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Search for point sources of ultra-high-energy photons with the Telescope Array surface detector
https://repo.qst.go.jp/records/80027
https://repo.qst.go.jp/records/800279c4c16dc-e621-489f-9349-0958d8259c53
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-06-09 | |||||
| タイトル | ||||||
| タイトル | Search for point sources of ultra-high-energy photons with the Telescope Array surface detector | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
U Abbasi, R
× U Abbasi, R× Abe, M× T, Abu-Zayyad× Allen, M× Azuma, R× Barcikowski, E× W Belz, J× R Bergman, D× A Blake, S× R Cady× Uchihori, Yukio× others, Many× Uchihori, Yukio |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 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. | |||||
| 書誌情報 |
Monthly Notices of the Royal Astronomical Society 巻 492, 号 3, p. 3984-3993, 発行日 2020-06 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0035-8711 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1093/mnras/stz3618 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://academic.oup.com/mnras/article-abstract/492/3/3984/5721286?redirectedFrom=fulltext | |||||
