Study of the VHE $\gamma$-ray emission from the Active Galactic Nucleus 1ES1959+650

The AGN 1ES1959+650 is a variable gamma-ray source that was observed with the Cherenkov telescopes HEGRA CT1 and MAGIC. The analysis of the data and results are presented in this work. In spring 2002 CT1 has observed 1ES1959+650 during a period of high gamma-ray activity, with the detection of a so-called ‘orphan flare’. The spectrum of the source obtained in this analysis covers a range between 1 TeV to 15 TeV. The MAGIC telescope is a new generation Cherenkov telescope with low energy threshold. Its 236 square meters reflecting surface is composed of elements made of Aluminum alloy. In this work, measurements and tests performed on the mirror elements are described. In September 2004 the AGN 1ES1959+650 was observed with the MAGIC telescope. The spectrum of the source was measured down to 200 GeV when the source was in a low, quiescent state. The measurements have been compared with emission models.