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Poster GA:10. International Symposium on High Energy Gamma-Ray Astronomy, June 26-30, Heidelberg. Status of the CANGAROO-III Project. Masaki Mori ICRR, University of Tokyo. CANGAROO collaboration. C ollaboration of A ustralia and N ippon for a Ga mma R ay O bservatory in the O utback.

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Status of the CANGAROO-III Project

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Status of the cangaroo iii project l.jpg

Poster GA:10

International Symposium on High Energy Gamma-Ray Astronomy, June 26-30, Heidelberg

Status of the CANGAROO-III Project

Masaki Mori

ICRR, University of Tokyo


Cangaroo collaboration l.jpg

CANGAROO collaboration

  • Collaboration of Australia and Nippon for a Gamma Ray Observatory in the Outback

  • Institute for Cosmic Ray Research, U. Tokyo

  • University of Adelaide

  • Australian National University

  • Ibaraki University

  • Ibaraki Prefectural University of Health Science

  • Institute of Space and Astronautical Science

  • Institute of Physical and Chemical Research (RIKEN)

  • Kanagawa University

  • Konan University

  • Kyoto University

  • National Astronomical Observatory of Japan

  • Osaka City University

  • STE Laboratory, Nagoya University

  • Tokai University

  • Tokyo Institute of Technology

  • Yamagata University

  • Yamanashi Gakuin University


Cangaroo ii 7m telescope l.jpg

CANGAROO-II 7m telescope

  • In operation since May 1999

  • Observation 1999/2000PSR1706-4429hRXJ1713.7-394623hPKS2005-48923hPKS2155-30458hPKS0548-32219hCrab63hVela10h

  • Data analysis underway - results will be coming soon!


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CANGAROO-III

  • Array of four 10m telescopes in Woomera, South Australia to be operated by 2004


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The first 10m telescope -1

(As of May 2000)


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The first 10m telescope -2

  • Upgraded from 7m in March 2000


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10m reflector


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Point image size

(A. Kawachi, M. Ohishi and J. Kushida)


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552ch imaging camera

  • 3FOV

  • R4124UV(Hamamatsu)

  • 0.115 pixel

  • Lightguide


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32 channel VME ADC

  • VME-9U, A24/A32, D16

  • Features:・12 bit ・4ch/pC ・Min. 50ns gate・150ns internal delay


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Observations in 2000

  • March: Vela pulsar / PSR1259-63

  • April: SN1006

  • May: SN1006

  • June: PSR1706-44

  • …analysis using, and development of, unified software package in progress


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Schedule

  • FY2000: production of the 2nd telescope

  • FY2001: installation of the 2nd telescope /start of stereo observation /production of the 3rd telescope

  • FY2002: installation of the 3rd telescope /production of the 4th telescope

  • FY2003: installation of the 4th telescope /start of observation by the full array


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Work in progress

  • Refinement of mirror optical quality

  • Wider FOV camera with individually HV-controlled PMTs

  • Front-end electronics in VME-9U

  • Faster data readout

  • Pattern trigger circuit using PLD

  • Flexible, centralized telescope control

  • Total monitor system (calibration light source, environment etc.)


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Camera design

  • 4.2 FOV

  • 427 pixels

  • 3/4” PMT(Hamamatsu R3478UV, TTS 0.36ns)

(C. Ito)


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Electronics

  • VME-based・Discriminator /scaler・TDC・ADC・Trigger・CPU(Solaris or VxWorks)


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Telescope separation study

  • 80~120m is not a bad choice

(R. Enomoto)

☆ Figure of merit = E-2.5(effective area)/(angular resolution)


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Possible layout of the array

31°06’ S

136°47’ E

160m a.s.l.

(J. Patterson)


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Sensitivity in stereo mode

(Simulation assuming [optimistic] g & m rejection power of 100, and timing rejection power of 2)


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And in 2004…

(S. Hara)

CANGAROO Website http://icrhp9.icrr.u-tokyo.ac.jp


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