Chandra/ACIS Subpixel Event Repositioning. II. Further Refinements and Comparison between Backside and Front-side Illuminated X-ray CCDs

Jingqiang Li, Rochester Institute of Technology
Joel H. Kastner, Rochester Institute of Technology
Gregory Y. Prigozhin, Massachusetts Institute of Technology
Norbert S. Schulz, Massachusetts Institute of Technology
Eric D. Feigelson, The Pennsylvania State University
Konstantin V. Getman, The Pennsylvania State University

This is the pre-print of a paper published by the American Astronomical Society. The final, published version is located here:

© 2004 he American Astronomical Society.

Also archived in: arXiv:astro-ph/0401592v1

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We further investigate subpixel event repositioning (SER) algorithms in application to Chandra X-ray Observatory (CXO) CCD imaging. SER algorithms have been applied to backside illuminated (BI) Advanced CCD Imaging Spectrometer (ACIS) devices, and demonstrate spatial resolution improvements in Chandra/ACIS observations. Here a new SER algorithm that is charge split dependent is added to the SER family. We describe the application of SER algorithms to front side illuminated (FI) ACIS devices. The results of SER for FI CCDs are compared with those obtained from SER techniques applied to BI CCD event data. Both simulated data and Chandra/ACIS observations of the Orion Nebular Cluster were used to test and evaluate the achievement of the various SER techniques.