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Observation of transient objects with the Cherenkov Telescope Array telescopes

Research Project

Project/Area Number 19K21043
Project/Area Number (Other) 18H05858 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0203:Particle-, nuclear-, astro-physics, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Noda Koji  東京大学, 宇宙線研究所, 准教授 (00816837)

Project Period (FY) 2018-08-24 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords高エネルギーガンマ線 / 突発天体 / ガンマ線バースト / チェレンコフ望遠鏡 / 電源システム
Outline of Research at the Start

本研究の目的は、チェレンコフ望遠鏡アレイ国際共同実験による、宇宙で突発的に起こる天体の理解である。スペイン・ラパルマ島にある大口径望遠鏡を用いて、ガンマ線バーストなどの突発天体を発生直後20秒以内で観測する。そのためには、望遠鏡を高速で駆動する必要があり、必要な大電力を一時的に供給するための特別な電源システムの整備が鍵となる。本研究では、同電源システムを観測所に統合する開発・設置を行う。

Outline of Final Research Achievements

We aim to observe and understand transient objects in the Universe, such as gamma-ray bursts, using telescopes in an international collaborative project, Cherenkov Telescope Array. CTA Large Size Telescope (LST) requires a special high-power supply system in order to point to any object in the sky and start to observe it within 20 seconds. In this program we first developed and deployed a monitoring and alerting systems of the power supply system, and achieved a stable operation, leading to obtaining gamma-ray signals from Crab Nebula as expected. In parallel, using MAGIC telescopes, which are the model of LSTs and are located at the same observational site as LST, we finally discovered gamma rays with energies beyond teraelectronvolt from a gamma-ray burst, and have obtained an insight into its gamma-ray emission mechanism.

Academic Significance and Societal Importance of the Research Achievements

ガンマ線バーストの素性は長らく謎に包まれていたが、今世紀に入り研究が活発化し、メガ電子ボルトのガンマ線やエックス線、さらに長い(エネルギーの低い)波長領域での理解が進んだ。しかしギガ電子ボルト以上のガンマ線放射については、放射機構は謎のままであり、テラ電子ボルトに至っては未発見であった。本研究はこれを突破する初の発見となり、そのインパクトは非常に大きい。本成果はMAGIC望遠鏡によってなされたが、CTA LSTは言わばMAGICのアップグレード版であり、MAGICでの発見が今後LSTに引き継がれ強力に進むことは疑いがない。その意味でLSTを安定運用につなげた本研究の成果も同様に重要である。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • Research Products

    (15 results)

All 2020 2019 Other

All Int'l Joint Research (6 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] LAPP(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] IFAE/CIEMAT(スペイン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] MPI for Physics(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] LAPP(フランス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] IFAE/CIEMAT(スペイン)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] MPI for Physics(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Teraelectronvolt emission from the γ-ray burst GRB 190114C2019

    • Author(s)
      MAGIC Collaboration
    • Journal Title

      Nature

      Volume: 575 Issue: 7783 Pages: 455-458

    • DOI

      10.1038/s41586-019-1750-x

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Observation of inverse Compton emission from a long γ-ray burst2019

    • Author(s)
      MAGIC Collaboration
    • Journal Title

      Nature

      Volume: 575 Issue: 7783 Pages: 459-463

    • DOI

      10.1038/s41586-019-1754-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Cherenkov Telescope Array (CTA) 計画: 全体報告(17)2020

    • Author(s)
      野田浩司 他CTA Consortium
    • Organizer
      日本天文学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] CTA報告160: CTA大口径望遠鏡初号機のモノ解析 現状2020

    • Author(s)
      野崎誠也 他CTA Consortium
    • Organizer
      日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] MAGIC報告71: GRB 190114Cからの TeVガンマ線の発見2019

    • Author(s)
      野田浩司 他MAGIC Collaboration
    • Organizer
      日本物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Discovery of VHE gamma rays from GRB 190114C2019

    • Author(s)
      Koji Noda for MAGIC Collaboration
    • Organizer
      TAUP 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Discovery of VHE gamma rays from GRB 190114C2019

    • Author(s)
      Koji Noda for MAGIC Collaboration
    • Organizer
      Yamada Conference LXXI: Gamma-ray Bursts in the Gravitational Wave Era 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] CTA報告154:CTA大口径望遠鏡高速回転電源システムの開発試験2019

    • Author(s)
      久門拓、野田浩司、手嶋政廣、齋藤隆之 他 CTA共同研究者
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Annual Research Report
  • [Remarks] 【プレスリリース】地上のチェレンコフ望遠鏡がガンマ線バーストの信号を初観測

    • URL

      http://www.icrr.u-tokyo.ac.jp/news/6322/

    • Related Report
      2019 Annual Research Report

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Published: 2018-08-27   Modified: 2024-03-26  

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