The Infra-Red Telescope (IRT) on board the THESEUS mission

17 Feb 2021  ·  Diego Götz, Stéphane Basa, Frédéric Pinsard, Laurent Martin, Axel Arhancet, Enrico Bozzo, Christophe Cara, Isabel Escudero Sanz, Pierre-Antoine Frugier, Johan Floriot, Ludovic Genolet, Paul Heddermann, Emeric Le Floc'h, Isabelle Le Mer, Stéphane Paltani, Tony Pamplona, Céline Paries, Thibaut Prod'homme, Benjamin Schneider, Chris Tenzer, Thierry Tourrette, Henri Triou ·

The Infra-Red Telescope (IRT) is part of the payload of the THESEUS mission, which is one of the two ESA M5 candidates within the Cosmic Vision program, planned for launch in 2032. The THESEUS payload, composed by two high energy wide field monitors (SXI and XGIS) and a near infra-red telescope (IRT), is optimized to detect, localize and characterize Gamma-Ray Bursts and other high-energy transients. The main goal of the IRT is to identify and precisely localize the NIR counterparts of the high-energy sources and to measure their distance. Here we present the design of the IRT and its expected performance.

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Instrumentation and Methods for Astrophysics