Properties: First Light: April 2006 Best Closed-Loop Strehl (K): 63% Faintest Guide Star mJ=8.7 Detector RON: 15 e- Highest loop speed: 300 Hz Pyramid Prism Tip Size: <20µm (<1/10 λ/D) Overall Quantum Efficiency: ~15% Publications: PYRAMIR: construction and implementation of the world's first infrared pyramid sensor 2006, SPIE 6272, Peter et al. PYRAMIR: first on-sky results from an infrared pyramid wavefront sensor 2006, SPIE 6272, Feldt et al. Optical design and cryogenic mounting of the optics for a pyramid waterfront sensor working in the near infrared wavelength range 2005, SPIE 5962, 674 Bizenberger, Baumeister, Büchler Costa, and Peter Development of a new infrared pyramid wavefront sensor 2005, PhDT Büchler de Matos Costa Paccetti Correia Next-generation deformable mirror electronics 2004, SPIE 5490, 1579 Barberio and Wagner Performance of PYRAMIR detector system 2004, SPIE 5490, 1278 Ligori, Grimm, and Hippler Status report of PYRAMIR: a near-infrared pyramid wavefront sensor for ALFA 2004, SPIE 5490, 1189 Costa et al. PYRAMIR: a near-infrared pyramid wavefront sensor for the Calar Alto adaptive optics system 2003, SPIE 4839, 280 Costa et al.

M. Feldt, May 2007