HEAD Division Meeting 1999, April 1999
Session 26. Missions and Instruments
Poster, Wednesday, April 14, 1999, 8:30am Wed. - 2:00pm Thurs., Gold Room

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[26.13] AXAF CCD Imaging Spectrometer Calibration Accuracy

Mark Bautz (MIT Center for Space Research), ACIS Calibration Team

We discuss the quality of the ground calibration of the AXAF CCD Imaging Spectrometer, one of two focal plane instruments aboard the Chandra X-ray Observatory (formerly known as AXAF). We use uncertainties in detector model parameters derived from fits to the calibration data to derive errors in energy scale, detector resolution and detection efficiency. We compare these uncertainty estimates to those obtained from the self-consistency of the calibration measurements. We estimate the contribution of ACIS calibration errors to uncertainties in Chandra measurements of astrophysical spectral model parameters.

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