Comparison plots are available in Table 3 below. The traces overlay extremely well, and are essentially interchangeable. The CM calibration files are not the same files as those posted on the Cal Group Web Page above. Hence the planning results should give a very similar set of results to those derived during subsequent analysis of real data, if the inputs supplied are accurate. These files are subject to change upon updating of any of the Chandra configuration-managed calibration data.
All effective areas are for both positive and negative orders summed together.
The curves use the flight instrument chip layout properly accounting for both FI and BI chips. Since the energy response and spectral resolution of the two grating assemblies differ, separation of the output may be important for some observers. In all cases the output is for isolated first order. The energy resolution of the ACIS instrument will allow the user to separate this from the higher order light. See the Chandra Proposers' Observatory Guide for more information.