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Earth X-ray albedo for cosmic X-ray background radiation in the 1–1000 keV band
Authors:E Churazov  S Sazonov  R Sunyaev  M Revnivtsev
Institution:Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Strasse 1, 85741 Garching, Germany;Space Research Institute (IKI), Profsoyuznaya 84/32, Moscow 117997, Russia
Abstract:We present calculations of the reflection of the cosmic X-ray background (CXB) by the Earth's atmosphere in the 1–1000 keV energy range. The calculations include Compton scattering and X-ray fluorescent emission and are based on a realistic chemical composition of the atmosphere. Such calculations are relevant for CXB studies using the Earth as an obscuring screen (as was recently done by INTEGRAL ). The Earth's reflectivity is further compared with that of the Sun and the Moon – the two other objects in the Solar system subtending a large solid angle on the sky, as needed for CXB studies.
Keywords:scattering  Sun: X-rays  gamma rays  Earth  X-rays: diffuse background  X-rays: general
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