HRC-I Quantum Efficiencey Verification
using White Dwarf HZ 43
K. Tabetha Hole, Deron Pease, Hank Donnelly
For this study we employed the hot white dwarf HZ 43 (ObsID 1514) to perform HRC-I on-axis QE calibration/confirmation over the low energy range 0.065 - 0.20 keV.
The predicted counts with total model uncertainties are:
14060 ± 15.0% - MB
11610 ± 15.0% - DF
The background-subtracted observed counts are: 7752 ± 1.2%
With the MB model the HRC-I sees 81.4% less (absolute
difference) than predicted by the model. With the DF model the HRC-I sees
49.8% less than predicted by the model. Clearly, over this
low energy regime the HRC-I QE model is currently too high, and must be
modified (lowered) to match the predicted and observed within allowed uncertainties.
Last modified: 09/25/12
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