A millimeter polarimeter for the 45m telescope at Nobeyama

Physics

Scientific paper

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Radiation Mechanisms, Polarization, Photometric, Polarimetric, And Spectroscopic Instrumentation, Radio Telescopes And Instrumentation, Heterodyne Receivers, Radio, Microwave

Scientific paper

We have designed and constructed a tunable polarimeter system to cover frequencies from 35 GHz to 250 GHz (8.6 mm and 1.2 mm in wavelength) for the 45m telescope at Nobeyama Radio Observatory (NRO). Both circular and linear polarizations can be measured by the polarimeter. The performance of the polarimeter in astronomical observations was tested by simultaneously measuring the linear polarization of the J=2-1 transition of SiO in the v=0 and 1 states at 86 GHz toward VY CMa. The design, construction, and tests are presented briefly. .

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