1. 1 Keck NGAO Project Replan: Science Cases and Requirements Claire Max NGAO Team Meeting 6 April 25, 2007

2. 2

3. 3 Not on this list Orion Initial Mass Function Orion Initial Mass Function Mira Variables Mira Variables T Tauri T Tauri

4. 4 AO Roll-Up to date

5. 5 Summary of rolled-up requirements Wavelength range 0.7 - 2.4  m Wavelength range 0.7 - 2.4  m Wavefront error: 140 nm Wavefront error: 140 nm – Tip-tilt blurring has not been thoroughly explored yet – 170 nm acceptable for some science cases Enclosed energy (high-z galaxies): 50% within 0.07 arc sec over >30% of sky Enclosed energy (high-z galaxies): 50% within 0.07 arc sec over >30% of sky Contrast: Contrast: –  I=5.5 at 0.5 arc sec sep'n –  H=53 at 1 arc sec sep'n

6. 6 Rolled-up requirements, contd Photmetric accuracy: 5% Photmetric accuracy: 5% Astrometric accuracy: Astrometric accuracy: – Galactic Center 0.1 mas – Other science cases 1.5 - 2 mas Added background due to AO system: Added background due to AO system: – Less than 30% above (sky + telescope) Radial velocity accuracy <10 km/s Galactic Ctr Radial velocity accuracy <10 km/s Galactic Ctr Time to switch between LGS targets < 10 min Time to switch between LGS targets < 10 min