The Cadmium Zinc Telluride Imager on AstroSat
V. Bhalerao (1), D. Bhattacharya (1), A. Vibhute (1), P. Pawar (1,2),, A. R. Rao (3), M. K. Hingar (3), Rakesh Khanna (3), A. P. K. Kutty (3), J. P., Malkar (3), M. H. Patil (3), Y. K. Arora (3), S. Sinha (3), P. Priya (4),, Essy Samuel (4), S. Sreekumar (4), P. Vinod (4)
TL;DR
The paper describes the design, capabilities, and components of the CZTI instrument on AstroSat, highlighting its energy range, imaging resolution, and potential for polarisation studies of high-energy astrophysical sources.
Contribution
It provides a comprehensive overview of the CZTI instrument, including its detectors, mask, and electronic configuration, enabling future high-energy astrophysics research.
Findings
CZT detectors cover 20 keV to >200 keV energy range.
Angular resolution of 17 arcminutes over a 4.6° field of view.
Sensitive to gamma-ray bursts and transients in about 30% of the sky.
Abstract
The Cadmium Zinc Telluride Imager (CZTI) is a high energy, wide-field imaging instrument on AstroSat. CZT's namesake Cadmium Zinc Telluride detectors cover an energy range from 20 keV to > 200 keV, with 11% energy resolution at 60 keV. The coded aperture mask attains an angular resolution of 17' over a 4.6 deg x 4.6 deg (FWHM) field of view. CZTI functions as an open detector above 100 keV, continuously sensitive to GRBs and other transients in about 30% of the sky. The pixellated detectors are sensitive to polarisation above ~100 keV, with exciting possibilities for polarisation studies of transients and bright persistent sources. In this paper, we provide details of the complete CZTI instrument, detectors, coded aperture mask, mechanical and electronic configuration, as well as data and products.
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