gemini south adaptive optics imager peter mcgregor research school of astronomy & astrophysics...
TRANSCRIPT
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Gemini South Adaptive Optics Imager
Peter McGregor
Research School of Astronomy & Astrophysics
The Australian National University
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GSAOI for Gemini South
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GSAOI Status
Under construction at Mt. Stromlo Obs., ANU Completed “zeroeth” cool down for thermal tests First cool down with mechanisms in July 2004 One science detector and two eng. detectors Shipment scheduled for October 2005 Commissioning January 2006 (after MCAO-1)
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Adaptive Optics
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Natural Seeing
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Classical Adaptive Optics
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Multi-Conjugate Adaptive Optics
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NGS WFS PathScience Path LGS WFS Path
Multi-Conjugate Adaptive Optics
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GSAOI Specifications
Used with MCAO system Field-of-view: 8585 Spatial pixel size: 0.020.02 Broad band filters: Z, J, H, Ks, K', K Narrow band filters: 1.5% wide zero-
redshift emission-line filters Narrow band Lyα filters at J? Four HAWAII-2RG detectors
• 4080×4080 pixels
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On-Detector Guide Windows
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GSAOI Guide Star Geometry
5 LGS 1-3 Opt. NGS 1-4 NIR NGS
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GSAOI Guide Star Geometry
5 LGS 1-3 Opt. NGS 1-4 NIR NGS
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GSAOI Performance
Z J H K
Time (s) 3600 3600 3600 3600SNR 10 10 10 10Aperture (") 0.08 0.08 0.08 0.08Seeing (") 0.4 0.4 0.4 0.4Strehl 0.2 0.2 0.4 0.6Magnitude (star) 25.6 24.1 24.1 23.7ODGW (10 ms) 15.1 14.2 14.5 13.5ODGW (30 s) 22.7 21.2 21.0 20.2
http://www
.mso.anu.e
du.au/gsao
i
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Bulk Motions from SBF
Local Group
Virgo
Great Attractor
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Star Formation Histories
And V - GMOS