Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-05-28
Astronomy and Astrophysics
Astrophysics
Accepted for publication in Astronomy & Astrophysics, 12 pages, 11 figures
Scientific paper
10.1051/0004-6361:200809959
Aims: We aim to achieve high spatial resolution as well as high polarimetric sensitivity, using an earth-based 1m-class solar telescope, for the study of magnetic fine structure on the Sun. Methods: We use a setup with 3 high-speed, low-noise cameras to construct datasets with interleaved polarimetric states, particularly suitable for Multi-Object Multi-Frame Blind Deconvolution image restorations. We discuss the polarimetric calibration routine as well as various potential sources of error in the results. Results: We obtained near diffraction limited images, with a noise level of approximately 10^(-3) I(cont). We confirm that dark-cores have a weaker magnetic field and at a lower inclination angle with respect to the solar surface than the edges of the penumbral filament. We show that the magnetic field strength in faculae-striations is significantly lower than in other nearby parts of the faculae.
der Voort H. M. Rouppe van L.
van Noort M. J.
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