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Status of the CANGAROO-III Project

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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  1. 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

  2. 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

  3. CANGAROO-II 7m telescope • In operation since May 1999 • Observation 1999/2000PSR1706-44 29hRXJ1713.7-3946 23hPKS2005-489 23hPKS2155-304 58hPKS0548-322 19hCrab 63hVela 10h • Data analysis underway - results will be coming soon!

  4. CANGAROO-III • Array of four 10m telescopes in Woomera, South Australia to be operated by 2004

  5. The first 10m telescope -1 (As of May 2000)

  6. The first 10m telescope -2 • Upgraded from 7m in March 2000

  7. 10m reflector

  8. Point image size (A. Kawachi, M. Ohishi and J. Kushida)

  9. 552ch imaging camera • 3FOV • R4124UV(Hamamatsu) • 0.115 pixel • Lightguide

  10. 32 channel VME ADC • VME-9U, A24/A32, D16 • Features:・12 bit ・4ch/pC ・Min. 50ns gate・150ns internal delay

  11. 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

  12. 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

  13. 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.)

  14. Camera design • 4.2 FOV • 427 pixels • 3/4” PMT(Hamamatsu R3478UV, TTS 0.36ns) (C. Ito)

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

  16. Telescope separation study • 80~120m is not a bad choice (R. Enomoto) ☆ Figure of merit = E-2.5(effective area)/(angular resolution)

  17. Possible layout of the array 31°06’ S 136°47’ E 160m a.s.l. (J. Patterson)

  18. Sensitivity in stereo mode (Simulation assuming [optimistic] g & m rejection power of 100, and timing rejection power of 2)

  19. And in 2004… (S. Hara) CANGAROO Website http://icrhp9.icrr.u-tokyo.ac.jp

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