The Athena space X-ray Observatory and the astrophysics of hot plasma
A. Rau, et al.
The Wide Field Imager (WFI) is one of the two scientific instruments proposed for the Athena X-ray observatory.
It will provide imaging in the 0.1-15 keV band over a wide field, simultaneously with spectrally and time-resolved photon counting.
The instrument is designed to make optimal use of the grasp (collecting area times solid angle product) provided by the optical design of the Athena mirror system, by combining a sensitive approx. 40’ diameter field of view DEPFET detector with a pixel size properly sampling the angular resolution of 5” on-axis (half energy width).