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AstroSat is India's first space-based astronomical observatory, launched onSeptember 28, 2015. One of the payloads aboard AstroSat is the Cadmium ZincTelluride Imager (CZTI), operating at hard X-rays. CZTI employs atwo-dimensional coded aperture mask for the purpose of imaging. In this paper,we discuss various image reconstruction algorithms adopted for the test andcalibration of the imaging capability of CZTI and present results from CZTIon-ground as well as in-orbit image calibration.

Imaging calibration of AstroSat Cadmium Zinc Telluride Imager (CZTI)