Status report of AO188+LGS (+future AO) Yutaka Hayano (Subaru Telescope, NAOJ) S. Oya, M. Hattori, Y. Saito, Y. Minowa, M. Ito, H. Terada, T.S. Pyo, H.

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Presentation transcript:

Status report of AO188+LGS (+future AO) Yutaka Hayano (Subaru Telescope, NAOJ) S. Oya, M. Hattori, Y. Saito, Y. Minowa, M. Ito, H. Terada, T.S. Pyo, H. Takami, M. Iye (NAOJ), S. Egner (Kayser-Threde GmbH), S Oyabu (Nagoya U.)

Topics in  Recovery of damaged deformable mirror.  LGS mode commissioning.  Risk-shared open use at S11A and S11B.

New deformable mirror (DM)  DM was damaged in Jan,  High AC current was applied to the two ground pins.  New DM has delivered in August, 2010  Implemented electrical circuit breaker.  Implemented software limit switch.  On-sky performance test in October,  Back to open use operation in November,  Web release on Dec. 27, 2010.

Performance of NGS mode.

Commissioning of LGS mode.  First closed loop on sky in December,  Strehl ratio ~ 0.1 – K-band  FWHM ~ 0.1 K-band  Performance v.s. guide star magnitude.  17.8 mag 1 kcps / APD (Low-order WFS.)  Performance v.s. separatation of TT guide star.  Anisoplanatism of TT/focus mode might be larger than 60”.

Risk shared open use  Risk in performance.  SR ~ 0.1 – 0.2, FWHM ~ 0.1” at K-band.  Guide star magnitude: brighter than 17.5 in R-band.  Separation of guide star: < 80”.  Elevation limit = 25 deg.  Other features.  ADC  Science path, high-order WFS, low-order WFS.  F-conversion optics. (12 mas mode.)

Future AO for Subaru Telescope.  3 rd generation AO for next instrument at IR.  Wider field coverage. (~ 10 arcmin.)  High throughput. (Adaptive secondary mirror.)  Active/Adaptive optics.  Multiple guide stars and multiple WFSs.  MOAO, GLAO, LTAO etc.