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Earth against the cosmic X-ray background
- Title Earth against the cosmic X-ray background
- Released 10/02/2006 3:48 pm
- Copyright (c) CESR and SPI team
This preliminary gamma-ray image has been taken by the SPI spectrometer on board Integral, during the Earth observation campaign (January-February 2006). The dark central part represents the Earth disc (about 5-7 degrees in diameter) transiting in the instrument's field of view (2.5 deg), that explains the blurred Earth rim in the image. The cosmic X-ray background radiation in the vicinity of Earth is characterised by a strong emission of high-energy (hard) X-rays.