Absolute effective areas of the HETGS

Norbert S. Schulz; Daniel Dewey; Herman L. Marshall

doi:10.1117/12.331234

19 November 1998 Absolute effective areas of the HETGS

Norbert S. Schulz, Daniel Dewey, Herman L. Marshall

Proceedings Volume 3444, X-Ray Optics, Instruments, and Missions; (1998) https://doi.org/10.1117/12.331234
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

XRCF measurements of the flight AXAF High Energy Transmission Grating Spectrometer throughput were used to determine absolute effective areas. The result are compared with component models of the HRMA, HETG and the ACIS-S. The comparison provides an independent view on HETG efficiencies as well as the detector efficiencies along the dispersion direction. Using the XRCF double crystal monochromator measurements in the range from 0.9 to 8.7 keV, the effective areas in the 1st order MEG were determined with an accuracy of better than 10 percent, in the 1st order HEG better than 15 percent throughout most of the energy range. This is within the goal set for the XRCF measurements to refine state of the art composite component model predictions, which in the future will allow us to draw conclusions on the in-flight HETGS absolute effective area.

Citation Download Citation

Norbert S. Schulz, Daniel Dewey, and Herman L. Marshall "Absolute effective areas of the HETGS", Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); https://doi.org/10.1117/12.331234

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