The Italian Panoramic Monochromator

Astronomy and Astrophysics – Astrophysics

Scientific paper

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39

Instrumentation: Interferometers, Instrumentation: Spectrographs, Sun: Photosphere, Sun: Chromosphere

Scientific paper

A new instrument for solar bidimensional spectroscopy, the Italian Panoramic Monochromator (IPM), has been recently installed on the Telescope Heliographique pour l'Etude du Magnetisme et des Instabilites de l'atmosphere Solaire (THEMIS), the French-Italian solar telescope built in Tenerife (Canary Islands). On a square field 33''x 33'', this instrument allows one to obtain monochromatic images of the solar surface with high spectral resolution ({cal R} >= 256000 at 5500 Angstroms), preserving all the spatial resolution delivered by the telescope ( =~ 0.2''). The wavelength stability of the instrumental profile is very high, the maximum drift in 10 hours amounting to about 10 ms(-1) .

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