarra, G., Navarro, J. L., Navas, S., Necesal, P., Nellen, L., Nelles, A., Neuser, J., Nhung, P. T., Niechciol, M., Niemietz, L., Niggemann, T., Nitz, D., Nosek, D., Novzka, L., Oehlschlager, J., Olinto, A., Oliveira, M., Ortiz, M., Pacheco, N., Selmi-Dei, D. Pakk, Palatka, M., Pallotta, J., Palmieri, N., Parente, G., Parra, A., Pastor, S., Paul, T., Pech, M., Pekala, J., Pelayo, R., Pepe, I. M., Perrone, L., Pesce, R., Petermann, E., Petrera, S., Petrolini, A., Petrov, Y., Piegaia, R., Pierog, T., Pieroni, P., Pimenta, M., Pirronello, V., Platino, M., Plum, M., Pontz, M., Porcelli, A., Preda, T., Privitera, P., Prouza, M., Quel, E. J., Querchfeld, S., Quinn, S., Rautenberg, J., Ravel, O., Ravignani, D., Revenu, B., Ridky, J., Riggi, S., Risse, M., Ristori, P., Rivera, H., Rizi, V., Roberts, J., de Carvalho, W. Rodrigues, Cabo, I. Rodriguez, Fernandez, G. Rodriguez, Martino, J. Rodriguez, Rojo, J. Rodriguez, Rodriguez-Frias, M. D., Ros, G., Rosado, J., Rossler, T., Roth, M., Rouille-d'Orfeuil, B., Roulet, E., Rovero, A. C., Ruhle, C., Saffi, S. J., Saftoiu, A., Salamida, F., Salazar, H., Greus, F. Salesa, Salina, G., Sanchez, F., Sanchez-Lucas, P., Santo, C. E., Santos, E., Santos, E. M., Sarazin, F., Sarkar, B., Sato, R., Scharf, N., Scherini, V., Schieler, H., Schiffer, P., Schmidt, A., Scholten, O., Schoorlemmer, H., Schovanek, P., Schroeder, F. G., Schulz, A., Schulz, J., Sciutto, S. J., Scuderi, M., Segreto, A., Settimo, M., Shadkam, A., Shellard, R. C., Sidelnik, I., Sigl, G., Sima, O., Smialkowski, A., Smida, R., Snow, G. R., Sommers, P., Sorokin, J., Spinka, H., Squartini, R., Srivastava, Y. N., Stanic, S., Stapleton, J., Stasielak, J., Stephan, M., Straub, M., Stutz, A., Suarez, F., Suomijarvi, T., Supanitsky, A. D., Susa, T., Sutherland, M. S., Swain, J., Szadkowski, Z., Szuba, M., Tapia, A., Tartare, M., Tacscuau, O., Tcaciuc, R., Thao, N. T., Tiffenberg, J., Timmermans, C., Tkaczyk, W., Peixoto, C. J. Todero, Toma, G., Tomankova, L., Tome, B., Tonachini, A., Elipe, G. Torralba, Machado, D. Torres, Travnicek, P., Tridapalli, D. B., Trovato, E., Tueros, M., Ulrich, R., Unger, M., Galicia, J. F. Valdes, Valino, I., Valore, L., van Aar, G., Berg, A. M. van den, van Velzen, S., van Vliet, A., Varela, E., Cardenas, B. Vargas, Varner, G., Vazquez, J. R., Vazquez, R. A., Veberic, D., Verzi, V., Vicha, J., Videla, M., Villasenor, L., Wahlberg, H., Wahrlich, P., Wainberg, O., Walz, D., Watson, A. A., Weber, M., Weidenhaupt, K., Weindl, A., Werner, F., Westerhoff, S., Whelan, B. J., Widom, A., Wieczorek, G., Wiencke, L., Wilczynska, B., Wilczynski, H., Will, M., Williams, C., Winchen, T., Wundheiler, B., Wykes, S., Yamamoto, T., Yapici, T., Younk, P., Yuan, G., Yushkov, A., Zamorano, B., Zas, E., Zavrtanik, D., Zavrtanik, M., Zaw, I., Zepeda, A., Zhou, J., Zhu, Y., Silva, M. Zimbres, and Ziolkowski, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Joint contributions of the Pierre Auger and Telescope Array Collaborations to the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil, July 2013: cross-calibration of the fluorescence telescopes, large scale anisotropies and mass composition., Comment: Joint contributions of the Pierre Auger and Telescope Array Collaborations to the 33rd International Cosmic Ray Conference, Rio de Janeiro, Brazil, July 2013
Published: 2013

