A Northern Sky Survey for Point-Like Sources of EeV Neutral Particles with the Telescope Array Experiment
Abstract
We report on the search for steady point-like sources of neutral particles around 10 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 yr for 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 yr for EeV. This is an order of magnitude lower than previous flux measurements.
Keywords
Cite
@article{arxiv.1407.6145,
title = {A Northern Sky Survey for Point-Like Sources of EeV Neutral Particles with the Telescope Array Experiment},
author = {R. U. Abbasi and M. Abe and T. Abu-Zayyad and M. Allen and R. Anderson and R. Azuma and E. Barcikowski and J. W. Belz and D. R. Bergman and S. A. Blake and R. Cady and M. J. Chae and B. G. Cheon and J. Chiba and M. Chikawa and W. R. Cho and T. Fujii and M. Fukushima and T. Goto and W. Hanlon and Y. Hayashi and N. Hayashida and K. Hibino and K. Honda and D. Ikeda and N. Inoue and T. Ishii and R. Ishimori and H. Ito and D. Ivanov and C. C. H. Jui and K. Kadota and F. Kakimoto and O. Kalashev and K. Kasahara and H. Kawai and S. Kawakami and S. Kawana and K. Kawata and E. Kido and H. B. Kim and J. H. Kim and J. H. Kim and S. Kitamura and Y. Kitamura and V. Kuzmin and Y. J. Kwon and J. Lan and S. I. Lim and J. P. Lundquist and K. Machida and K. Martens and T. Matsuda and T. Matsuyama and J. N. Matthews and M. Minamino and K. Mukai and I. Myers and K. Nagasawa and S. Nagataki and T. Nakamura and T. Nonaka and A. Nozato and S. Ogio and J. Ogura and M. Ohnishi and H. Ohoka and K. Oki and T. Okuda and M. Ono and A. Oshima and S. Ozawa and I. H. Park and M. S. Pshirkov and D. C. Rodriguez and G. Rubtsov and D. Ryu and H. Sagawa and N. Sakurai and A. L. Sampson and L. M. Scott and P. D. Shah and F. Shibata and T. Shibata and H. Shimodaira and B. K. Shin and J. D. Smith and P. Sokolsky and R. W. Springer and B. T. Stokes and S. R. Stratton and T. A. Stroman and T. Suzawa and M. Takamura and M. Takeda and R. Takeishi and A. Taketa and M. Takita and Y. Tameda and H. Tanaka and K. Tanaka and M. Tanaka and S. B. Thomas and G. B. Thomson and P. Tinyakov and I. Tkachev and H. Tokuno and T. Tomida and S. Troitsky and Y. Tsunesada and K. Tsutsumi and Y. Uchihori and S. Udo and F. Urban and G. Vasiloff and T. Wong and R. Yamane and H. Yamaoka and K. Yamazaki and J. Yang and K. Yashiro and Y. Yoneda and S. Yoshida and H. Yoshii and R. Zollinger and Z. Zundel},
journal= {arXiv preprint arXiv:1407.6145},
year = {2015}
}
Comments
27 pages, 10 figures, 3 tables, accepted for publication in the Astrophysical Journal