ExoSim 2: the new exoplanet observation simulator applied to the Ariel space mission

Mugnai, Lorenzo V. ORCID: https://orcid.org/0000-0002-9007-9802, Bocchieri, Andrea and Pascale, Enzo ORCID: https://orcid.org/0000-0002-3242-8154 2024. ExoSim 2: the new exoplanet observation simulator applied to the Ariel space mission. Presented at: SPIE Astronomical Telescopes + Instrumentation, Yokohama, Japan, 16-22 June 2024. Published in: Coyle, Laura E., Perrin, Marshall D. and Matsuura, Shuji eds. Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave. Washington: SPIE, 10.1117/12.3019036

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Abstract

ExoSim 2 is the next generation of the Exoplanet Observation Simulator (ExoSim), designed for spectrophotometric observations of transiting exoplanets from space, ground, and sub-orbital platforms. Implemented in Python 3, it uses object-oriented design principles, allowing extensive customization and extension. Featuring a modular architecture with Task classes, ExoSim 2 encapsulates simulation algorithms, providing flexibility and extensibility. The Signal class manages data in a structured cube format, incorporating temporal, spatial, and spectral dimensions, enabling accurate simulation of observational data across various conditions and instrument configurations. The workflow consists of three main steps: creating focal planes, producing subexposures, and generating non-destructive reads (NDRs). This structure optimizes computational efficiency and resource management, facilitating detailed simulations. ExoSim 2 has been validated against tools like ArielRad, demonstrating accuracy in photon conversion efficiency, saturation time, and signal generation. It has also been tested for instantaneous read-out and jitter simulation, confirming its robustness. Applied to the Ariel mission, ExoSim 2 simulates raw observational data, aiding in mission preparation, instrument design, and observational strategy optimization. Its adaptability makes it a valuable tool for various missions beyond Ariel. ExoSim 2 represents a significant advancement in exoplanet observation simulation, providing researchers with a powerful tool to enhance understanding of exoplanetary systems and optimize the use of observational resources.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Publisher:	SPIE
ISBN:	9781510675070
ISSN:	0277-786X
Date of First Compliant Deposit:	6 November 2024
Date of Acceptance:	23 August 2024
Last Modified:	18 Nov 2024 10:16
URI:	https://orca.cardiff.ac.uk/id/eprint/173678

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