Stokes imaging polarimetry using image restoration at the Swedish 1-m Solar Telescope

摘要

Aims: We aim to achieve high spatial resolution as well as high polarimetricsensitivity, using an earth-based 1m-class solar telescope, for the study ofmagnetic 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 imagerestorations. We discuss the polarimetric calibration routine as well asvarious potential sources of error in the results. Results: We obtained neardiffraction 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 lowerinclination angle with respect to the solar surface than the edges of thepenumbral filament. We show that the magnetic field strength infaculae-striations is significantly lower than in other nearby parts of thefaculae.