A Sensitive Tip-Tilt Wave-Front Sensor for the Multi-Conjugate Adaptive-Optics System on the Gemini South Telescope

We will construct a sensitive tip-tilt wave-front sensor for the GeMS Multi-Conjugate Adaptive-Optics system on the Gemini South telescope in Chile. GeMS is a unique and revolutionary new system that delivers nearinfrared images at similar resolution to the Hubble Space Telescope at optical wavelengths over wide fields. Improvements in technology mean that we will be able to do this on much fainter objects than is currently possible using this new wave-front sensor. This will allow GeMS to routinely study the morphologies of external galaxies at high angular resolution - greatly extending its science scope. Sharper images will also be obtained for all objects that are currently accessible, leading to higher quality science data.