Polarimetry with FOCAS
FOCAS has two types of retarders and a Wollaston prism for
polarimetry. From S04A both linear and circular polarimetry
modes are available. Multi-object spectropolarimetry (MOS-p)
is not available because of the position-dependence of the
instrumental polarization which cannot be corrected for
in a simple way.
Note: 0.8'' center slit mask for spectropolarimetry is unavailable from S22A semester.
Generally, precise polarimetry/spectropolarimety requires an additional
knowledge of the observing techniques and data reduction. If you are
unfamiliar with polarimetric observing, you are encouraged to consult
experienced observers or the FOCAS support astronomer before submitting
your observing proposal.
|