Observations and modeling of polar faculae on the sun [Elektronische Ressource] / vorgelegt von Oleg Okunev

Observations and modeling of polarfaculae on the SunDissertationzur Erlangung des Doktorgradesder Mathematisch-Naturwissenschaftlichen Fakultaten¤der Georg-August-Universitat¤ zu Gottingen¤vorgelegt vonOleg Okunevaus Sankt Petersburg / RusslandGottingen¤ 2004D7Referent: Prof. Dr. F. KneerKorreferent: Prof. Dr. S. Dreizler¤ ¤Tag der mundlichen Prufung: 16.09.2004ContentsSummary 51 Introduction 72 Observations and Data Reduction 112.1 One-dimensional spectrograms observed with Gregory-Coude· Telescope . 132.1.1 Standard data reduction . . . . . . . . . . . . . . . . . . . . . . . 152.1.2 Noise ltering . . . . . . . . . . . . . . . . . . . . . . . . . . . 182.1.3 Reduction of Stokes V spectrograms . . . . . . . . . . . . . . . . 222.1.4 Intensity maps . . . . . . . . . . . . . . . . . . . . . . . . . . . 232.2 Two-dimensional spectra observed with Vacuum Tower Telescope . . . . 252.2.1 Fabry-Perot interferometer . . . . . . . . . . . . . . . . . . . . . 252.2.2 Structure of observations . . . . . . . . . . . . . . . . . . . . . . 272.2.3 Spectral quality of 2D spectrograms . . . . . . . . . . . . . . . . 282.2.4 Broadband speckle reconstruction . . . . . . . . . . . . . . . . . 302.2.5 Reconstruction of narrowband images . . . . . . . . . . . . . . . 322.2.6 Stokes V corrections . . . . . . . . . . . . . . . . . . . . . . . . 342.3 Signal recognition in polarimetric data . . . . . . . . . . . . . . . . . . . 372.4 Instrumental polarization . . . .