Lecture
This lecture explores the field of multimessenger astrophysics, focusing on cosmic rays, neutrinos, and gamma rays. It covers the connection between different observational windows, such as particles, electromagnetic radiation, and gravitational waves. The lecture delves into topics like the cosmic ray energy spectrum, astrophysical particle accelerators, and the detection of cosmic rays with telescopes. It also discusses the Alpha Magnetic Spectrometer, the Cerenkov Telescope Array, and the IceCube Neutrino Observatory. The lecture concludes with a detailed analysis of the detection of neutrinos from a BL Lac object and the experimental quest to detect relic neutrinos from the Big Bang.