Synchrotron polarization at high galactic latitude

We present preliminary results from mapping the high-latitude galactic polarization with the Effelsberg Telescope at lambda21 cm. Structures on the resulting maps are mostly on the scale of several degrees. The results show detection of polarization over most of the field, at the level of tens of percent of the synchrotron emission. The evidence of more structure in Stokes Q and U rather than in rootQ(2) + U-2 suggests the existence of Faraday rotation. (C) 2003 Elsevier B.V. All rights reserved.