  Cadmium-Zinc-Telluride Imager (CZTI) is one of the five payloads on-board
recently launched Indian astronomy satellite AstroSat. CZTI is primarily
designed for simultaneous hard X-ray imaging and spectroscopy of celestial
X-ray sources. It employs the technique of coded mask imaging for measuring
spectra in the energy range of 20 - 150 keV. It was the first scientific
payload of AstroSat to be switched on after one week of the launch and was made
operational during the subsequent week. Here we present preliminary results
from the performance verification phase observations and discuss the in-orbit
performance of CZTI.
