An array of four 10m Cherenkov telescopes in Woomera, Australia for efficient observation of celestial gamma-rays in the 100 GeV region

Now the full array of four telescopes are in operation since March 2004 New!

Construction of the fourth telescope completed in July 2003

Construction of the third telescope completed in Dec.2002

Construction album of the second telescope in 2002

(Four telescopes at dawn: March 2004)

By observing Cherenkov images of gamma-ray showers simultaneously with more than one telescope (stereo mode), we can determine the direction of gamma-rays accurately as crossing points of image axes. Thus we can explore the spatial structure of the gamma-ray objects as well as discriminating backgroud cosmic-ray showers more easily. Moreover, the energy resolution of gamma-rays are improved knowing the production height of Cherenkov light. The second, third and fourth telescopes will be installed in 2001, 2002 and 2003, respectively.

Stereo observation of Cherenkov images

Brochure [html, PDF] (Updated May 8, 2000)

Proposal (in Japanese) [gzipped PS, PDF]