A New Spectropolarimeter at the Dodaira Observatory

Details A New Spectropolarimeter at the Dodaira Observatory A New Spectropolarimeter at the Dodaira Observatory

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pasp..111..898k&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 111, Issue 761, pp. 898-908.

Astronomy and Astrophysics

Astronomy

22

Instrumentation: Spectrographs

Scientific paper

We report a newly developed spectropolarimeter with a low-dispersion resolution (R=40-200) and a wide coverage in wavelength (400-900 nm). It is mainly used along with the 0.91 m telescope at the Dodaira Observatory of the National Astronomical Observatory, Japan. This instrument and the related reduction software are described briefly. The present polarimetric accuracy (rms) is estimated to be [(P/50)^2+(0.05)^2]^1/2%, where P is the linear polarization degree in percent. The spectropolarimeter has the advantage of being most useful in the polarimetric studies of both the continuum and the strong emission and/or absorption lines. It is mainly used for the short- or long-term monitoring of variable circumstellar polarization and of polarization in comets, and for studies on interstellar polarization.

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