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

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

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, S., Martens, K., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Minamino, M., Miyata, K., Murano, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Roh, S. Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Urban, F., Vasiloff, G., Wada, Y., Wong, T., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zhou, X., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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., Comment: 28 pages, 12 figures, submitted to Astroparticle Physics
Published: 2013

28. The Energy Spectrum of Ultra-High-Energy Cosmic Rays Measured by the Telescope Array FADC Fluorescence Detectors in Monocular Mode

Author: The Telescope Array Collaboration, Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Lundquist, J. P., Machida, S., Martens, K., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Myers, I., Minamino, M., Miyata, K., Murano, Y., Nagataki, S., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Roh, S. Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Sonley, T. J., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
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 (Abu-Zayyad {\it et al.}, {Astropart. Phys.} 39 (2012), 109). This combined spectrum corroborates the recently published Telescope Array surface detector spectrum (Abu-Zayyad {\it et al.}, {Astrophys. Journ.} 768 (2013), L1) with independent systematic uncertainties., Comment: 10 pages, 10 figures, submitted to Astroparticle Physics
Published: 2013

29. Upper limit on the flux of photons with energies above 10^19 eV using the Telescope Array surface detector

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Gorbunov, D., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Machida, S., Martens, K., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Minamino, M., Miyata, K., Murano, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Roh, S. Y., Rubtsov, G. I., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Wood, M., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zhou, X., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract: We search for ultra-high energy photons by analyzing geometrical properties of shower fronts of events registered by the Telescope Array surface detector. By making use of an event-by-event statistical method, we derive upper limits on the absolute flux of primary photons with energies above 10^19, 10^19.5 and 10^20 eV based on the first three years of data taken., Comment: 7 pages, 5 figures
Published: 2013
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30. Constraints on the diffuse photon flux with energies above 1018 eV using the surface detector of the Telescope Array experiment

Author: Abbasi, R.U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Cheon, B.G., Chiba, J., Chikawa, M., di Matteo, A., Fujii, T., Fujita, K., Fukushima, M., Furlich, G., Goto, T., Hanlon, W., Hayashi, M., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jeong, H.M., Jeong, S., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kuznetsov, M., Kwon, Y.J., Lee, K.H., Lubsandorzhiev, B., Lundquist, J.P., Machida, K., Martens, K., Matsuyama, T., Matthews, J.N., Mayta, R., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, R., Nakamura, T., Nonaka, T., Oda, H., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Okuda, T., Omura, Y., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I.H., Piskunov, M.S., Pshirkov, M.S., Remington, J., Rodriguez, D.C., Rubtsov, G.I., Ryu, D., Sagawa, H., Sahara, R., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L.M., Seki, T., Sekino, K., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Shin, H.S., Smith, J.D., Sokolsky, P., Stokes, B.T., Stratton, S.R., Stroman, T.A., Suzawa, T., Takagi, Y., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamamoto, M., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zhezher, Y., and Zundel, Z.
Published: 2019
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31. Observation of new microsecond isomers among fission products of 345 MeV/nucleon 238U

