Observation of Transient Phenomena based on the Automated Real-time Analysis System for CALET

• Project/Area Number: 17H02901
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Waseda University
• Principal Investigator: ASAOKA Yoichi 早稲田大学, 理工学術院総合研究所(理工学研究所), 主任研究員(研究院准教授) (40345054)
• Co-Investigator(Kenkyū-buntansha): 片岡 龍峰 国立極地研究所, 研究教育系, 准教授 (90462671)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2018: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000); Fiscal Year 2017: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
• Keywords: 重力波 / マルチメッセンジャー / CALET / ガンマ線 / トランジェント / ガンマ線バースト / 太陽変調 / ガンマ線突発天体 / 宇宙天気 / 宇宙線電子 / フォーブッシュ減少 / 宇宙線 / 宇宙物理 / 国際宇宙ステーション(ISS) / 重力波対応天体

Outline of Final Research Achievements

In a rapidly growing field of gravitational-wave astronomy, multi-messenger observations including X-ray and gamma rays are highly important as clearly demonstrated by the observations of the neutron star-neutron star merger event GW 170817 by LIGO/Virgo observatory and the associated electromagnetic detections.
The CALorimetric Electron Telescope (CALET) is an instrument for direct measurements of cosmic rays including gamma rays onboard the International Space Station.
In this research project, an automated transient search system has been developed in the CALET ground system in order to search for transients in a semi-real-time manner. Using the system, we have continuously performed GeV-energy gamma-ray searches associated with gravitational-wave events. In addition, the system was applied to study the temporal variation of low-energy electron flux and to monitor space weather.

Academic Significance and Societal Importance of the Research Achievements

国際宇宙ステーションに搭載された宇宙線観測装置であるCALETの主目的は，電子をはじめとする高エネルギー宇宙線のスペクトル観測です．それに対して，本研究ではCALETの地上システムに64コアのサーバーを2台導入しデータ解析を高速化することで，重力波などの突発天体に対応するガンマ線探索を準リアルタイムで行えるようにしました．これにより多数観測された重力波イベントに対してタイムリーにCALETによるガンマ線探索結果を報告することができました．宇宙空間に検出器を持つという貴重な機会を最大限活用するため，今後も継続的にガンマ線探索や宇宙天気の監視を実施します．

Research Products

• [Int'l Joint Research] NASA Goddard Space Flight Center/Louisiana State University/Washington University St. Louis(米国)
• [Int'l Joint Research] Pisa University & INFN/Florence University & INFN/IFAC-CNR(イタリア)
• [Int'l Joint Research] Louisiana State University/NASA/GSFC/Washington University(米国)
• [Int'l Joint Research] University of Siena/University of Florence/University of Rome ``Tor Vergata''(イタリア)
• [Journal Article] Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station (2019)
  • Author(s): O,Adriani, Y.Asaoka, M.Mori, S.Torii et al. (CALET Collaboration)
  • Journal Title: Physical Review Letters Volume: 122 Issue: 18 Pages: 181102-181102
  • DOI: 10.1103/physrevlett.122.181102
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurements of Heavy Cosmic-Ray Nuclei Spectra with CALET on the ISS (2019)
  • Author(s): Y.Akaike et al. (CALET Collaboration)
  • Journal Title: Journal of Physics: Conf. Series (26th Extended European Cosmic Ray Symposium) Volume: 1181 Pages: 012042-012042
  • DOI: 10.1088/1742-6596/1181/1/012042
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years (2019)
  • Author(s): Y Asaoka et al. (CALET Collaboration)
  • Journal Title: Journal of Physics: Conf. Series (26th Extended European Cosmic Ray Symposium) Volume: 1181 Pages: 012003-012003
  • DOI: 10.1088/1742-6596/1181/1/012003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The CALorimetric Electron Telescope (CALET) on the International Space Station (2019)
  • Author(s): Shoji Torii and Pier Simone Marrocchesi for the CALET collaboration
  • Journal Title: Advances in Space Research Volume: 64 Issue: 12 Pages: 2531-2537
  • DOI: 10.1016/j.asr.2019.04.013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Measurement of cosmic-ray carbon and oxygen energy spectra with CALET (2019)
  • Author(s): Paolo Maestro for the CALET collaboration
  • Journal Title: Advances in Space Research Volume: 64 Issue: 12 Pages: 2538-2545
  • DOI: 10.1016/j.asr.2019.04.015
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years of Operation (2019)
  • Author(s): Asaoka Y、et al
  • Journal Title: EPJ Web of Conferences Volume: 208 Pages: 13001-13001
  • DOI: 10.1051/epjconf/201920813001
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radiation dose during relativistic electron precipitation events at the International Space Station (2019)
  • Author(s): Ueno H., Nakahira S., Kataoka R., Asaoka Y., Torii S., Ozawa S., Matsumoto H., Bruno A., Nolfo G.A., Collazuol G., Ricciarini S.B.
