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The spectropolarimetric mode IS NOT OFFERED with GRACES. 


ESPaDOnS' polarimetric device is at the Cassegrain focus of the CFHT telescope. Therefore, the polarization of the beam is analyzed before it enters ESPaDOnS' spectrograph. To do the same with GRACES, the light would have to be analyzed with a polarimetric device in the Gemini telescope instrument support before it is sent into the long 270m fibers.


Gemini-North telescope does have a polarimeter device called GPOL for analyzing the Stokes U and Q parameters. However, it is not yet commissioned and none of the Gemini instruments is currently equipped with a Wollaston prism.

Gemini Observatory Participants