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Proceedings Paper

Multiwavelength imaging system for the Dutch Open Telescope
Author(s): Felix C.M. Bettonvil; Peter Suetterlin; Robert H. Hammerschlag; Aswin P.L. Jagers; Robert J. Rutten
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Paper Abstract

The Dutch Open Telescope (DOT) is an innovative solar telescope, completely open, on an open steel tower, without a vacuum system. The aim is long-duration high resolution imaging and in order to achieve this the DOT is equipped with a diffraction limited imaging system in combination with a data acquisition system designed for use with the speckle masking reconstruction technique for removing atmospheric aberrations. Currently the DOT is being equipped with a multi-wavelength system forming a high-resolution tomographic imager of magnetic fine structure, topology and dynamics in the photosphere and low- and high chromosphere. Finally the system will contain 6 channels: G-band (430.5 nm), Ca II H (K) (396.8 nm), H-α (656.3 nm), Ba II (455.4 nm), and two continuum channels (432 and 651 nm). Two channels are in full operation now and observations show that the DOT produces real diffraction limited movies (with 0.2" resolution) over hours in G-band (430.5 nm) and continuum (432 nm).

Paper Details

Date Published: 11 February 2003
PDF: 12 pages
Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, (11 February 2003); doi: 10.1117/12.460287
Show Author Affiliations
Felix C.M. Bettonvil, Astronomical Institute/Univ. Utrecht (Netherlands)
Netherlands Foundation For Research in Astronomy (Netherlands)
Peter Suetterlin, Astronomical Institute/Univ. Utrecht (Netherlands)
Robert H. Hammerschlag, Astronomical Institute/Univ. Utrecht (Netherlands)
Aswin P.L. Jagers, Univ. Utrecht (Netherlands)
Robert J. Rutten, Astronomical Institute/Univ. Utrecht (Netherlands)

Published in SPIE Proceedings Vol. 4853:
Innovative Telescopes and Instrumentation for Solar Astrophysics
Stephen L. Keil; Sergey V. Avakyan, Editor(s)

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