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Image 10 of 13

To compare the data in CC vs. TE mode, we plot the spectra of data integrated over CHIPY. The CTI corrector uses the default value of CHIPY in the event list, therefore for TE data, it uses the real value of CHIPY and for CC data it essentially uses a random number between 1 and 512 for CHIPY as the value recorded in the CHIPY column has nothing to do with the Y position of the event in the chip.

This figure shows the observed spectrum of the Ext Cal Source on S2 in TE mode (black line : ObsID 60991) and CC mode (green line : ObsID 60993) in the PHA space.