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Ajello, M; Greiner, J; Sato, G; Willis, D. R; Kanbach, G; Strong, A. W; Diehl, R; Hasinger, G; Gehrels, N; Markwardt, C. B; Tueller, J
The Astrophysical journal, 12/2008, Letnik: 689, Številka: 2Journal Article
We use Swift BAT Earth occultation data at different geomagnetic latitudes to derive a sensitive measurement of the cosmic X-ray background (CXB) and of the Earth albedo emission in the 15-200 keV band. We compare our CXB spectrum with recent (INTEGRAL, BeppoSAX) and past results (HEAO-1) and find good agreement. Using an independent measurement of the CXB spectrum we are able to confirm our results. This study shows that the BAT CXB spectrum has a normalization image larger than the HEAO-1 measurement. The BAT accurate Earth albedo spectrum can be used to predict the level of photon background for satellites in low Earth and mid inclination orbits.
