The excess of gamma rays in the data measured by the Fermi Large Area Telescope from the Galactic center region is one of the most intriguing mysteries in Astroparticle Physics. This Galactic center excess (GCE), has been measured with respect to different interstellar emission models, source catalogs, data selections and techniques. Although several proposed interpretations have appeared in...
The Transient High-Energy Sky and Early Universe Surveyor (THESEUS) is a space mission
concept currently under Phase A study by ESA as candidate M5 mission, aiming at exploiting
Gamma-Ray Bursts for investigating the early Universe and at providing a substantial
advancement of multi-messenger and time-domain astrophysics. Through an unprecedented
combination of X-/gamma-rays monitors, an...