  • Journal Title: Space Weather Volume: - Issue: 7 Pages: 209431-7
  • DOI: 10.1029/2019sw002280
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An Interpretation of the Cosmic Ray Electron + Positron Spectrum from 10 GeV to 3 TeV Measured by CALET on the ISS (2019)
  • Author(s): Saptashwa Bhattacharyya, Holger Motz, Yoichi Asaoka, Shoji Torii
  • Journal Title: International Journal of Modern Physics D Volume: 28 Issue: 02 Pages: 1950035-1950035
  • DOI: 10.1142/s0218271819500354
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The CALorimetric Electron Telescope (CALET) on the International Space Station (2019)
  • Author(s): Y. Asaoka et al. (CALET Collaboration)
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 0011-16
  • Open Access / Int'l Joint Research
• [Journal Article] CALET Upper Limits on GeV-energy Gamma-Ray Burst Emission (2019)
  • Author(s): N. W. Cannady et al. (CALET Collaboration)
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 5571-8
  • Open Access / Int'l Joint Research
• [Journal Article] Gamma-ray burst observations with the CALET Gamma-ray Burst Monitor (2019)
  • Author(s): Y. Kawakubo et al. (CALET Collaboration)
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 5711-8
  • Open Access / Int'l Joint Research
• [Journal Article] Space Weather Observations during September 2017 with CALET on the International Space Station (2019)
  • Author(s): A. Bruno et al. (CALET Collaboration)
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 10631-8
  • Open Access / Int'l Joint Research
• [Journal Article] Solar Modulation of Galactic Cosmic-Ray Electrons Measured with CALET (2019)
  • Author(s): S. Miyake, Y. Migita, Y. Asaoka, Y. Akaike, S. Torii, T. Terasawa, R. Kataoka, K. Sakai et al. (CALET Collaboration)
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 11261-8
  • Open Access / Int'l Joint Research
• [Journal Article] High-Energy Gamma-ray Observations Using the CALorimetric Electron Telescope (CALET) on the ISS (2019)
  • Author(s): Masaki Mori and Yoichi Asaoka for the CALET Collaboration
  • Journal Title: Proceedings of Science (ICRC2019) Volume: 358 Pages: 5861-8
  • Open Access / Int'l Joint Research
• [Journal Article] Characteristics and Performance of the CALorimetric Electron Telescope (CALET) Calorimeter for Gamma-Ray Observations (2018)
  • Author(s): Cannady N.、Mori M.、他91名（CALET collaboration）
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 238 Issue: 1 Pages: 5-5
  • DOI: 10.3847/1538-4365/aad6a3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Search for GeV Gamma-Ray Counterparts of Gravitational Wave Events by CALET (2018)
  • Author(s): Adriani O.、Mori M.、他89名（CALET collaboration）
  • Journal Title: The Astrophysical Journal Volume: 863 Issue: 2 Pages: 160-160
  • DOI: 10.3847/1538-4357/aad18f
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] カロリメータ型宇宙線電子望遠鏡CALETの初期観測成果 (2018)
  • Author(s): 鳥居祥二, 浅岡陽一, 森正樹, 吉田篤正
  • Journal Title: 日本物理学会誌 Volume: 73 Pages: 388-392
• [Journal Article] On-orbit Operations and Offline Data Processing of CALET onboard the ISS (2018)
  • Author(s): Y. Asaoka, M. Mori et al.
