Statistics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991itns...38..591c&link_type=abstract
(1990 Nuclear Science Symposium, Arlington, VA, Oct. 23-26, 1990, Proceedings. A91-42475 17-35) IEEE Transactions on Nuclear Sci
Statistics
3
Background Radiation, Image Processing, X Ray Imagery, X Ray Telescopes, Apertures, Compton Effect, Image Reconstruction, Photocathodes, Radiation Distribution, Scintillation Counters
Scientific paper
It is found that the subtractive flat field technique for nonuniform background illumination is generally effective at removing background systematics for stationary mask experiments such as the Energetic X-ray Imaging Experiment. The time dependence of intensity and the two-dimensional shape of the background detector image during the flight are explored. A flat field image is constructed from observations where X-ray sources were absent from the field of view. It is shown that this technique can successfully reduce rms fluctuations to within a few percent of ideal Poisson statistics. The quality of the flat field does not appear to be a strong function of radius and can be used effectively out to the edge of the detector to remove the strong background ring.
Braga Jaoa
Covault Corbin E.
Grindlay Jonathon E.
Manandhar Raj P.
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