The XGIS instrument on-board THESEUS: Monte Carlo simulations for response, background, and sensitivity

Riccardo Campana; Fabio Fuschino; Claudio Labanti; Sandro Mereghetti; Enrico Virgilli; Valentina Fioretti; Mauro Orlandini; John Buchan Stephen; Lorenzo Amati

doi:10.1117/12.2560981

13 December 2020 The XGIS instrument on-board THESEUS: Monte Carlo simulations for response, background, and sensitivity

Riccardo Campana, Fabio Fuschino, Claudio Labanti, Sandro Mereghetti, Enrico Virgilli, Valentina Fioretti, Mauro Orlandini, John Buchan Stephen, Lorenzo Amati

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Proceedings Volume 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray; 114448P (2020) https://doi.org/10.1117/12.2560981
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

The response of the X and Gamma Imaging Spectrometer (XGIS) instrument onboard the Transient High Energy Sky and Early Universe Surveyor (THESEUS) mission, selected by ESA for an assessment phase in the framework of the Cosmic Vision M5 launch opportunity, has been extensively modelled with a Monte Carlo Geant-4 based software. In this paper, the expected sources of background in the Low Earth Orbit foreseen for THESEUS are described (e.g. diffuse photon backgrounds, cosmic-ray populations, Earth albedo emission) and the simulated on-board background environment and its effects on the instrumental performance is shown.

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Riccardo Campana, Fabio Fuschino, Claudio Labanti, Sandro Mereghetti, Enrico Virgilli, Valentina Fioretti, Mauro Orlandini, John Buchan Stephen, and Lorenzo Amati "The XGIS instrument on-board THESEUS: Monte Carlo simulations for response, background, and sensitivity", Proc. SPIE 11444, Space Telescopes and Instrumentation 2020: Ultraviolet to Gamma Ray, 114448P (13 December 2020); https://doi.org/10.1117/12.2560981

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