Author: Kameda, D., Kubo, T., Ohnishi, T., Kusaka, K., Yoshida, A., Yoshida, K., Ohtake, M., Fukuda, N., Takeda, H., Tanaka, K., Inabe, N., Yanagisawa, Y., Gono, Y., Watanabe, H., Otsu, H., Baba, H., Ichihara, T., Yamaguchi, Y., Takechi, M., Nishimura, S., Ueno, H., Yoshimi, A., Sakurai, H., Motobayashi, T., Nakao, T., Mizoi, Y., Matsushita, M., Ieki, K., Kobayashi, N., Kawada, Y., Tanaka, N., Deguchi, S., Satou, Y., Kondo, Y., Nakamura, T., Yoshinaga, K., Ishii, C., Yoshii, H., Miyashita, Y., Uematsu, N., Shiraki, Y., Sumikama, T., Chiba, J., Ideguchi, E., Saito, A., Yamaguchi, T., Hachiuma, I., Suzuki, T., Moriguchi, T., Ozawa, A., Ohtsubo, T., Famiano, M. A., Geissel, H., Nettleton, A. S., Tarasov, O. B., Bazin, D., Sherrill, B. M., Manikonda, S. L., and Nolen, J. A.
Subjects: Nuclear Experiment
Abstract: A search for isomeric gamma-decays among fission fragments from 345 MeV/nucleon 238U has been performed at the RIKEN Nishina Center RI Beam Factory. Fission fragments were selected and identified using the superconducting in-flight separator BigRIPS and were implanted in an aluminum stopper. Delayed gamma-rays were detected using three clover-type high-purity germanium detectors located at the focal plane within a time window of 20 microseconds following the implantation. We identified a total of 54 microsecond isomers with half-lives of ~0.1 - 10 microseconds, including discovery of 18 new isomers in very neutron-rich nuclei: 59Tim, 90Asm, 92Sem, 93Sem, 94Brm, 95Brm, 96Brm, 97Rbm, 108Nbm, 109Mom, 117Rum, 119Rum, 120Rhm, 122Rhm, 121Pdm, 124Pdm, 124Agm and 126Agm, and obtained a wealth of spectroscopic information such as half-lives, gamma-ray energies, gamma-ray relative intensities and gamma-gamma coincidences over a wide range of neutron-rich exotic nuclei. Proposed level schemes are presented for 59Tim, 82Gam, 92Brm, 94Brm, 95Brm, 97Rbm, 98Rbm, 108Nbm, 108Zrm, 109Mom, 117Rum, 119Rum, 120Rhm, 122Rhm, 121Pdm, 124Agm and 125Agm, based on the obtained spectroscopic information and the systematics in neighboring nuclei. Nature of the nuclear isomerism is discussed in relation to evolution of nuclear structure.
Published: 2012
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32. Search for Anisotropy of Ultra-High Energy Cosmic Rays with the Telescope Array Experiment

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lim, S. I., Machida, S., Martens, K., Martineau, J., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Minamino, M., Miyata, K., Murano, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Roh, S. Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Sonley, T. J., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Wood, M., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zhou, X., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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., Comment: 10 pages, 9 figures
Published: 2012
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33. The Cosmic Ray Energy Spectrum Observed with the Surface Detector of the Telescope Array Experiment

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lan, J., Lim, S. I., Machida, S., Martens, K., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Minamino, M., Miyata, K., Murano, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D. C., Roh, S. Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Wood, M., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zhou, X., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
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: 2012
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34. The Energy Spectrum of Telescope Array's Middle Drum Detector and the Direct Comparison to the High Resolution Fly's Eye Experiment

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

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Chikawa, M., Cho, E. J., Cho, W. R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Gorbunov, D., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lim, S. I., Machida, S., Martens, K., Martineau, J., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J. N., Myers, I., Minamino, M., Miyata, K., Miyauchi, H., Murano, Y., Nakamura, T., Nam, S. W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Oshima, A., Ozawa, S., Park, I. H., Pshirkov, M. S., Rodriguez, D., Roh, S. Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Sonley, T. J., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T. A., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S. B., Thomson, G. B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Wood, M., Yamakawa, Y., Yamaoka, H., Yamazaki, K., Yang, J., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: The Telescope Array (TA) experiment, located in the western desert of Utah,USA, is designed for 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., Comment: 32 pages, 17 figures
Published: 2012
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36. New air fluorescence detectors employed in the Telescope Array experiment