  • Journal Title: Astroparticle Physics Volume: 100 Pages: 29-37
  • DOI: 10.1016/j.astropartphys.2018.02.010
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi-messenger Observations of a Binary Neutron Star Merger (2017)
  • Author(s): Abbott B. P., Abbott, R., Abbott, T. D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R. X., Adya, V. B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O. D., Aiello, L., Ain, A., Ajith, P. 他 Negoro, H. 含む 3656 名
  • Journal Title: The Astrophysical Journal Letters Volume: 848 Issue: 2 Pages: 1-59
  • DOI: 10.3847/2041-8213/aa91c9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] CALETによる4.5年間の軌道上観測の最新成果 (2020)
  • Author(s): 鳥居祥二
  • Organizer: 日本物理学会第７５回年次大会（2020) オンライン
• [Presentation] CALET：4年半にわたる軌道上運用のまとめ (2020)
  • Author(s): 浅岡陽一
  • Organizer: 日本物理学会第７５回年次大会（2020) オンライン
• [Presentation] CALET：ガンマ線バーストの観測と重力波電磁波対応天体の探査 (2020)
  • Author(s): 川久保雄太
  • Organizer: 日本物理学会第７５回年次大会（2020) オンライン
• [Presentation] CALETによる太陽活動極小期の1-10GeV全電子観測 (2020)
  • Author(s): 三宅晶子
  • Organizer: 日本物理学会第７５回年次大会（2020) オンライン
• [Presentation] CALETによる低エネルギー陽子・電子計数率の長期時間変化の同時観測 (2020)
  • Author(s): 高柚季乃
  • Organizer: 日本物理学会第７５回年次大会（2020) オンライン
• [Presentation] 国際宇宙ステーション搭載CALETの最新成果 (2020)
  • Author(s): 鳥居祥二
  • Organizer: 第２０回宇宙科学シンポジウム、宇宙科学研究所、相模原
• [Presentation] CALETの運用状況と電子、陽子・原子核スペクトル (2020)
  • Author(s): 浅岡陽一
  • Organizer: 第２０回宇宙科学シンポジウム、宇宙科学研究所、相模原
• [Presentation] High Energy Gamma-rays and Gamma-ray Bursts Observations by CALET (2020)
  • Author(s): T. Sakamoto
  • Organizer: 第２０回宇宙科学シンポジウム、宇宙科学研究所、相模原
• [Presentation] Recent Results and Dark Matter Search with CALET on the ISS (2019)
  • Author(s): Yoichi Asaoka
  • Organizer: Dark Matter searches in the 2020s - At the crossroads of the WIMP, ICRR, University of Tokyo, Kashiwa, Japan
  • Int'l Joint Research / Invited
• [Presentation] CALET Results after Three Years on the International Space Station (2019)
  • Author(s): Yoichi Asaoka
  • Organizer: 16th International Conference on Topics in Astroparticle and Underground Physics, Toyama, Japan
  • Int'l Joint Research
• [Presentation] The CALorimetric Electron Telescope (CALET) on the International Space Station (2019)
  • Author(s): Yoichi Asaoka
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference (Highlight Talk), Madison, WI, USA
  • Int'l Joint Research / Invited
• [Presentation] CALET Upper Limits on GeV-energy Gamma-Ray Burst Emission (2019)
  • Author(s): N. W. Cannady
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference, Madison, WI, USA
  • Int'l Joint Research
• [Presentation] Gamma-ray burst observations with the CALET Gamma-ray Burst Monitor (2019)
  • Author(s): Y.Kawakubo
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference, Madison, WI, USA
  • Int'l Joint Research
• [Presentation] Space Weather Observations during September 2017 with CALET on the International Space Station (2019)
