SPI-specific analysis method and software overview

Details SPI-specific analysis method and software overview SPI-specific analysis method and software overview

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...411l.117d&link_type=abstract

Astronomy and Astrophysics, v.411, p.L117-L121 (2003)

Astronomy and Astrophysics

Astrophysics

24

Gamma-Rays: Observations, Methods: Data Analysis

Scientific paper

The SPI spectrometer on INTEGRAL features a camera system with 19 Ge detector modules, imaging photons through a tungsten coded mask. Background is reduced by an anticoincidence detector system surrounding these. The specifics of this instrument lead to data correction and analysis methods which are described here. Raw data for science analysis are detector event messages and spectra for different categories of detector hits and pulse shapes. Preprocessing combines calibrated spectra from these, which are then interpreted using the imaging and spectral response function for measured spectra where parts of the detector plane are occulted by the mask. Background dominates the overall signal, tailored background estimates and models are based on instrument-specific signatures, their correlations, and trends.

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