Author: Tokuno, H., Tameda, Y., Takeda, M., Kadota, K., Ikeda, D., Chikawa, M., Fujii, T., Fukushima, M., Honda, K., Inoue, N., Kakimoto, F., Kawana, S., Kido, E., Matthews, J. N., Nonaka, T., Ogio, S., Okuda, T., Ozawa, S., Sagawa, H., Sakurai, N., Shibata, T., Taketa, A., Thomas, S. B., Tomida, T., Tsunesada, Y., Udo, S., Abu-zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J. W., Bergman, D. R., Blake, S. A., Cady, R., Cheon, B. G., Chiba, J., Cho, E. J., Cho, W. R., Fujii, H., Fukuda, T., Gorbunov, D., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Iguchi, T., Ikuta, K., Ishii, T., Ishimori, R., Ivanov, D., Iwamoto, S., Jui, C. C. H., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kim, H. B., Kim, H. K., Kim, J. H., Kitamoto, K., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y. J., Lim, S. I., Machida, S., Martens, K., Martineau, J., Matsuda, T., Matsuura, T., Matsuyama, T., Myers, I., Minamino, M., Miyata, K., Miyauchi, H., Murano, Y., Nakamura, T., Nam, S. W., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Oshima, A., Park, I. H., Pshirkov, M. S., Rodriguez, D., Roh, S. Y., Rubtsov, G., Ryu, D., Sampson, A. L., Scott, L. M., Shah, P. D., Shibata, F., Shimodaira, H., Shin, B. K., Shin, J. I., Shirahama, T., Smith, J. D., Sokolsky, P., Sonley, T. J., Springer, R. W., Stokes, B. T., Stratton, S. R., Stroman, T., Suzuki, S., Takahashi, Y., Takita, M., Tanaka, H., Tanaka, K., Tanaka, M., Thomson, G. B., Tinyakov, P., Tkachev, I., Troitsky, S., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Ukai, H., Vasiloff, G., Wada, Y., Wong, T., Wood, M., Yamakawa, Y., Yamaoka, H., Yamazaki, K., Yang, J., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Since 2007, the Telescope Array (TA) experiment, based in Utah, USA, has been observing ultra high energy cosmic rays to understand their origins. The experiment involves a surface detector (SD) array and three fluorescence detector (FD) stations. FD stations, installed surrounding the SD array, measure the air fluorescence light emitted from extensive air showers (EASs) for precise determination of their energies and species. The detectors employed at one of the three FD stations were relocated from the High Resolution Fly's Eye experiment. At the other two stations, newly designed detectors were constructed for the TA experiment. An FD consists of a primary mirror and a camera equipped with photomultiplier tubes. To obtain the EAS parameters with high accuracies, understanding the FD optical characteristics is important. In this paper, we report the characteristics and installation of new FDs and the performances of the FD components. The results of the monitored mirror reflectance during the observation time are also described in this report., Comment: 44 pages, 23 figures, submitted to NIM-A
Published: 2011
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37. Combined effects of peanut oil and glycerol on whey protein-based edible film in extending fresh chicken meat shelf life.

Author: Putri, T. R., Febiyanti, E., Paramita, V., Yulianto, M. E., Yoshii, H., and Ariyanto, H. D.
Subjects: CHICKEN as food, EDIBLE coatings, WHEY, MEAT storage, PEANUT oil, WHEY proteins, GLYCERIN
Abstract: The present work aimed to develop a new antibacterial composite edible film of whey protein-based containing peanut oil (PO). Different concentrations of PO (0, 2, and 4% wt.), glycerol (Gly) (10, 15, and 20% wt.), and Tween 80 (2% wt.) were used as ingredients. The used of PO as antibacterial compound in the edible film was applied on fresh chicken meat during storage time at room temperature (25°C) and refrigerated temperature (-5°C) for 10 d. The characteristics of edible film, texture, and TPC on chicken meat were evaluated. Based on the results, the incorporation of Gly to the film increased the moisture content, while the incorporation of PO to the film decreased the moisture content, and slightly increased the thickness. The antibacterial effect of the composite film increased linearly with increasing PO concentration. The shelf life of chicken meat for film containing 4% wt. PO was the best during chilled temperature storage for 10 d. [ABSTRACT FROM AUTHOR]
Published: 2024
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38. Energy determination in the Akeno Giant Air Shower Array experiment