  • Author(s): A.Bruno
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference, Madison, WI, USA
  • Int'l Joint Research
• [Presentation] Solar Modulation of Galactic Cosmic-Ray Electrons Measured with CALET (2019)
  • Author(s): S. Miyake
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference, Madison, WI, USA
  • Int'l Joint Research
• [Presentation] High-Energy Gamma-ray Observations Using the CALorimetric Electron Telescope (CALET) on the ISS (2019)
  • Author(s): Masaki Mori
  • Organizer: ICRC2019: 36th International Cosmic Ray Conference, Madison, WI, USA
  • Int'l Joint Research
• [Presentation] 宇宙線直接観測と暗黒物質の間接探索 (2019)
  • Author(s): 浅岡陽一
  • Organizer: ダークマターの懇談会、早稲田大学
  • Invited
• [Presentation] CALETによる軌道上観測の最新成果 (2019)
  • Author(s): 鳥居祥二
  • Organizer: 日本物理学会２０１９年秋季大会、山形大学
• [Presentation] CALETにおける高エネルギーガンマ線の観測と解析II (2019)
  • Author(s): 森正樹
  • Organizer: 日本物理学会２０１９年秋季大会、山形大学
• [Presentation] CALETによる第24太陽活動周期の1-10GeV全電子観測 (2019)
  • Author(s): 三宅晶子
  • Organizer: 日本物理学会２０１９年秋季大会、山形大学
• [Presentation] Recent Results from the CALorimetric Electron Telescope (CALET) on the International Space Station (2019)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: The 10th International Workshop on Very High Energy Particle Astronomy (VHEPA2019)
  • Int'l Joint Research / Invited
• [Presentation] Latest Results from the CALorimetric Electron Telescope (CALET) on the International Space Station (2019)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: International symposium ``Recent progress in heliospheric physics by direct measurements of unexplored space plasmas''
  • Int'l Joint Research
• [Presentation] CALETによる高エネルギーガンマ線の観測と解析 (2019)
  • Author(s): 森正樹，浅岡陽一，鳥居祥二，小澤俊介，藤田崚，吉川康太，N. Cannady，M. Cherry，他CALETチーム
  • Organizer: 日本物理学会 第74回年次大会
• [Presentation] CALETによる1-10GeV全電子の太陽変調観測 (2019)
  • Author(s): 三宅晶子, 右田陽太郎, 鳥居祥二, 浅岡陽一, 寺澤敏夫, 小澤俊介, 片岡龍峰, 宗像一起, 他CALETチーム
  • Organizer: 日本物理学会 第74回年次大会
• [Presentation] Cosmic-ray Electron and Positron Spectrum from CALET Observations on ISS (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: Searching for the Sources of Galactic Cosmic Rays
  • Int'l Joint Research / Invited
• [Presentation] The CALorimetric Electron Telescope (CALET) on the International Space Station -- Results from the First Two Years of Operation -- (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: 26th Extended European Cosmic Ray Symposium and 35th Russian Cosmic Ray Conference (26th E+CRS / 35th RCRC)
  • Int'l Joint Research / Invited
• [Presentation] he CALorimetric Electron Telescope (CALET) on the International Space Station: Results from the First Two Years of Operation (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: 20th International Symposium on Very High Energy Cosmic Ray Interactions (20th ISVHECRI)
  • Int'l Joint Research / Invited
