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The FWHM of a Mn-Kalpha line as a function of the line centroid. While CTI and FWHM should go hand-in-hand, the relationship is clearly complicated, possibly device- and environment-specific.
The counts in the Mn-Kalpha line as a function of time. Most obvious is the decline in counts due to the radioactive decay of the Fe-55 sources (half-life of 2.73 years). The ACIS source is much brighter, at least initially, but both sources suffer from increasingly low signal to noise as the missions continue.
The counts in the Mn-Kalpha line, after removing the 2.74 year Fe-55 half-life, as a function of time. (Not sure the paper needs this one.)
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