Seminario DAS: Imaging the sky in gamma rays: a window to the energetic universe

Speaker: Dr. Armelle Jardin-Blicq
Affiliation: French-Chilean Astronomical Laboratory (FCAL)

Abstract: At the far end of the electromagnetic spectrum are the most energetic photons: gamma rays can tell us about physics in exotic objects, extreme environments, and violent events. The gamma-ray domain has only been accessible for a few decades, and the detection techniques, reconstruction methods and analysis tools have grown very rapidly, allowing us to detect and study a few hundreds of sources up to the very-high-energy range (100 GeV - 100 TeV). I will present the main instruments used to observe the sky in gamma rays, and the different techniques to detect them and reconstruct their properties. Then, I will tell you about the main object of my research: gamma-ray halos.