• [Presentation] The Calorimetric Electron Telescope (CALET) on the International Space Station: Latest results from the first three-years on orbit (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: TeV Particle Astrophysics 2018 (TeVPA 2018)
  • Int'l Joint Research
• [Presentation] Measurement of Cosmic-Ray Electron and Positron Spectrum from CALET on the ISS (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: 42nd COSPAR Assembly
  • Int'l Joint Research
• [Presentation] Search for gamma-ray counterparts of gravitational wave events by CALET (2018)
  • Author(s): Masaki Mori, Yoichi Asaoka for the CALET collaboration
  • Organizer: 42nd COSPAR Assembly
  • Int'l Joint Research
• [Presentation] 宇宙線電子望遠鏡 CALET：3年間の軌道上観測による最新の成果 (2018)
  • Author(s): 浅岡陽一, CALET共同研究者
  • Organizer: 高エネルギー宇宙物理学研究会2018
• [Presentation] CALETにおけるトランジェントガンマ線観測システムの開発 (2018)
  • Author(s): 吉川康太, 浅岡陽一, 鳥居祥二, 森正樹, 小澤俊介, 藤田崚, 他CALETチーム
  • Organizer: 日本物理学会 2018年秋季大会
• [Presentation] CALETで観測する低エネルギー電子による太陽変調の研究 (2018)
  • Author(s): 右田陽太郎, 鳥居祥二, 浅岡陽一, 寺沢敏夫, 小澤俊介, 三宅晶子, 片岡龍峰, 宗像一起, 他CALETチーム
  • Organizer: 日本物理学会 2018年秋季大会
• [Presentation] Search for GeV Gamma-Ray Counterparts of Gravitational Wave Events with CALET (2018)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: Gravitational wave physics and astronomy: Genesis
  • Int'l Joint Research
• [Presentation] CALETによるトランジェントガンマ線源の観測 (2018)
  • Author(s): 森正樹, 浅岡陽一, 鳥居祥二, 佐藤郁也, 田中瑞樹, N. Cannady, M.L. Cherry, 他CALETチーム
  • Organizer: 日本物理学会
• [Presentation] CALETによる2年間の宇宙線観測成果 (2018)
  • Author(s): 浅岡陽一他，CALET共同研究者
  • Organizer: 平成29年度ISEE研究集会 － 太陽圏宇宙線シンポジウム
  • Invited
• [Presentation] CALETにおけるガンマ線解析手法の改良 (2018)
  • Author(s): 藤田崚, 鳥居祥二, 浅岡陽一, 森正樹, 小澤俊介, 吉川康太, 田中瑞樹, 佐藤郁也, 他CALETチーム
  • Organizer: 日本物理学会
• [Presentation] CALET preliminary results on the cosmic ray observations for the first two-years on the ISS (2017)
  • Author(s): Yoichi Asaoka for the CALET collaboration
  • Organizer: The 2017 Cosmic Ray Anisotropy Workshop (CRA 2017)
  • Int'l Joint Research / Invited
• [Presentation] CALET : Summary of the First Two-Years on Orbit (2017)
  • Author(s): Shoji Torii, Yoichi Asaoka (presenter) for the CALET collaboration
  • Organizer: TeV Particle Astrophysics 2017 (TeVPA 2017)
  • Int'l Joint Research
• [Presentation] CALETにおけるトランジェントガンマ線観測システム (2017)
  • Author(s): 吉川康太，佐藤郁也，田中瑞樹， 藤田崚，浅岡陽一，鳥居祥二，小澤俊介，森正樹，他CALETチーム
  • Organizer: 宇宙科学シンポジウム
• [Presentation] CALETによるガンマ線トランジェント現象の自動検出方法の開発 (2017)
  • Author(s): 田中瑞樹, 浅岡陽一, 鳥居祥二, 小澤俊介, 佐藤郁也, 吉川康太, 藤田崚, 他CALETチーム
  • Organizer: 日本物理学会
• [Presentation] CALETにおける低エネルギー電子観測による太陽変調の初期解析 (2017)
  • Author(s): 安藤祐貴, 鳥居祥二, 浅岡陽一,小澤俊介,三宅晶子, 他CALETチーム
  • Organizer: 日本物理学会
• [Remarks] CALET-カロリメータ型宇宙電子線望遠鏡
  • URL: https://calet.jp
• [Remarks] DARTS/CALET at ISAS/JAXA
  • URL: http://darts.jaxa.jp/astro/calet
• [Remarks] 高エネルギー電子・ガンマ線観測装置（CALET)
  • URL: https://iss.jaxa.jp/kiboexp/equipment/ef/calet