Ks-band polarization map of stars in the Galactic center. Only reliably measured polarization values are shown here. Black circles/red lines and blue circles/green lines: datasets presented in Buchholz et al. (2011). Red circles and black lines: new March 2011 Ks-band data. The diameter of the circles corresponds to the brightness of the source. Thin black lines in the background denote magnetic fields determined from mid-infrared (MIR) data (Aitken et al. 1998, based on a 1.5′′ beam). The brightest sources are also indicated.