Authors: Emanuele Perinati Chris Tenzer Andrea Santangelo Konrad Dennerl Michael Freyberg Peter Predehl
Publish Date: 2011/12/07
Volume: 33, Issue: 1, Pages: 39-53
Abstract
The pnCCD cameras at the focal plane of the eROSITA space observatory will be the first Xray 02–12 keV detector to operate in a L2 orbit Therefore no direct information of instrumental non Xray background NXB is available to make predictions for eROSITA Since in general the instrumental NXB experienced in orbit has a major impact on the overall sensitivity of the cameras we investigated and modeled the L2 radiation environment and its interaction with the eROSITA mass distribution and cameras in order to quantify the expected pnCCD NXB level We obtain an average value of NXB ∼25 lower than that observed by the pnCCDs onboard the XMMNewton satellite which is placed in a Highly Elliptical Orbit HEO We discuss this result in light of the differences between the L2 and HEO space environments
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