Speaker
Description
The Compton Spectrometer and Imager (COSI) is a gamma-ray telescope in low-Earth orbit selected by NASA as a Small Explorer satellite mission to be launched in 2027. COSI employs a novel Compton telescope, consisting of a compact array of cross-strip germanium detectors. Owing to its wide field-of-view and excellent energy resolution, COSI will achieve an unprecedented sensitivity in the 0.2-5 MeV energy band.
Low-energy gamma-ray satellites are highly dominated by background. Developing a physical understanding and an accurate model of the background is therefore key to maximizing the instrument's sensitivity. In this talk, I will present the full bottom-up simulations of the gamma-ray background computed for the new COSI data challenge. This background model will be use for the spectral fit and image deconvolution algorithms presented in this data challenge. It will also allow us to study the variability and the expected internal background induced by the activation of the spacecraft materials.
In addition, I will present the background simulations for the 2016 COSI Balloon flight and its comparison with the data.
| Collaboration(s) | COSI |
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