We present the current status of soft X-ray calibration of X-ray CCD cameras, X-ray Imaging Spectrometer (XIS), onboard Astro-E2. We perform soft X-ray calibration of four front illuminated (FI) CCD cameras and two back illuminated (BI) CCD cameras, among which four cameras will be selected to be installed on the satellite. The calibration aims to measure the quantum efficiency and re-distribution function of the CCDs as a function of incident X-ray energy. A soft X-ray spectrometer is used to measure these items. In addition, we employ a gas proportional counter and an XIS engineering unit as reference detectors for the quantum efficiency measurement. We describe how we calibrate the absolute quantum efficiency of the XIS using these instruments. We show some of the preliminary results of the calibration including quick look results of BI CCD cameras.

/pdf/soft-x-ray-response-of-x-ray-ccd-camera-xis-onboard-astro-e2-wdscovuif2.pdf

Soft x-ray response of x-ray CCD camera XIS onboard Astro-E2

The Astro-E mission

X-ray imaging spectrometers for Astro-E: Ground calibration in soft X-ray range

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X-ray imaging spectrometers for Astro-E: Ground calibration in soft X-ray range