• Frame Type SCIENCE_SAMPOL
• DPR.TYPE OBJECT; SKY
• DPR.TECH IMAGE,JITTER,SAMPOL; IMAGE,JITTER,SAMPOL,PT; IMAGE,JITTER,SAMPOL,CUBE,PT
• INS.OPTI3.NAME 18Holes; 7Holes; 9Holes; BB_9holes

description: The simultaneous use of the Wollaston together with the SAM masks (see sparse aperture interferometric masks section) presents a unique opportunity with CONICA to examine systems where there may be polarization signals at very high spatial resolutions. The SAMPol, new observing mode of NACO was offered in P86.

It is similar to SAM and uses pupil tracking and cube modes (cube mode section).

SAMPol is offered with all filters except J and Mprime.

Note that SAMPol does not use the Polarimetry Mask, usually needed in classic polarimetry (see polarimetry) to cover the overlapping parts of the beams, because SAM/SAMPol are only used for single-object targets and there should never be the possibility for confusion between overlapping fields that the mask is intended to avoid.

For more information consult the NACO User Manual and the instrument web pages.

An example of the SAMPol observations with filter NB_1.64, 9Holes mask. The data were taken in the pupil tracking, cube mode.

SAMPol is offered only in the visitor mode. It is not supported by the pipeline.

calibrations:The calibration plan includes

• standard detector darks with readout mode and DIT matching the one used for science;
• standard sky (twilight) and/or internal flat fields without the mask;