Analysis of data from coded-mask telescopes by maximum likelihood

Details Analysis of data from coded-mask telescopes by maximum likelihood Analysis of data from coded-mask telescopes by maximum likelihood

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993nimpa.333..540s&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 333, Issue 2-3, p. 540-547.

Physics

6

Scientific paper

Coded mask telescopes have proved of great utility in X- and γ-ray astronomy. A coded mask telescope of a non-cyclic ``box-camera'' design can in some circumstances have a sensitivity advantage over an optimally coded cyclic configuration, but images reconstructed by a simple correlation technique are subject to various imperfections. A new method, maximum likelihood fitting (MALF), for the analysis of data from non-cyclic coded mask telescopes is presented. MALF avoids artifacts due to strong sources and handles in an optimum way data affected by small-number statistics, by partial coding and by aspects of real systems such as finite detector depth and obscurations of parts of the detector.

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