Author: Takeda, M., Sakaki, N., Honda, K., Chikawa, M., Fukushima, M., Hayashida, N., Inoue, N., Kadota, K., Kakimoto, F., Kamata, K., Kawaguchi, S., Kawakami, S., Kawasaki, Y., Kawasumi, N., Mahrous, A. M., Mase, K., Mizobuchi, S., Morizane, Y., Nagano, M., Ohoka, H., Osone, S., Sasaki, M., Sasano, M., Shimizu, H. M., Shinozaki, K., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., and Yoshii, H.
Subjects: Astrophysics
Abstract: Using data from more than ten-years of observations with the Akeno Giant Air Shower Array (AGASA), we published a result that the energy spectrum of ultra-high energy cosmic rays extends beyond the cutoff energy predicted by Greisen, and Zatsepin and Kuzmin. In this paper, we reevaluate the energy determination method used for AGASA events with respect to the lateral distribution of shower particles, their attenuation with zenith angle, shower front structure, delayed particles observed far from the core and other factors. The currently assigned energies of AGASA events have an accuracy of $\pm$25% in event-reconstruction resolution and $\pm$18% in systematic errors around 10$^{20}$eV. This systematic uncertainty is independent of primary energy above 10$^{19}$eV. Based on the energy spectrum from 10$^{14.5}$eV to a few times 10$^{20}$eV determined at Akeno, there are surely events above 10$^{20}$eV and the energy spectrum extends up to a few times 10$^{20}$eV without a GZK-cutoff., Comment: accepted to Astroparticle Physics, 29pages, 17+1 figures, elsart.cls The AGASA exposure is 5.1x10^16 m2 sr s until July 2002
Published: 2002
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39. Updated AGASA event list above 4x10^19eV

Author: Hayashida, N., Honda, K., Inoue, N., Kadota, K., Kakimoto, F., Kakizawa, S., Kamata, K., Kawaguchi, S., Kawasaki, Y., Kawasumi, N., Kusano, E., Mahrous, A. M., Mase, K., Minagawa, T., Nagano, M., Nishikawa, D., Ohoka, H., Osone, S., Sakaki, N., Sasaki, M., Shinozaki, K., Takeda, M., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., and Yoshii, H.
Subjects: Astrophysics
Abstract: After our Ap.J. publication of the Akeno Giant Air Shower Array (AGASA) results in 1999 (Takeda et al., 1999), we observed nine events with energies above 4 $\times$ 10$^{19}$eV until May 2000. This short report lists the coordinates of these events, and shows the updated energy spectrum and arrival direction map. The analysis was carried out with the same procedure employed in the Ap.J. publication., Comment: 6 pages, 2 figures, appendix for ApJ 522(1999) 225
Published: 2000

40. The Anisotropy of Cosmic Ray Arrival Direction around 10^18eV

Author: Hayashida, N., Honda, K., Inoue, N., Kadota, K., Kakimoto, F., Kakizawa, S., Kamata, K., Kawaguchi, S., Kawasaki, Y., Kawasumi, N., Kusano, E., Matsubara, Y., Mase, K., Minagawa, T., Murakami, K., Nagano, M., Nishikawa, D., Ohoka, H., Osone, S., Sakaki, N., Sasaki, M., Sasano, M., Shinozaki, K., Takeda, M., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., Yoshii, H., and Collaboration, The AGASA
Subjects: Astrophysics
Abstract: Anisotropy in the arrival directions of cosmic rays around 10^{18}eV is studied using data from the Akeno 20 km^2 array and the Akeno Giant Air Shower Array (AGASA), using a total of about 216,000 showers observed over 15 years above 10^{17}eV. In the first harmonic analysis, we have found significant anisotropy of $\sim$ 4 % around 10^{18}eV, corresponding to a chance probability of $\sim 10^{-5}$ after taking the number of independent trials into account. With two dimensional analysis in right ascension and declination, this anisotropy is interpreted as an excess of showers near the directions of the Galactic Center and the Cygnus region. This is a clear evidence for the existence of the galactic cosmic ray up to the energy of 10^{18}eV. Primary particle which contribute this anisotropy may be proton or neutron., Comment: 4pages, three figures, to appear in Procedings of 26th ICRC(Salt Lake City)
Published: 1999
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41. Small-scale anisotropy of cosmic rays above 10^19eV observed with the Akeno Giant Air Shower Array

