Proceedings of the 6. International Meeting on High Energy Gamma-Ray Astronomy

Following the tradition of past Symposia, the 2016 meeting covered all major observational and theoretical aspects of the field with an emphasis on the high (GeV) and very high (TeV) energy intervals of the electromagnetic spectrum. Scientific topics addressed ranged from the origin of galactic and extragalactic cosmic rays to the physics and astrophysics of compact objects (Pulsars, Microquasars, AGN) and their relativistic outflows, as well as to cosmological issues related to Dark Matter, Intergalactic radiation and magnetic fields, and topics relevant to fundamental physics. (authors)