Absolute calibration of ACIS x-ray CCDs using calculable undispersed synchrotron radiation

Details Absolute calibration of ACIS x-ray CCDs using calculable undispersed synchrotron radiation Absolute calibration of ACIS x-ray CCDs using calculable undispersed synchrotron radiation

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4012...53b&link_type=abstract

Proc. SPIE Vol. 4012, p. 53-67, X-Ray Optics, Instruments, and Missions III, Joachim E. Truemper; Bernd Aschenbach; Eds.

Physics

Optics

6

Scientific paper

We have performed a series of measurements with the Physikalisch-Technische Bundesanstalt beamline of the electron storage ring BESSY 1 which provide the basis for the absolute calibration of the Advanced CCD Imaging Spectrometer (ACIS). ACIS is a prime focal plane instrument aboard the recently-launched Chandra X-ray Observatory. We have achieved an absolute detection efficiency knowledge accurate to better than 5% over the 0.3 - 4 keV band. We describe our measurement and analysis techniques, including our detector response modeling and pileup corrections. We summarize a variety of external and internal consistency checks which provide the basis for our error estimates. We discuss the factors limiting the accuracy of our measurements.

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