Author: Takeda, M., Hayashida, N., Honda, K., Inoue, N., Kadota, K., Kakimoto, F., Kamata, K., Kawaguchi, S., Kawasaki, Y., Kawasumi, N., Kusano, E., Matsubara, Y., Murakami, K., Nagano, M., Nishikawa, D., Ohoka, H., Osone, S., Sakaki, N., Sasaki, M., Shinozaki, K., Souma, N., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., and Yoshii, H.
Subjects: Astrophysics
Abstract: With the Akeno Giant Air Shower Array (AGASA), 581 cosmic rays above 10^19eV, 47 above 4 x 10^19eV, and 7 above 10^20eV are observed until August 1998. Arrival direction distribution of these extremely high energy cosmic rays has been studied. While no significant large-scale anisotropy is found on the celestial sphere, some interesting clusters of cosmic rays are observed. Above 4 x 10^19eV, there are one triplet and three doublets within separation angle of 2.5^o and the probability of observing these clusters by a chance coincidence under an isotropic distribution is smaller than 1 %. Especially the triplet is observed against expected 0.05 events. The cos(\theta_GC) distribution expected from the Dark Matter Halo model fits the data as well as an isotropic distribution above 2 x 10^19eV and 4 x 10^19eV, but is a poorer fit than isotropy above 10^19eV. Arrival direction distribution of seven 10^20eV cosmic rays is consistent with that of lower energy cosmic rays and is uniform. Three of seven are members of doublets above about 4 x 10^19eV., Comment: 40 pages, 12 figure, AASTeX *** Authors found a typo on Table 2 -- Energy of event 94/07/06 ***
Published: 1999
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42. Extension of the Cosmic-Ray Energy Spectrum Beyond the Predicted Greisen-Zatsepin-Kuz'min Cutoff

Author: Takeda, M., Hayashida, N., Honda, K., Inoue, N., Kadota, K., Kakimoto, F., Kamata, K., Kawaguchi, S., Kawasaki, Y., Kawasumi, N., Kitamura, H., Kusano, E., Matsubara, Y., Murakami, K., Nagano, M., Nishikawa, D., Ohoka, H., Sakaki, N., Sasaki, M., Shinozaki, K., Souma, N., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., and Yoshii, H.
Subjects: Astrophysics
Abstract: The cosmic-ray energy spectrum above 10^{18.5} eV is reported using the updated data set of the Akeno Giant Air Shower Array (AGASA) from February 1990 to October 1997. The energy spectrum extends beyond 10^{20} eV and the energy gap between the highest energy event and the others is being filled up with recently observed events. The spectral shape suggests the absence of the 2.7 K cutoff in the energy spectrum or a possible presence of a new component beyond the 2.7 K cutoff., Comment: to be published in PRL, 3 figures, REVTEX format
Published: 1998
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43. The Anisotropy of Cosmic Ray Arrival Directions around 10$^{18}$eV

Author: AGASA Collaboration, Hayashida, N., Honda, K., Inoue, N., Kadota, K., Kakimoto, F., Kamata, K., Kawaguchi, S., Kawasaki, Y., Kawasumi, N., Kitamura, H., Kusano, E., Matsubara, Y., Murakami, K., Nagano, M., Nishikawa, D., Ohoka, H., Sakaki, N., Sasaki, M., Shinozaki, K., Souma, N., Takeda, M., Teshima, M., Torii, R., Tsushima, I., Uchihori, Y., Yamamoto, T., Yoshida, S., and Yoshii, H.
Subjects: Astrophysics
Abstract: Anisotropy in the arrival directions of cosmic rays with energies above 10$^{17}$eV is studied using data from the Akeno 20 km$^2$ array and the Akeno Giant Air Shower Array (AGASA), using a total of about 117,000 showers observed during 11 years. In the first harmonic analysis, we have found strong anisotropy of $\sim$ 4% around 10$^{18}$eV, corresponding to a chance probability of 0.2%. With two dimensional analysis in right ascension and declination, this anisotropy is interpreted as an excess of showers near the directions of the Galactic Center and the Cygnus region., Comment: 17 pages with 16 figures, http://www.icrr.u-tokyo.ac.jp/~erina/English.html
Published: 1998
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44. First upper limits on the radar cross section of cosmic-ray induced extensive air showers

Author: Abbasi, R.U., Abe, M., Abou Bakr Othman, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Besson, D., Blake, S.A., Byrne, M., Cady, R., Chae, M.J., Cheon, B.G., Chiba, J., Chikawa, M., Cho, W.R., Farhang-Boroujeny, B., Fujii, T., Fukushima, M., Gillman, W.H., Goto, T., Hanlon, W., Hanson, J.C., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jayanthmurthy, C., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kitamura, S., Kitamura, Y., Kunwar, S., Kuzmin, V., Kwon, Y.J., Lan, J., Lim, S.I., Lundquist, J.P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J.N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I.H., Prohira, S., Pshirkov, M.S., Rezazadeh-Reyhani, A., Rodriguez, D.C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A.L., Scott, L.M., Schurig, D., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Smith, J.D., Sokolsky, P., Springer, R.W., Stokes, B.T., Stratton, S.R., Stroman, T.A., Suzawa, T., Takai, H., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Venkatesh, S., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Published: 2017
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45. Search for EeV protons of galactic origin

