Linear polarimetry is possible with the heterodyne instruments, and is useful for e.g. masers and polarized molecular cloud spectra (the "Golreich-Kylafis effect": ApJ 243, L75). Observations are performed similarly to those with the SCUBA Polarimeter. Half-wave plates exist for the A, B and D bands; only A and B band polarimetry has been tested.

This observing mode has produced good results (e.g. Greaves et al. 1999; ApJ 512, L139) but is still somewhat experimental and is supported on a best efforts basis. Observing and data reduction are not automated and projects will include substantial overheads (of order 100%). For more information on use, observing and data reduction see this manual.

We are currently developing a new and significantly more powerful heterodyne instrument polarimeter, Rover, that should be available collaboratively on the JCMT. The web page describes our plans (and also shows some scientific results from the existing heterodyne polarimeter).