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Search for neutrino point sources in the southern sky hemisphere

Research Project

Project/Area Number 13640288
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionThe University of Tokyo

Principal Investigator

TAKITA Masato  The University of Tokyo, Institute for Cosmic Ray Research, Associate Professor, 宇宙線研究所, 助教授 (20202161)

Co-Investigator(Kenkyū-buntansha) HAZUMI Masashi  High Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, Associate Professor, 素粒子原子核研究所, 助教授 (20263197)
HARA Takanori  Osaka University, Graduate School of Science, Research Associate, 理学研究科, 助手 (70283827)
OHNISHI Munehiro  The University of Tokyo, Institute for Cosmic Ray Research, Associate, 宇宙線研究所, 助手 (10260514)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2003: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥2,200,000 (Direct Cost: ¥2,200,000)
KeywordsSuper-Kamiokande / upward-going muons / atmospheric neutrinos / southern sky hemisphere / AGN / point sources
Research Abstract

We search for celetial neutrino point sources in the southern sky hemisphere by neutrino induced upward-going muon detected with the Super-Kamiokande detector. Search for neutirno signal from active galactic nuclei (AGN) is particularly interesting. The major background of atmosperic neutrino origin below 100 GeV is estimated to be 0.05 events/year. We have accumulated approximately 2000 neutirino induced upward-going muon events during 1600 detector live days from 1996 to 2001. We perform a Monte Carlo simulation as well as an analytic calculation of neutrino events, assuming AGN neutrino sources. Other analysis software are developed whenever needed. We spend our time extensively on the development of an automatic event reconstruction program of through-going and stopping muons in the Super-Kamiokande detector. The expected number of upward-going muons induced by atmospheric neutrinos is estimated to be roughly 2000 events which is reasonably consistent with the observed number. We plot the observed upward-going muon events in the celestial coordinates and study the event density distribution. We check whether there exists excess of upward-going events from acelecial point sources againt the atmospheric neutrino background events. However, we find no statistically significant excess in the southern sky hemisphere. Accordingly, we set the most stringent upper limit of 10^<-14>/cm^2/s at 90% confidence level on neutrino-induced upward-going muons from celetial point sources.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (18 results)

All 2003 Other

All Journal Article (9 results) Publications (9 results)

  • [Journal Article] THE SUPER-KAMIOKANDE DETECTOR2003

    • Author(s)
      Y.Fukuda et al.
    • Journal Title

      Nuclear Instruments and Methods A501

      Pages: 418-462

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] A SEARCH FOR PERIODIC MODULATIONS OF THE SOLAR NEUTRINO FLUX2003

    • Author(s)
      J.Yoo et al.
    • Journal Title

      Physical Review D68

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] PRECISE MEASUREMENT OF THE SOLAR NEUTRINO DAY/NIGHT AND SEASONAL VARIATION IN SUPER-KAMIOKAMDE-I2003

    • Author(s)
      M.Smy et al.
    • Journal Title

      Physical Review D69

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Atmospheric Neutrino Oscillations in SK-I2003

    • Author(s)
      A.Habig et al.
    • Journal Title

      Proc.In 28^<th> International Cosmic Ray Conference, July31-August7,Tsukuba, Japan 3

      Pages: 1255-1258

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Search for charged current tau neutrino appearance in Super-Kamiokande2003

    • Author(s)
      C.Saji et al.
    • Journal Title

      Proc.In 28^<th> International Cosmic Ray Conference, July31-August7,Tsukuba, Japan 3

      Pages: 1267-1270

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] A SEARCH FOR PERIODIC MODULATION OF THE SOLAR NEUTRINO FLUX IN SUPER-KAMIOKANDE2003

    • Author(s)
      J.Yoo et al.
    • Journal Title

      Physical Reviw D68

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] PRECISE MEASUREMENT OF THE SOLAR NEUTRINO DAY/NIGHT AND SEASONAL VARIATION IN SUPER-KAMIOKANDE-I2003

    • Author(s)
      M.B.Smy et al.
    • Journal Title

      Physical Review D69

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Atmospheric Neutrino Oscillations in SK-I2003

    • Author(s)
      A.Habig et al.
    • Journal Title

      Proc. In 28^<th> International Cosmic Ray Conference, July 31-August7, Tsukuba, Japan vol 3

      Pages: 1255-1258

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Journal Article] Search for charged current tau neutrino appearance in Super-Kamiokande2003

    • Author(s)
      C.Saji et al.
    • Journal Title

      Proc. In 28^<th> International Cosmic Ray Conference, July 31-August7, Tsukuba, Japan vol 3

      Pages: 1267-1270

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Fukuda et al.: "THE SUPER-KAMIOKAND DETECTOR"Nuclear Instruments and Methods. A501. 418-462 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] J.Yoo et al.: "A SEARCH FOR PERIODIC MODULATIONS OF THE SOLAR NEUTRINO FLUX IN SUPER-KAMIOKANDE I"Physical Review. D68. 092002 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.B.Smy et al.: "PRECISE MEASUREMENT OF THE SOLAR NEUTRINO DAY / NIGHT AND SEASONAL VARIATION IN SUPER-KAMIOKANDE-1"Physical Review. D69. 011104 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Desai et al.: "Study of Upward Showring Muons in Super-Kamiokande"Proc.in 28^<th> International Cosmic Pay Conference, July 31-August7, TsukuUa, Japan. 3. 1673-1676 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Moriyam et al.: "Characterizing the Atmospheric Neutrino Flux"Proc.in 28^<th> International Cosmic Ray Conference, July 31-August7, Tsukuba, Jappan. 3. 1263-1266 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] C.Saji et al.: "Search for charged current tau neutrino appearance in Super-Kamiokande"Proc.in 28^<th> International Cosmic Ray Conference, July 31-August7, Tsukuba, Japan. 3. 1267-1270 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Malek et al.: "Search for Supernova Relic Neutrinos at Super-Kamiokande"Physical Review Letters. 90. 061101-061105 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Fukuda et al.: "Search for Neutrinos from Gamma-ray Bursts Using Super-Kamiokande"Astrophysical Journal. 578. 317-324 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Matsuno, et al.: "A search for astronomical neutrino sources with the Super-Kamiokande detector"Proc. of ICRC2001, Hamburg, Germany, 2001. HE3. 1065-1068 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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