INTEGRAL/SPI spectral deconvolution

Shrader, C. R.; Sturner, S. J.; Teegarden, B. J.
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p717
Academic Journal
The INTEGRAL Spectrometer or “SPI,” is a cooled-germanium instrument covering the 20 keV to ∼10 MeV energy range with a resolution of about 500. The unique nature of the instrument. 19 separate detector elements viewing the sky through a coded mask aperture, poses a number of difficulties in analyzing the data. For example, a typical observation consists of multiple pointing directions (dithering) with an instrument response that is highly directional. Multiple sources within the nominal 16 °FoV are likely to be common, and most high-energy point sources are variable over observable time scales. Thus a typical deconvolution of the detector count-rate data involves a complex global minimization problem over large data and parameter spaces. Strategies for dealing with these difficulties, are discussed and some preliminary results based on simulated data are presented. © 2000 American Institute of Physics.


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