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Proceedings Paper

Discarding piled-up events in ACIS
Author(s): Patrick Sean Broos; Leisa K. Townsley; John A. Nousek
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Paper Abstract

The coincidence of multiple x-rays in a detection cell within one CCD frame - an effect known as pile-up - is a significant source of spectral contamination for bright sources observed with the AXAF CCD Imaging Spectrometer (ACIS). Investigation of algorithms for correcting contaminated spectra is underway. In case where such algorithms fail, the observer may wish to discard events for the core of the AXAF point spread function (PSF), computing spectra using only events from the PSF wings, where pile-up effects are reduced. This work investigates the effectiveness of this technique for an isolated on-axis point source, using event lists produced by a Monte Carlo simulation of the ACIS instrument.

Paper Details

Date Published: 19 November 1998
PDF: 6 pages
Proc. SPIE 3444, X-Ray Optics, Instruments, and Missions, (19 November 1998); doi: 10.1117/12.331251
Show Author Affiliations
Patrick Sean Broos, The Pennsylvania State Univ. (United States)
Leisa K. Townsley, The Pennsylvania State Univ. (United States)
John A. Nousek, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 3444:
X-Ray Optics, Instruments, and Missions
Richard B. Hoover; Arthur B. C. Walker, Editor(s)

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