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Fig. 25.


Polarization of high polarization standard stars for the N_R filter: black symbols give efficiency or c1 corrected values while red symbols are also corrected for the telescope polarization (c2-correction). For individual targets, either plus-signs or diamonds are used in order to avoid confusion. Corresponding literature values are plotted as blue squares with error bars. Also included are the zero-polarization standard stars from the previous subsection.

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