The Athena Observatory L2 orbit Ariane V Mass < 5100 kg Power 2500 W 5 year mission X-ray Integral Field Unit:  E: 2.5 eV Field of View: 5 arcmin Operating temp: 50 mk Wide Field Imager:  E: 125 eV Field of View: 40 arcmin High countrate capability Silicon Pore Optics: 2 m 2 at 1 keV 5 arcsec HEW Focal length: 12 m Sensitivity: 3 10 -17 erg cm -2 s -1 Rau et al.
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