IQUEYE Sees First Light at Gemini South Telescope

This paper describes the installation and initial results of the Italian Quantum Eye (IQUEYE) at the Gemini South telescope. IQUEYE is a fast photon counter based on single photon avalanche diode detectors, capable of preserving a high level of timing accuracy. Originally designed for intensity interferometry, its scientific scope has expanded to include ultra-fast astronomy. The limiting factor for IQUEYE's capabilities is the number of detected photons, which is directly related to the size of the telescope. By installing IQUEYE at the 8.1-m Gemini South telescope, the instrument achieved an order of magnitude increase in sensitivity compared to previous operations. The initial observations at Gemini South focused on giant pulse emitters, millisecond pulsars, and transitional millisecond pulsars, totaling over 40 hours of observation time. This deployment demonstrates the potential of IQUEYE for advancing our understanding of these enigmatic objects.

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