1. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) The LBT AO System and LUCIFER 1.Requirements for the commissioning of LUCIFER: performance of the AO system? 2.Open Item: NIR TT or only ‚slow‘ flexure sensor, which detector? 3.Open Item: Dichroic entrance window, which cut-off/-on wavelength?

2. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Commissioning of LUCIFER 1.Commissioning of LUCIFER seeing-limited modes: we need a stable configuration (over about 15-30min) of the secondary mirror, with image quality better than seeing +20%. Maybe fast field- stabilization, AGW more or less fully operational. 2.Commissioning of LUCIFER diffraction-limited modes: the AO system has to be basically operational and should deliver (high) constant Strehl over about 5-15min at least.

3. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) LUCIFER Performance J Band Isoplanatic Field

4. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) NIR TT, the original idea

5. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Requirements for the NIR TT Unit Wavelength Range: J H K Pixelscale: 0.04arcsec/pixel (2 pixel for J) FOV: 10x10arcsec, total FOV: 1arcmin radius Leave ‚science‘ field unvignetted Has to be implemented into the instrument itself To be used with the LGS

6. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Sensitivity Requirement

7. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Simulation Results, PICNIC Seeing [arcsec] 100 Hz 20Hz 5 Hz 1.0 0.8 0.5 0.3 0.1 12.0 J-mag 12.5 13.5 14.5 16.1 13.7 J-mag 14.2 15.2 16.2 17.8 15.2 J-mag 15.7 16.7 17.7 19.3 Standard deviation of the centroiding better than 0.5 pixels, i.e. 0.02 arcsec Detector with 20 electrons RON (i.e. PICNIC) Sky background 3.6*10^5 e/s/arcsec^2 (combined JHKs) Av 3mag

8. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Simulation Results, HAWAII I Seeing [arcsec] 100 Hz 20Hz 5 Hz 1.0 0.8 0.5 0.3 0.1 13.5 J-mag 14.0 15.0 16.0 17.6 14.8 J-mag 15.3 16.1 17.3 18.9 15.9 J-mag 16.5 17.5 18.5 20.1 Standard deviation of the centroiding better than 0.5 pixels, i.e. 0.02 arcsec Detector with 5 electrons RON (i.e. HAWAII I) Sky background 3.6*10^5 e/s/arcsec^2 (combined JHKs) Av 3mag

9. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Slow Differential Flexure Sensor Wavelength Range: ‚z‘, preferably also J H K Pixelscale: 0.04arcsec/pixel (2 pixel for J) FOV: 10x10arcsec, total FOV: 1arcmin radius Leave ‚science‘ field unvignetted Has to be implemented into the instrument itself Long integration times! -> red sensitive CCD or PICNIC

10. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Layout and Implementation ADC SlitViewer Entrance Window NIR TT Telescope

11. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Detector Output to AO SW Module NIR TT or slow flexure sensor: LUCIFER provides mechanics and optics Detector control and read-out from AO SW Who selects the AO guide star? Observer......

12. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Dichroic Entrance Window 870nm2500nm LUCIFER zJHK WFS

13. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) Optimum Cut-On/Off Wavelength? 870nm 970nm

14. 21-24.02.2005LBT AO Progress Meeting, Arcetri Walter Seifert (ZAH, LSW) FOV of the TT Unit Entrance Window Science Field NIR TT Field