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Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | 천병구 | - |
| dc.date.accessioned | 2020-04-08T02:12:32Z | - |
| dc.date.available | 2020-04-08T02:12:32Z | - |
| dc.date.issued | 2019-07 | - |
| dc.identifier.citation | ASTROPARTICLE PHYSICS, v. 110, Page. 8-14 | en_US |
| dc.identifier.issn | 0927-6505 | - |
| dc.identifier.issn | 1873-2852 | - |
| dc.identifier.uri | https://www.sciencedirect.com/science/article/pii/S0927650518302950?via%3Dihub | - |
| dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/148370 | - |
| dc.description.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 km(-2) yr(-1) sr(-1) correspondingly. (C) 2019 Elsevier B.V. All rights reserved. | en_US |
| dc.description.sponsorship | The Telescope Array experiment is supported by the Japan Society for the Promotion of Science (JSPS) through Grants-in-Aid for Priority Area 431, for Specially Promoted Research JP21000002, for Scientific Research (S) JP19104006, for Specially Promote Research JP15H05693, for Scientific Research (S) JP15H05741 and for Young Scientists (A) JPH26707011; by the joint research program of the Institute for Cosmic Ray Research (ICRR), The University of Tokyo; by the U.S. National Science Foundation awards PHY-0601915, PHY-1404495, PHY-1404502, and PHY-1607727; by the National Research Foundation of Korea (2017K1A4A3015188; 2016R1A2B4014967; 2017R1A2A1A05071429, 2016R1A5A1013277); by IISN project no. 4.4502.13, and Belgian Science Policy under IUAP VII/37 (ULB). The development and application of the multi-variate analysis method is supported by the Russian Science Foundation grant no. 17-72-20291 (INR). The foundations of Dr. Ezekiel R. and Edna Wattis Dumke, Willard L. Eccles, and George S. and Dolores Dore Eccles all helped with generous donations. The State of Utah supported the project through its Economic Development Board, and the University of Utah through the Office of the Vice President for Research. The experimental site became available through the cooperation of the Utah School and Institutional Trust Lands Administration (SITLA), U.S. Bureau of Land Management (BLM), and the U.S. Air Force. We appreciate the assistance of the State of Utah and Fillmore offices of the BLM in crafting the Plan of Development for the site. Patrick Shea assisted the collaboration with valuable advice on a variety of opics. The people and the officials of Millard County, Utah have been a source of steadfast and warm support for our work which we greatly appreciate. We are indebted to the Millard County Road Department for their efforts to maintain and clear the roads which get us to our sites. We gratefully acknowledge the contribution from the technical staffs of our home institutions. An allocation of computer time from the Center for High Performance Computing at the University of Utah is gratefully acknowledged. The cluster of the Theoretical Division of INR RAS was used for the numerical part of the work. The lightning data used in this paper was obtained from Vaisala, Inc. We appreciate Vaisala's academic research policy. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | ELSEVIER SCIENCE BV | en_US |
| dc.subject | Ultra-high-energy photons | en_US |
| dc.subject | Telescope array experiment | en_US |
| dc.subject | Extensive air showers | en_US |
| dc.title | Constraints on the diffuse photon flux with energies above 10(18) eV using the surface detector of the Telescope Array experiment | en_US |
| dc.type | Article | en_US |
| dc.relation.volume | 110 | - |
| dc.identifier.doi | 10.1016/j.astropartphys.2019.03.003 | - |
| dc.relation.page | 8-14 | - |
| dc.relation.journal | ASTROPARTICLE PHYSICS | - |
| dc.contributor.googleauthor | Abbasi, R. U. | - |
| dc.contributor.googleauthor | Abe, M. | - |
| dc.contributor.googleauthor | Abu-Zayyad, T. | - |
| dc.contributor.googleauthor | Allen, M. | - |
| dc.contributor.googleauthor | Azuma, R. | - |
| dc.contributor.googleauthor | Barcikowski, E. | - |
| dc.contributor.googleauthor | Belz, J. W. | - |
| dc.contributor.googleauthor | Bergman, D. R. | - |
| dc.contributor.googleauthor | Blake, S. A. | - |
| dc.contributor.googleauthor | Cheon, B. G. | - |
| dc.relation.code | 2019000969 | - |
| dc.sector.campus | S | - |
| dc.sector.daehak | COLLEGE OF NATURAL SCIENCES[S] | - |
| dc.sector.department | DEPARTMENT OF PHYSICS | - |
| dc.identifier.pid | bgcheon | - |
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