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Search for High Energy Gamma-ray Sources in the Southern Sky

Research Project

Project/Area Number 02044079
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionDepartment of Physics, Kyoto University

Principal Investigator

SATO Humitaka  Department of Physics, Kyoto University, 理学部, 教授 (90025370)

Co-Investigator(Kenkyū-buntansha) STOREY J. R.  Department of Physics, University of Auckland, Professor
SAKATA Michinori  Department of Physics, Konan University, 理学部, 教授 (60068111)
YOCK P. C. M.  Department of Physics, University of Auckland, Professor
FUJII Zenjiro  Cosmic Ray Section, STE Laboratory, Nagoya University, 太陽地球環境研究所, 助手 (10022724)
MURAKI Yasushi  Cosmic Ray Section, STE Laboratory, Nagoya University, 太陽地球環境研究所, 教授 (70013430)
TESHIMA Masahiro  Institute for Cosmic Ray Research , Tokyo University, 助教授 (40197778)
FUJII Hirofumi  KEK, 助教授 (60013439)
KABE Seiji  KEK, 助教授 (10044786)
MATSUBARA Yutaka  Department of Physics, Tokyo Institute of Technology, 理学部, 助手 (80202323)
HAYASHIDA Naoaki  Institute for Cosmic Ray Research, Tokyo University, 宇宙線研究所, 助手 (50114616)
KIFUNE Tadashi  Institute for Cosmic Ray Research, Tokyo University, 宇宙線研究所, 助教授 (40011621)
NAGANO Motohiko  Institute for Cosmic Ray Research, Tokyo University, 宇宙線研究所, 教授 (00013384)
MASAIKE Akira  Department of Physics, Kyoto University, 理学部, 教授 (40022587)
堀田 直己  宇都宮大学, 教育学部, 助手 (60157039)
渡瀬 芳行  高エネルギー物理学研究所, 教授 (70018662)
三井 清美  東京大学, 宇宙線研究所, 助手 (80013340)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1990: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsSupernova / SN1987A / Ultra High Energy gamma-ray / Counter Array / Neutron Star / Magellanic Cloud / Ejecta / SN 1987A / 超高エネルギーガンマ線 / 超新星1987A / チェレンコフ光 / 空気シャワー / シンチレーション・カウンター・アレイ
Research Abstract

The supernova 1987A in the Large Magellanic Cloud has provided the first opportunity to study the emission of particles and electromagnetic radiation from a young supernova. A rapidly rotating, magnetized neutron star at the center of the expanding ejecta may be a powerful source of ultra high-energy (UHE) cosmic rays. H. Sato has pointed out that high energy gamma-rays may be produced from the decay pions generated by the collisions of hadrons accelerated by the neutron star with supernova ejecta. We installed gamma-ray detectors at the Black Birch in New Zealand (1640 m above sea level, 41゚45'S, 173゚47'E). The counter array consists of 76 scintillation detectors. The observations started on 13 October 1987. An upper limit on tile flux of UHE gamma-rays from SN1987A (>100 TeV) was obtained to be 4X10^<-14> cm^<-2> sec^<-1> from the data of 1987-1991. gamma-rays above 3 TeV emitted by SN1987A have been searched for using three, Cerenkov mirrors and data give an upper bound on the flux of 5X10^<-12> cm^<-2> sec^<-1>. Data on January 14 and 15 1988 were found to have excess counts corresponding to a flux of (1.9<plus-minus>0.5)X10^<-11> cm^<-2> sec^<-1>. The observed time of the excess coincides with the time of X-ray flare detected by the Ginga Satellite.
Recently, we have searched for UHE gamma-ray from Southern objects including Cen A, Vela X-1, Cen X-3, Cir X-1 and also several objects in the Magellanic Clouds. None of these sources shows significant excess events. The observation is still being carried out.
The moon was used to measure the angular resolution of the detector through its shadowing effect. The density of the events at the center of the moon has been found to be lower than event density near direction of the moon.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] W.H.Allen: "Search for TeV Gamma Ray Emission from Cen A, Vela X-1,Cen X-3 and Cir X-1" Proc.of 22nd International Conference on Cosmic Rays. 1. 344-347 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W.H.Allen: "Survey of UHE Gamma Ray sources in the Magellanic Clouds" Proc.of 22nd International Conference on Cosmic Rays. 1. 368-371 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W.H.Allen: "Search for UHE Gamma Ray Enission by Southen Objects" Proc.of 22nd International Conference on Cosmic Rays. 1. 376-379 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W.H.Allen: "Survey of UHE Gamma Ray Surces in Southern hemisphere" Astusphysical Journal.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W.H.Allen: "Search of UHE Gamma Ray from SN1987A" Phsical Review.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W, H. Allen et. al.: "Search for TeV Gamma Ray Emission from Cen A, Velax-1, CenX-3 and CirX-1" Proc, of 22nd International Conference on Cosmic Rays. 1. 344-347 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W, H. Allen et. al.: "Survey of UHE Gamma Ray Sources in the Magellanic clouds" Proc, of 22nd International Conference on Cosmic Rays. 1. 368-371 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W, H. Allen et. al.: "Search for UHE Gamma Ray Emission of Southern Objects." Proc, of 22nd International Conference on Cosmic Rays. 1. 376-379 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W, H. Allen et. al.: "Survey of UHE Gamma Ray Sources in Southern Hemisphere" Astrophysical Journal.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W, H. Allen et. al.: "Search for UHE Gamma Ray from SN1987A" Physical Review.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] W.H.Allen: "Search for TeV Gamma Ray Emission from Cen A,Vela X-1,Cen X-3 and Cin X-1" Proc.of 22nd International Conference on Cosmic Rays. 1. 344-347 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] W.H.Allen: "Survey of UHE Gamma Ray Sources in the Magellanic Clouds" Proc.of 22nd International Conference on Cosmic Rays. 1. 368-371 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] W.H.Allen: "Search for UHE Gamma Ray Emission by Southern Objects" Proc.of 22nd International Conference on Cosmic Rays. 1. 376-379 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] W.H.Allen: "Survey of UHE Gamma Ray Sources in Southern hemisphere" Astisphysical Journal.

    • Related Report
      1991 Annual Research Report
  • [Publications] W.H.Allen: "Search of UHE Gamma Ray from SN 1987A" Physical Reveiw.

    • Related Report
      1991 Annual Research Report
  • [Publications] 佐藤 文隆: "Light Curve of SN1987A and the Pulsar Carity Model" Progress of Theoretical Physics. 85. NO.3 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 佐藤 文隆: "超新星1987Aからの超高エネルギーγ線の探索" 学術月報. 44. NO.4 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.A.Bond: "Search for TeV Gamma Rays from CEN A and VELA Xー1" Proceedings of 21st International Cosmic Ray conference at Adelaide. 2. 271-273 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.A.Bond: "Upper Limit for Ultra High Energy γ Rays from SN1987A Obtained by Cerenkov Technique at Lange Zenith Angle" Proceedings of 21st International Cosmic Ray Conference at Adelaide. 2. 198-200 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] I.A.Bond: "A Search for Ultra High Energy Gamma Rays (>10^<14>eV) from SN1987A and ofher Sources" Proceedings of 21st International Cosmic Ray Conference at Adelaide. 2. 210-212 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 佐藤 文隆: "Search for High Energy Gamma Rays from 1987A" Institute for Cosmic Ray Research University of Tokyo, 492-512 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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