S-band Polarization All-Sky Survey (S-PASS): Survey description and maps

Abstract

We present the S-Band Polarization All Sky Survey (S-PASS), a survey of polarized radio emission over the southern sky at Dec. 3). The largest depolarization areas are in the inner Galaxy, associated with the Sagittarius Arm.We have also computed a rotation measure map combining S-PASS with archival data from theWilkinsonMicrowave Anisotropy Probe (WMAP) and Planck experiments. A Stokes I map has been generated, with sensitivity limited to the confusion level of 9 mK.