Prof. Hartmut F.-W. Sadrozinski: Observing the sky with the Fermi gamma ray telescope
Povzetek:
Prof. Hartmut F.-W. Sadrozinski, Santa Cruz Inst. for Particle Physics, Univ. of California Santa Cruz, USA
Observing the sky with the Fermi gamma ray telescope
Investigation of gamma ray sources, pulsars, gamma-ray bursts, dark matter searches, supermassive black hole systems (AGN), cosmic ray accelerators and diffuse gamma-ray emissions with energies up to several hundred GeV, is one of the hot topics in the present day astroparticle physics. The Fermi satellite mission is now in its third year of investigating the gamma-ray sky. The experiment has two large subdetectors. A Large Area Telescope (LAT) built from position sensitive silicon detectors is used for gamma-ray imaging through pair-conversion and covers around 25% of the sky. A Gamma-Ray Monitor is a precision calorimeter built from sodium-iodide and bismuth germanium crystals which can detect bursts in the whole sky not occluded by the Earth. The Fermi mission has already catalogued more than 1450 gamma-ray sources. A few of the highlight results will be presented at the seminar and discussed.
