High-energy astrophysics research is based on two complementary methodologies. atellite observations, such as those performed by the AGILE and the large area telescope on board the Fermi space mission, cover the energy band from scores of MeV up to hundreds of GeV. Observations in this band are related mainly to compact objects like neutron stars and galactic or extra-galactic black holes. Observations of the galaxy in gamma rays enables us to obtain interesting information regarding matter and interstellar radiation thanks to interactions between cosmic rays. At higher energies, the technique consists of observin from the earth the electromagnetic showers produced by photons in the upper atmosphere. The scientific goals of the two methods are therefore complementary.

The Trieste group has roles of responsability in both the experiment techniques

In AGILE and Fermi-LAT the Montecarlo simulation SW was developed and is currently maintened by researchers from Trieste. In the two space gamma-ray experiments, the group is interested mainly in transient sources, as Gamma-ray Bursts (GRB), Solar Flares and Terrestrial Gamma-ray Flashes. Researchers from the group were and are currently international responsibles of the Science Working groups on these sources.

Within MAGIC, the group collaborates to the daily monitor of Fermi data on extragalactic gamma-ray sources such as Active Galactic Nuclei or GRBs.

The group is collaborating to a new experiment, eASTROGAM, whose main scientific goals are the observation of gamma-ray sources and diffuse emission in the range from 300 keV up to GeV energies.

The gamma-ray group recently joined also the CTA collaboration, aiming to build an array of Gamma-ray Imaging Cherenkov Telescopes.