Gemini Remote Access to CFHT ESPaDOnS Spectrograph
Gemini Remote Access to CFHT ESPaDOnS Spectrograph
Gemini Remote Access to CFHT ESPaDOnS Spectrograph
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fold<br />
mirror<br />
GRACES<br />
Injection<br />
Slicer<br />
<strong>ESPaDOnS</strong><br />
Design Overview<br />
270 m fiber ∅165 μm<br />
<strong>CFHT</strong><br />
Injection<br />
Slicer<br />
Injection<br />
Calibration<br />
Guiding<br />
GMOS/bHROS<br />
Calibration<br />
module<br />
<strong>Gemini</strong> Telescope<br />
The injec<strong>to</strong>r – the <strong>CFHT</strong>/<strong>ESPaDOnS</strong> end<br />
✓ Focal enlarging optics <strong>to</strong> image the fiber<br />
on<strong>to</strong> a Bowen Walraven image slicer at f/23<br />
and then re-image the sliced image at f/8 on<br />
the decker.<br />
<strong>CFHT</strong> Telescope<br />
✓Rotation of the Fiber GRACES slicer can produce<br />
2, 3, or 4 slices.<br />
Cassegrain Module<br />
(polarimetry)<br />
✓The 2 slice position will Guider provide R~33,000.<br />
Raw Images<br />
Ancillary data<br />
<strong>CFHT</strong> server<br />
IF <strong>Gemini</strong><br />
✓The 4 slice position will provide R~55,000.<br />
IF <strong>CFHT</strong><br />
Data Reduction<br />
LE/Opera
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