Pittsburg State University
Department of Physics
Monday, November 23, 2009
Imaging the Universe in High-Energy Gamma-rays
Gamma rays have proven to be very powerful tracers of populations of high-energy particles produced in the non-thermal universe, via their interactions with interstellar matter or with radiation fields. Among all different techniques developed so far for their detection, ground-based Cherenkov telescopes have succeeded in providing catalogue of very high-energy (above hundred GeV) gamma-ray sources with reliable source detection and spectral measurements. In my talk I will begin with a brief introduction to a state-of-the-art instrumentation and observational technique, which then will be followed by a few illustrative examples of astrophysical scenarios of gamma-ray emission mechanisms in a binary system, supernova remnant, and active galactic nucleus.