Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227..634b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 2, Jan. 1990, p. 634-639.
Astronomy and Astrophysics
Astronomy
2
Gamma Ray Astronomy, Image Processing, Synthetic Arrays, Apertures, Computerized Simulation, Imaging Techniques, Monte Carlo Method, Pixels, Signal Detectors
Scientific paper
The results are presented of computer simulations designed to evaluate the basic performance of a system employing a rotating hexagonal uniformly redundant array (HURA) mask and two discrete pixel detector geometries for gamma-ray imaging: a square pixel detector and a hexagonal pixel detector (HPD). Intrinsic systematic noise is found to affect the quality of the system point spread function for both detector geometries. The noise varies with the mask orientation, the detector resolution and the source position, and is highly magnified by the background level. Special configurations for the HPD geometry are identified for which a nearly perfect overlap of mask elements with detector pixels occurs at two mask orientations. Under these conditions the systematic noise is completely absent.
Byard Kevin
Dean Anthony J.
Goldwurm Andréa
Hall Jeffrey Clifton
Harding S. J. J.
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