Abstract

The XEUS (X-ray Evolving Universe Spectroscopy) mission is designed to explore the X-ray emission from objects in the Universe at high red shifts. A package of instruments has been defined in some detail that allows the scientific goals of the mission to be met. It comprises narrow field imaging spectrometers of both Transition Edge Sensor (TES) and Superconducting Tunnel Junction (STJ) designs, and a Wide Field Imager with novel Silicon Active - Pixel sensing elements. We discuss the utilisation of the largest yet conceived mirror collecting area that facilitates secondary science such as high time resolution, polarimetry and extensions to high energies >10keV, and briefly mention some future trade-off studies that must be addressed.

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