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The Astrophysical Journal Volume 610 Number 2 Create an alert RSS this journal

Jingqiang Li et al. 2004 ApJ 610 1204 doi:10.1086/421866

Chandra ACIS Subpixel Event Repositioning: Further Refinements and Comparison between Backside- and Frontside-illuminated X-Ray CCDs

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Jingqiang Li1, Joel H. Kastner1, Gregory Y. Prigozhin2, Norbert S. Schulz2, Eric D. Feigelson3 and Konstantin V. Getman3

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Abstract References Cited By

We further investigate subpixel event repositioning (SER) algorithms in application to Chandra X-Ray Observatory (Chandra) 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 frontside-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.


Subject headings

instrumentation: detectors; methods: data analysis; techniques: image processing; X-rays: general


Dates

Issue 2 (2004 August 1)

Received 2003 December 19, accepted for publication 2004 April 13



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