The Infra-Red Telescope on board the THESEUS mission
Date Issued
2018
Author(s)
Götz, D.
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Boulade, O.
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Cordier, B.
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Le Floc'h, E.
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Pinsard, F.
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Amiaux, J.
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Tourrette, T.
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Basa, S.
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Vergani, S.
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Atteia, J. L.
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•
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Tanvir, N.
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Blain, A.
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O'Brien, P.
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•
•
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Bozzo, E.
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Tenzer, C.
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Orleanski, P.
•
Abstract
The Infra-Red Telescope (IRT) on board THESEUS will play a key role in identifying and characterizing moderate to high redshift Gamma-Ray Bursts afterglows. The IRT enables the on board GRB autonomous redshift determination, thus allowing the 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 10×10 arc min imaging field of view with sub-arc second localization capabilities, and, at the same time, a 5×5 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 THESEUS SXI/XGIS instruments, and to acquire spectra for the majority of them.
Volume
89
Start page
148
Issn Identifier
0037-8720
Ads BibCode
2018MmSAI..89..148G
Rights
open.access
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