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Imaging in hard X-rays of any astrophysical source with high angularresolution is a challenging job. Shadow-casting technique is one of the mostviable options for imaging in hard X-rays. We have used two different types ofshadow-casters, namely, Coded Aperture Mask (CAM) and Fresnel Zone Plate (FZP)pair and two types of pixellated solid-state detectors, namely, CZT and CMOS inRT-2/CZT payload, the hard X-ray imaging instrument onboard the CORONAS-PHOTONsatellite. In this paper, we present the results of simulations with differentcombinations of coders (CAM & FZP) and detectors that are employed in theRT-2/CZT payload. We discuss the possibility of detecting transient Solarflares with good angular resolution for various combinations. Simulated resultsare compared with laboratory experiments to verify the consistency of thedesigned configuration.

experimental astronomy

Instruments of RT-2 Experiment onboard CORONAS-PHOTON and their test and  evaluation III: Coded Aperture Mask and Fresnel Zone Plates in RT-2/CZT  Payload