Free Access
Issue
Astron. Astrophys. Suppl. Ser.
Volume 128, Number 3, March II 1998
Page(s) 589 - 598
DOI https://doi.org/10.1051/aas:1998166
Published online 15 March 1998
DOI: 10.1051/aas:1998166

A&A Supplement series, Vol. 128, March II 1998, 589-598

Received June 17; accepted July 29, 1997

The Italian Panoramic Monochromator

F. Cavallini

Send offprint request: F. Cavallini e-mail: fabio@utorre.arcetri.astro.it
Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy

Abstract:

A new instrument for solar bidimensional spectroscopy, the Italian Panoramic Monochromator (IPM), has been recently installed on the Télescope Heliographique pour l'Étude du Magnétisme et des Instabilités de l'atmosphère Solaire (THEMIS), the French-Italian solar telescope built in Tenerife (Canary Islands). On a square field tex2html_wrap_inline474, this instrument allows one to obtain monochromatic images of the solar surface with high spectral resolution (tex2html_wrap_inline476 256000 at 5500 Å), preserving all the spatial resolution delivered by the telescope (tex2html_wrap_inline478). The wavelength stability of the instrumental profile is very high, the maximum drift in 10 hours amounting to about 10 ms-1.

keywords: instrumentation: interferometers -- instrumentation: spectrographs -- Sun: photosphere -- Sun: chromosphere

Copyright by the European Southern Observatory (ESO)

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