Author: Abbasi, R.U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Cheon, B.G., Chiba, J., Chikawa, M., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashi, M., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kishigami, S., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y.J., Lan, J., Lubsandorzhiev, B., Lundquist, J.P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J.N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Onogi, R., Oshima, A., Ozawa, S., Park, I.H., Pshirkov, M.S., Rodriguez, D.C., Rubtsov, G., Ryu, D., Sagawa, H., Saito, K., Saito, Y., Sakaki, N., Sakurai, N., Scott, L.M., Sekino, K., Shah, P.D., Shibata, T., Shibata, F., Shimodaira, H., Shin, B.K., Shin, H.S., Smith, J.D., Sokolsky, P., Stokes, B.T., Stratton, S.R., Stroman, T.A., Suzawa, T., Takahashi, Y., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, M., Tanaka, K., Tanaka, H., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tirone, A.H., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Published: 2017
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46. The Detection of TeV Gamma Rays from Crab using the Telescope Array Prototype

Author: Aiso, S., Chikawa, M., Hayashi, Y., Hayashida, N., Hibino, K., Hirasawa, H., Honda, K., Hotta, N., Inoue, N., Ishikawa, F., Ito, N., Kabe, S., Kajino, F., Kashiwagi, T., Kawakami, S., Kawasaki, Y., Kawasumi, N., Kitamura, H., Kuramochi, K., Kurata, K., Kusano, E., Lafoux, H., Loh, E. C., Matsubara, Y., Matsuyama, T., Mizumoto, Y., Mizutani, K., Nagano, M., Nishikawa, D., Nishimura, J., Nishizawa, M., Ouchi, T., Ohoka, H., Ohnishi, M., Saito, To., Sakaki, N., Sakata, M., Sakumoto, K., Sasaki, M., Sasano, M., Shimodaira, H., Shiomi, A., Sokolsky, P., Sugiyama, T., Takahashi, T., Taylor, S., Teshima, M., Tsushima, I., Uchihori, Y., Yamamoto, T., Yamamoto, Y., Yoshida, S., Yoshii, H., and Yuda, T.
Subjects: Astrophysics
Abstract: The Telescope Array prototype detectors were installed at Akeno Observatory and at the Utah Fly's Eye site. Using these detectors, we have observed the Crab Nebula and AGN's since the end of 1995. The successful detections of TeV gamma rays from Crab Nebula and Mkn501 are reported., Comment: 4 pages, 5 figures, contribution to 25th ICRC Durban
Published: 1997

47. The energy spectrum of cosmic rays above 1017.2 eV measured by the fluorescence detectors of the Telescope Array experiment in seven years

Author: Abbasi, R.U., Abe, M., Abu-Zayyad, T., Allen, M., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Cheon, B.G., Chiba, J., Chikawa, M., Cho, W.R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y.J., Lan, J., Lundquist, J.P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J.N., Minamino, M., Mukai, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I.H., Pshirkov, M.S., Rodriguez, D.C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Scott, L.M., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Shin, H.S., Smith, J.D., Sokolsky, P., Springer, R.W., Stokes, B.T., Stratton, S.R., Stroman, T.A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Published: 2016
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48. The hybrid energy spectrum of Telescope Array’s Middle Drum Detector and surface array

Author: Abbasi, R.U., Abe, M., Abu-Zayyad, T., Allen, M.G., Anderson, R., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Chae, M.J., Cheon, B.G., Chiba, J., Chikawa, M., Cho, W.R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y.J., Lan, J., Lim, S.I., Lundquist, J.P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J.N., Minamino, M., Mukai, K., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I.H., Pshirkov, M.S., Rodriguez, D.C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A.L., Scott, L.M., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Shin, H.S., Smith, J.D., Sokolsky, P., Springer, R.W., Stokes, B.T., Stratton, S.R., Stroman, T.A., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Published: 2015
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49. Study of Ultra-High Energy Cosmic Ray composition using Telescope Array’s Middle Drum detector and surface array in hybrid mode

