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Interferometric BIdimensional Spectrometer
The IBIS 2.0 project upgrades the Interferometric BIdimensional Spectrometer, which was operated at the Dunn Solar Telescope of the National Solar Observatory from 2003 to 2019, for installation at a new telescope at the Teide Observatory. The instrument combines two tunable Fabry-Perot interferometers, narrowband interference filters, a polarimetric unit, fast cameras, and a suitable control for the acquisition of high-resolution spectropolarimetric data of the solar atmosphere in the 580–860 nm spectral range with short exposures at high cadence under a remote control.
Figure 1. IBIS observations of a sunspot acquired on 13 May 2016 at the Dunn Solar Telescope, USA. From left to right: observations taken at the photospheric Fe I 617.3 nm and chromospheric Ca II 854.2 nm lines, in the continuum and core of both lines.
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