AMATI, LORENZOLORENZOAMATIO'Brien, Paul T.Paul T.O'BrienGötz, DiegoDiegoGötz2020-09-082020-09-082016978151061913597815106018950277-786Xhttp://hdl.handle.net/20.500.12386/27195The Transient High Energy Sky and Early Universe Surveyor (THESEUS) is a mission concept under development by a large international collaboration aimed at exploiting gamma-ray bursts for investigating the early Universe. The main scientific objectives of THESEUS include: investigating the star formation rate and metallicity evolution of the ISM and IGM up to redshift 9-10, detecting the first generation (pop III) of stars, studying the sources and physics of re-ionization, detecting the faint end of galaxies luminosity function. These goals will be achieved through a unique combination of instruments allowing GRB detection and arcmin localization over a broad FOV (more than 1sr) and an energy band extending from several MeVs down to 0.3 keV with unprecedented sensitivity, as well as on-board prompt (few minutes) follow-up with a 0.6m class IR telescope with both imaging and spectroscopic capabilities. Such instrumentation will also allow THESEUS to unveil and study the population of soft and sub-energetic GRBs, and, more in general, to perform monitoring and survey of the X-ray sky with unprecedented sensitivity.STAMPAenConference paper10.1117/12.22315252-s2.0-85003434354000387731500044https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9905/1/The-Transient-High-Energy-Sky-and-Early-Universe-Surveyor-THESEUS/10.1117/12.2231525.short?SSO=12016SPIE.9905E..1MAFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering