Abstract
A new instrument for multi–dimensional spectroscopy at the Gre go ry Coudé Telescope (GCT) at the Observatorio del Teide/Tenerife is presented. The system, consisting of a scanning device, a Stokes–V polarimeter and a suitable CCD system, performs fast spatial scanning. It preserves the good polarization properties of the telescope by using a Bowen compensator. We describe the instrument, the different modes of operation, and how it is controlled and give some performance data.
Highlights
Many investigations of solar structures require multi–dimensional spectroscopy, so it is a subject of intense instrumental developments
Multi–dimensionality implies the spectroscopy in two spatial coordinates
A Stokes–V polarimeter for example splits the original cube into two sub-cubes
Summary
Many investigations of solar structures require multi–dimensional spectroscopy, so it is a subject of intense instrumental developments. Multi–dimensionality implies the spectroscopy in two spatial coordinates Additional information such as the state of polarization and the temporal evolution are often measured too. Data obtained by such an instrument can be described as a cube with two spatial dimensions and one dimension of wavelength (Fig. 1). Scanning in one spatial direction and obtaining slit spectra, with the slit perpendicular to the scanning direction, is another method (e.g. Johannesson et al 1987; Ballesteros et al 1996). All these methods have advantages and disadvantages. In this paper we present such a device: the Micro–Image–Scanner (MISC)
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