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

Götz, D.; Basa, S.; Pinsard, F.; Martin, Laurent; Arhancet, Axel; Bozzo, E.; Cara, C.; Sanz, I. Escudero; Frugier, Pierre-Antoine; Floriot, Johan; Genolet, L.; Hedderman, Paul; Floc’h, E. Le; Mer, I. Le; Paltani, S.; Pamplona, Tony; Paries, Céline; Prod’homme, Thibaut; Schneider, Benjamin; Tenzer, C.; Tourrette, Thierry; Triou, Henri

doi:10.1117/12.2561435

Cited by 9 publications

(7 citation statements)

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“… InfraRed Telescope (IRT, 0.7 -1.8 ), an off-axis Korsch telescope with 0.7 m primary mirror granting a FOV of at least 15x15 arcmin and 1 arc sec source location accuracy, providing imaging capabilities in five NIR filters (I, Z, Y, J, H) and moderate (R~400 at 1.1) slit-less spectroscopy in 0.8 -1.6 over a 2x2 arc min FOV 6 .…”

Section: Scientific Payload and Spacecraft Designmentioning

confidence: 99%

The THESEUS space mission concept: science case, design and expected performances

Amati

O’Brien

Götz

et al. 2018

Advances in Space Research

174

137

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THESEUS is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics. These goals will be achieved through a unique combination of instruments allowing GRB and X-ray transient detection over a broad field of view (more than 1sr) with 0.5-1 arcmin localization, an energy band extending from several MeV down to 0.3 keV and high sensitivity to transient sources in the soft X-ray domain, as well as on-board prompt (few minutes) followup with a 0.7 m class IR telescope with both imaging and spectroscopic capabilities. THESEUS will be perfectly suited for addressing the main open issues in cosmology such as, e.g., star formation rate and metallicity evolution of the inter-stellar and intra-galactic medium up to redshift ∼10, signatures of Pop III stars, sources and physics of reionization, and the faint end of the galaxy luminosity function. In addition, it will provide unprecedented capability to monitor the X-ray variable sky, thus detecting, localizing, and identifying the electromagnetic counterparts to sources of gravitational radiation, which may be routinely detected in the late '20s / early '30s by next generation facilities like aLIGO/ aVirgo, eLISA, KAGRA, and Einstein Telescope. THESEUS will also provide powerful synergies with the next generation of multi-wavelength observatories (e.g., LSST, ELT, SKA, CTA, ATHENA).

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Section: Scientific Payload and Spacecraft Designmentioning

confidence: 99%

The THESEUS space mission concept: science case, design and expected performances

Amati

O’Brien

Götz

et al. 2018

Advances in Space Research

174

137

View full text Add to dashboard Cite

show abstract

“…• an Infrared Telescope (IRT 4 ) with 70 cm aperture, providing both imaging and spectroscopy (R∼400) capabilities in the 0.7-1.8 µm range;…”

Section: Introductionmentioning

confidence: 99%

Scientific simulations and optimization of the XGIS instrument on board THESEUS

Mereghetti¹,

Ghirlanda²,

Salvaterra³

et al. 2021

Preprint

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The XGIS (X and Gamma Imaging Spectrometer) is one of the three instruments onboard the THESEUS mission (ESA M5, currently in Phase-A). Thanks to its wide field of view and good imaging capabilities, it will efficiently detect and localize gamma-ray bursts and other transients in the 2-150 keV sky, and also provide spectroscopy up to 10 MeV. Its current design has been optimized by means of scientific simulations based on a Monte Carlo model of the instrument coupled to a state-of-the-art description of the populations of long and short GRBs extending to high redshifts. We describe the optimization process that led to the current design of the XGIS, based on two identical units with partially overlapping fields of view, and discuss the expected performance of the instrument.

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“…The use of the Lobster Eye concept allows an unprecedented combination of large FoV (0.5 sr), source location accuracy (< 1-2 arcmin). The SXI and XGIS triggers on transient events are exploited by the third instrument of THESEUS, the near Infra-Red Telescope 8,9 (IRT) which is composed by a primary mirror of 0.7 m of diameter and a secondary mirror of 0.23 m in a Cassegrain configuration. In imaging mode the IRT has a FoV of 15 × 15 .…”

Section: Introductionmentioning

confidence: 99%

The XGIS instrument on-board THESEUS: the detection plane and on-board electronics

Fuschino¹,

Campana²,

Labanti³

et al. 2021

Preprint

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The X and Gamma Imaging Spectrometer instrument on-board the THESEUS mission (selected by ESA in the framework of the Cosmic Vision M5 launch opportunity, currently in phase A) is based on a detection plane composed of several thousands of single active elements. Each element comprises a 4.5×4.5×30 mm 3 CsI(Tl) scintillator bar, optically coupled at both ends to Silicon Drift Detectors (SDDs). The SDDs acts both as photodetectors for the scintillation light and as direct X-ray sensors. In this paper the design of the XGIS detection plane is reviewed, outlining the strategic choices in terms of modularity and redundancy of the system. Results on detector-electronics prototypes are also described. Moreover, the design and development of the lownoise front-end electronics is presented, emphasizing the innovative architectural design based on custom-designed Application-Specific Integrated Circuits (ASICs).

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

Cited by 9 publications

References 0 publications

The THESEUS space mission concept: science case, design and expected performances

The THESEUS space mission concept: science case, design and expected performances

Scientific simulations and optimization of the XGIS instrument on board THESEUS

The XGIS instrument on-board THESEUS: the detection plane and on-board electronics

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