Hamamatsu Ccd Upgrade For The Gemini Multi-Object Spectrographs Gmos-S And Gmos-N: Results From The 2017 Gmos-N Upgrade And Project Completion Summary

The installation of fully-depleted Hamamatsu CCDs in GMOS-N in February/March 2017 marked the conclusion of the CCD upgrade project for the two Gemini Multi-Object Spectrographs. The corresponding upgrade for GMOS-S was completed in June/July 2014, so that both GMOS instruments are now operated with a detector array of three fully-depleted Hamamatsu CCDs. We present results from the commissioning of the GMOS-N Hamamatsu CCDs and discuss their on-sky performance. We provide a comparison of the GMOS-N and GMOS-S detector parameters and summarize the main observing and data reduction strategies that apply to both detector arrays.