Author: Abbasi, R.U., Abe, M., Abu-Zayyad, T., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Chae, M.J., Cheon, B.G., Chiba, J., Chikawa, M., Cho, W.R., Fujii, T., Fukushima, M., Goto, T., Hanlon, W., Hayashi, Y., Hayashida, N., Hibino, K., Honda, K., Ikeda, D., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kawata, K., Kido, E., Kim, H.B., Kim, J.H., Kitamura, S., Kitamura, Y., Kuzmin, V., Kwon, Y.J., Lan, J., Lim, S.I., Lundquist, J.P., Machida, K., Martens, K., Matsuda, T., Matsuyama, T., Matthews, J.N., Minamino, M., Mukai, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nonaka, T., Nozato, A., Ogio, S., Ogura, J., Ohnishi, M., Ohoka, H., Oki, K., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I.H., Pshirkov, M.S., Rodriguez, D.C., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A.L., Scott, L.M., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Shin, H.S., Smith, J.D., Sokolsky, P., Springer, R.W., Stokes, B.T., Stratton, S.R., Stroman, T., Suzawa, T., Takamura, M., Takeda, M., Takeishi, R., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Uchihori, Y., Udo, S., Urban, F., Vasiloff, G., Wong, T., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yashiro, K., Yoneda, Y., Yoshida, S., Yoshii, H., Zollinger, R., and Zundel, Z.
Published: 2015
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50. Energy spectrum of ultra-high energy cosmic rays observed with the Telescope Array using a hybrid technique

Author: Abu-Zayyad, T., Aida, R., Allen, M., Anderson, R., Azuma, R., Barcikowski, E., Belz, J.W., Bergman, D.R., Blake, S.A., Cady, R., Cheon, B.G., Chiba, J., Chikawa, M., Cho, E.J., Cho, W.R., Fujii, H., Fujii, T., Fukuda, T., Fukushima, M., Hanlon, W., Hayashi, K., Hayashi, Y., Hayashida, N., Hibino, K., Hiyama, K., Honda, K., Iguchi, T., Ikeda, D., Ikuta, K., Inoue, N., Ishii, T., Ishimori, R., Ito, H., Ivanov, D., Iwamoto, S., Jui, C.C.H., Kadota, K., Kakimoto, F., Kalashev, O., Kanbe, T., Kasahara, K., Kawai, H., Kawakami, S., Kawana, S., Kido, E., Kim, H.B., Kim, H.K., Kim, J.H., Kitamoto, K., Kitamura, S., Kitamura, Y., Kobayashi, K., Kobayashi, Y., Kondo, Y., Kuramoto, K., Kuzmin, V., Kwon, Y.J., Lan, J., Lim, S.I., Lundquist, J.P., Machida, S., Martens, K., Matsuda, T., Matsuura, T., Matsuyama, T., Matthews, J.N., Minamino, M., Miyata, K., Murano, Y., Myers, I., Nagasawa, K., Nagataki, S., Nakamura, T., Nam, S.W., Nonaka, T., Ogio, S., Ohnishi, M., Ohoka, H., Oki, K., Oku, D., Okuda, T., Ono, M., Oshima, A., Ozawa, S., Park, I.H., Pshirkov, M.S., Rodriguez, D.C., Roh, S.Y., Rubtsov, G., Ryu, D., Sagawa, H., Sakurai, N., Sampson, A.L., Scott, L.M., Shah, P.D., Shibata, F., Shibata, T., Shimodaira, H., Shin, B.K., Shin, J.I., Shirahama, T., Smith, J.D., Sokolsky, P., Springer, R.W., Stokes, B.T., Stratton, S.R., Stroman, T., Suzuki, S., Takahashi, Y., Takeda, M., Taketa, A., Takita, M., Tameda, Y., Tanaka, H., Tanaka, K., Tanaka, M., Thomas, S.B., Thomson, G.B., Tinyakov, P., Tkachev, I., Tokuno, H., Tomida, T., Troitsky, S., Tsunesada, Y., Tsutsumi, K., Tsuyuguchi, Y., Uchihori, Y., Udo, S., Ukai, H., Urban, F., Vasiloff, G., Wada, Y., Wong, T., Yamakawa, Y., Yamane, R., Yamaoka, H., Yamazaki, K., Yang, J., Yoneda, Y., Yoshida, S., Yoshii, H., Zhou, X., Zollinger, R., and Zundel, Z.
Published: 2015
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