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Communication Dans Un Congrès Année : 2018

The Infra-Red Telescope on board the THESEUS mission

Résumé

The Infra-Red Telescope (IRT) on board the Transient High Energy Sky and Early Universe Surveyor (THESEUS) ESA M5 candidate mission will play a key role in identifying and characterizing moderate to high redshift Gamma-Ray Bursts afterglows. The IRT is the enabling instrument on board THESEUS for measuring autonomously the redshift of the several hundreds of GRBs detected per year by the Soft X-ray Imager (SXI) and the X- and Gamma-Ray Imaging Spectrometer (XGIS), and thus allowing the big ground based telescopes to be triggered on a redshift pre-selected sample, and finally fulfilling the cosmological goals of the mission. The IRT will be composed by a primary mirror of 0.7 m of diameter coupled to a single camera in a Cassegrain design. It will work in the 0.7-1.8 {\mu}m wavelength range, and will provide a 10x10 arc min imaging field of view with sub-arc second localization capabilities, and, at the same time, a 5x5 arc min field of view with moderate (R up to ~500) spectroscopic capabilities. Its sensitivity, mainly limited by the satellite jitter, is adapted to detect all the GRBs, localized by the SXI/XGIS, and to acquire spectra for the majority of them.

Dates et versions

hal-02058528 , version 1 (06-03-2019)

Identifiants

Citer

D. Götz, O. Boulade, B. Cordier, E. Le Floc'H, F. Pinsard, et al.. The Infra-Red Telescope on board the THESEUS mission. THESEUS Workshop 2017, Oct 2017, Naples, Italy. pp.148-156. ⟨hal-02058528⟩
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