The MAGIC-II gamma-ray stereoscopic telescope system

MAGIC-II is a stereoscopic system of imaging atmospheric Cherenkov telescopes (IACT) with the two largest dishes in the world. It is located in the Canary island of La Palma. The second 17 m diameter telescope is currently under commissioning. MAGIC with its large reflector area, high quantum efficiency photomultipliers, optical signal transmission and fast digitization, will benefit from an improved shower reconstruction and increased background rejection thanks to the simultaneous observation by using two telescopes. Compared with the single MAGIC telescope, the new system will offer an improvement of 20% in the angular resolution and an enhancement from 25% to 15% in the energy resolution, above few hundreds GeV. It is also expected that the sensitivity improves by factor ∼ 2 – 3 , reaching 1% of the Crab nebula flux in the full energy range (60 Gev–20 TeV).