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The HRI detector performance is characterized by several parameters. These are the field of view, the detector quantum efficiency, the window transmission, the sources of background, the spatial and temporal resolution, and overall detector plus electronics event capacity. These properties are briefly summarized in Table 4.3 and are discussed in more detail in the following sections. Values of the quantum efficiency and background quoted here are based on in-flight and ground performance of the HRI.
|Field of View||38' (square)|
|Spatial Resolution||1.7'' (FWHM)|
|Quantum Efficiency||30 percent at 1 keV|
|Window Transmission||75 percent at 1 keV|
|(counts arcmin s )||external|
|Temporal Resolution||61 s|
|Dead Time||0.36 to 1.35 ms|
Depending upon orbital location. Depending upon viewing direction.