Search for point sources of ultra-high-energy photons with the Telescope Array surface detector
Abstract
The surface detector (SD) of the Telescope Array (TA) experiment allows us to detect indirectly photons with energies of the order of 1018 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 are separated from the hadron-induced extensive air shower 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. The average 95 per cent confidence level upper-limits for the point-source flux of photons with energies greater than 1018, 1018.5, 1019, 1019.5 and 1020 eV are 0.094, 0.029, 0.010, 0.0073 and 0.0058 km−2yr−1, respectively. For energies higher than 1018.5 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 03, 2020
- Source ID
- 10.1093/mnras/stz3618
Entities
People
- A. Oshima
- A. Taketa
- Armando di Matteo
- B. G. Cheon
- B. K. Shin
- B. Lubsandorzhiev
- B. T. Stokes
- C. C. H. Jui
- D. C. Rodriguez
- D. Ikeda
- D. R. Bergman
- Dmitri Ivanov
- Dongsu Ryu
- E. Barcikowski
- E. Kido
- F. Kakimoto
- F. Shibata
- F. Urban
- G. B. Thomson
- G. Furlich
- G. Rubtsov
- H. B. Kim
- H. Ito
- H. Kawai
- H. M. Jeong
- H. Oda
- H. Ohoka
- H. S. Shin
- H. Sagawa
- H. Shimodaira
- H. Tanaka
- H. Tokuno
- H. Yamaoka
- H. Yoshii
- I. H. Park
- I. Myers
- I. Tkachev
- J. Chiba
- J. N. Matthews
- J. P. Lundquist
- J. Remington
- J. W. Belz
- Jeong‐Han Kim
- Jeremy Yang
- Jonathan D. H. Smith
- K. Fujita
- K. H. Lee
- K. Hibino
- K. Honda
- K. Kadota
- K. Kasahara
- K. Kawata
- K. Machida
- K. Martens
- K. Mukai
- K. Nakai
- K. Saito
- K. Sekino
- K. Tsutsumi
- K. Yada
- K. Yamazaki
- K. Yashiro
- Kōichi Tanaka
- L. M. Scott
- M. Abe
- M. Chikawa
- M. Fukushima
- M. Hayashi
- M. Kuznetsov
- M. Minamino
- M. Ohnishi
- M. Ono
- M. S. Pshirkov
- M. Takamura
- M. Takeda
- M. Tanaka
- M. Yamamoto
- Maika Takita
- Monica Allen
- N. Hayashida
- N. Inoue
- N. Sakaki
- N. Sakurai
- O. Kalashev
- P. D. Shah
- P. Sokolsky
- P. Tinyakov
- R. Azuma
- R. Cady
- R. Fujiwara
- R. Ishimori
- R. Mayta
- R. Nakamura
- R. Onogi
- R. Takeishi
- Rasha Abbasi
- Ryoji Sahara
- S. A. Blake
- S. B. Thomas
- S. Kawakami
- S. Kawana
- S. Kishigami
- S. Nagataki
- S. Ogio
- S. Ozawa
- S. R. Stratton
- S. Udo
- Sergey Troitsky
- Soyeon Jeong
- T. A. Stroman
- T. Abu-zayyad
- T. Ishii
- T. Matsuyama
- T. Nakamura
- T. Nonaka
- T. Okuda
- T. Sako
- T. Seki
- T. Shibata
- T. Suzawa
- T. Tomida
- Tan F. Wong
- The Telescope Array Collaboration
- Toshihiro Fujii
- V. Kuzmin
- W. Hanlon
- Y. Hayashi
- Y. J. Kwon
- Y. Omura
- Y. Saito
- Y. Takagi
- Y. Takahashi
- Y. Tameda
- Y. Tanoue
- Y. Tsunesada
- Y. Uchihori
- Y. Zhezher
- Z. Zundel
Organizations
- Central European Institute for Cosmology and Fundamental Physics
- Chiba University
- Ehime University
- Ewha Womans University
- Hanyang University
- Hiroshima City University
- Japan Society for the Promotion of Science
- Kanagawa University
- Kindai University
- Kyoto University
- Kōchi University
- Moscow State University
- National Research Foundation of Korea
- National Science Foundation
- Osaka City University
- Osaka Electro-Communication University
- RIKEN
- Ritsumeikan University
- Russian Academy of Sciences
- Russian Science Foundation
- Rutgers University
- Saitama University
- Shinshu University
- Sungkyunkwan University
- Tokyo City University
- Tokyo Institute of Technology
- Tokyo University of Science
- Ulsan National Institute of Science and Technology
- United States Air Force
- University of Tokyo
- University of Utah
- University of Yamanashi
- Université Libre de Bruxelles
- Waseda University
- Yonsei University