At high longitudes it appears toĪbstract = "The stages before the formation of stars in molecular clouds are poorly understood. The projected magnetic field shows a large-scale ordered pattern. Our analysis resulted in reliable measurements of 641 stars with median fractional linear polarization 1.3 per cent. We present in detail optimizations in the reduction pipeline specific to wide-field observations. The data were taken in the R band and analysed with the automated reduction pipeline of the instrument. This is the first application of the wide-field imaging capabilities of RoboPol. We present the first extended, wide-field (similar to 10 deg(2)) map of the Polaris Flare cloud in dust-absorption induced optical polarization of background stars, using the Robotic Polarimeter (RoboPol) polarimeter at the Skinakas Observatory. The plane-of-the-sky orientation of the field can be traced by polarized starlight. Insights can be gained by studying the properties of quiescent clouds, such as their magnetic field structure. The stages before the formation of stars in molecular clouds are poorly understood.
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