Abstract
A near-infrared photometer based on an InGaAs PIN photodiode and the filter set recommended by Infrared Working Group (IRWG) have been designed and built. It is mounted on the 1-m Carl–Zeiss telescope at the Vainu Bappu Observatory (VBO) in Kavalur, India. The main science goal is to observe bright sources (< 5 magnitude) in the iZ, iJ and iH photometric bands. A discussion of the instrument and on-telescope performance during first-light tests are presented in this paper.
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