PHYSICAL IMPLEMENTATION OF AN ANTIMASK IN URA BASED CODED MASK SYSTEMS

被引：19

作者：

JAYANTHI, UB

BRAGA, J

机构：

[1] Instituto Nacional de Pesquisas Espaciais (INPE-SCT), São José dos Campos, SP

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1991年 / 310卷 / 03期

关键词：

D O I：

10.1016/0168-9002(91)91118-F

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

X- and gamma-ray astronomy experiments which employ rectangular URA coded masks alone show artifacts in the images reconstructed due to nonuniform background levels in the detector plane. The employment of a separate antimask in addition to the mask in observations is useful to eliminate this problem. We propose here a method to implement the antimask with the same mask, utilizing the antisymmetric properties in the mask pattern, thereby avoiding the need for a separate antimask in an experiment. Simulations performed with this mask-antimask system are presented to show its advantages.

引用

页码：685 / 689

页数：5

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