Rico Bürgler, Gina Bossert

Gamma Ray Telescope on the ground

Rico Bürgler, Gina Bossert

-What are gamma rays?-Gamma ray sources -Cherenkov-Radiation-Examples of

Rico Bürgler, Gina Bossert

>100keV

Rico Bürgler, Gina Bossert

most luminous gamma-ray pulsar ever found

Rico Bürgler, Gina Bossert

black hole being born 12.8 billion light years away Swift Telescope, NASA

Rico Bürgler, Gina Bossert

Rico Bürgler, Gina Bossert

Rico Bürgler, Gina Bossert

Ground Telescope

Fermi Telescope

Cherenkov radiation

● Speed of light in vacuum: c = 2.998E8 m/s

● Speed of light in air: c air = c/n air = c/1.0003 = 0.9997c

Rico Bürgler, Gina Bossert

● How are those showers detected? − Cherenkov telescopes − Air Shower arrays

Rico Bürgler, Gina Bossert

For example AGASA(Akeno Giant Air Shower Array) 
located in Tokyo, which covers an area of 100km2).

Air Shower Arrays

Rico Bürgler, Gina Bossert

Comparison

Rico Bürgler, Gina Bossert

The following slides are not relevant for the presentation. They just contain additional information and answer smaller questions.

● VHE Cherenkov telescopes in (future) use: − H.E.S.S. at Namibia − MAGIC at La Palma − VERITAS at Arizona − MACE at India, under construction