Characterizing the Energy Scale of the XRS on Astro-E2

Details Characterizing the Energy Scale of the XRS on Astro-E2 Characterizing the Energy Scale of the XRS on Astro-E2

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.1616c&link_type=abstract

American Astronomical Society, HEAD meeting #8, #16.16; Bulletin of the American Astronomical Society, Vol. 36, p.931

Astronomy and Astrophysics

Astronomy

Scientific paper

The XRS on Astro-E2 consists of a microcalorimeter array with 30 active pixels. The XRS energy scale, which converts the measured pulse heights to the energies of the photons incident on the array, is a non-linear function of the thermal properties of the pixels and the power and noise conditions on the array. Each of the pixels operates independently and requires an individual energy scale. Analytic models of the XRS pulses are currently being developed that will be used to model the energy scale. However, because of the inherent complexity, a full empirical calibration of the energy scale is being conducted. The XRS energy scale has been calibrated for a range of operating conditions including variations in detector temperature, bath temperatures, and photon flux. This allows us to characterize the functional dependance of the energy scale on these variables and to then generate a semi-empirical model that can be used to account for variations in operating conditions in space. We will present the results of the empirical characterization and comparisons to the analytic models.

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