Stokes imaging polarimetry using image restoration at the Swedish 1-m Solar Telescope
Abstract
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.
Keywords
Cite
@article{arxiv.0805.4296,
title = {Stokes imaging polarimetry using image restoration at the Swedish 1-m Solar Telescope},
author = {M. J. van Noort and L. H. M. Rouppe van der Voort},
journal= {arXiv preprint arXiv:0805.4296},
year = {2009}
}
Comments
Accepted for publication in Astronomy & Astrophysics, 12 pages, 11 figures