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To confirm the source of the quantum efficiency reduction, here is the same plot, but for fits from the data in the lower corners of the CCD - closest to the framestore. There is no reduction in quantum efficiency for these data, indicating that the drop is due to increased CTI. Increased CTI leads to more charge trailing and more events morphing from acceptible to bad grades. CTI correction (the default in standard processing but not used here), would remove most of the QE drop.
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May 4, 2011 - Bev
XIS peak location vs Cut Off Rigidity for recent times (201101).
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For November 2006:
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May 4, 2011 - Catherine
The plots from my IACHEC talk which are possibly paper-worthy plus some text.
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