# XRT High-Energy Optics Simulation
*analysis-service . products*

XRT High-Energy Optics Simulation is cosine's Geant4-based software tool for simulating X-ray and gamma-ray imaging systems, surface scattering, metrology models, and detector-plane image patterns.

## Specifications
- **product status**: operational
- **manufacturer**: cosine
- **analysis service**: {"processing_capabilities":["X-ray optics simulation","gamma-ray optics simulation","surface scattering modelling","high-energy telescope performance prediction"]}
- **deployment context**: ground
- **entity type**: analysis_service
- **last verified date**: 2026-06-10
- **verified by**: sw
- **claim status**: unclaimed
- **provider**: cosine
- **attributes**: {"kind":"analysis-service","product_status":"operational","manufacturer":"cosine","description":"XRT High-Energy Optics Simulation is cosine's Geant4-based software tool for simulating X-ray and gamma-ray imaging systems, surface scattering, metrology models, and detector-plane image patterns.","sensor":null,"bus":null,"ground_segment":null,"launcher":null,"analysis_service":"{\"processing_capabilities\":[\"X-ray optics simulation\",\"gamma-ray optics simulation\",\"surface scattering modelling\",\"high-energy telescope performance prediction\"]}","deployment_context":"ground"}
- **relevance**: ancillary

## Editorial
XRT High-Energy Optics Simulation (also marketed as XRTG4) is a Geant4-based Monte Carlo ray-tracing software tool from cosine for simulating X-ray and gamma-ray imaging systems.[^cosine-xrt-case] The software models X-ray optics surface scattering, metrology input models, and detector-plane image patterns, enabling prediction of telescope point-spread functions and effective area curves during instrument design.[^xrt-arxiv] It has been applied to programmes including XMM-Newton, IXO, and ATHENA Silicon Pore Optics development, as well as synchrotron beamline design.[^cosine-xrt-case][^cosine-simulations] XRTG4 is distributed as a PC-based software package accompanied by training, and cosine offers simulation services alongside the tool itself.[^cosine-xrt-case] The software supports development of future space instruments that will operate at X-ray wavelengths; it does not process Earth observation imagery or deliver geophysical products directly.[^cosine-xrt-case]

## Sources
- [cosine-xrt-case] | XRT High-Energy Optics Simulation - cosine case study | https://www.cosine.eu/cases/xrt-high-energy-optics-simulation/ | tier=operator-marketing | accessed=2026-06-10
- [cosine-simulations] | Simulations - cosine technology page | https://www.cosine.eu/technology/simulations/ | tier=operator-marketing | accessed=2026-06-10
- [xrt-arxiv] | X-ray tracing using Geant4 - arxiv 2008 | https://arxiv.org/pdf/0810.1273 | tier=peer-reviewed | accessed=2026-06-10

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Source: https://eo-atlas.org/products/analysis-service/xrt-high-energy-optics-simulation
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