A Pile-up Model For The Chandra HETGS

Details A Pile-up Model For The Chandra HETGS A Pile-up Model For The Chandra HETGS

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008head...10.0403d&link_type=abstract

American Astronomical Society, HEAD meeting #10, #4.03

Astronomy and Astrophysics

Astrophysics

Scientific paper

The observation of a bright X-ray source by the Chandra X-ray Observatory's High Energy Transmission Grating Spectrometer (HETGS) can be compromised by photon pile-up in the CCDs leading to false absorption features in the dispersed spectrum. A statistical method of handling pile-up in non-dispersive Chandra spectra has been widely available for several years. Here, a new model of photon pile-up in dispersed spectra will be presented. The effectiveness of the model will be illustrated by its application to HETGS observations of several ultraluminous X-ray sources, including Cygnus X-1, Circinus X-1, and GX 5-1.
This work is supported under contract SV3-73016 between MIT and the Smithsonian Astrophysical Observatory, which operates the Chandra X-ray Center on behalf of NASA under contract NAS8-03060.

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