Probing the Magnetic Fields of Nearby Spiral Galaxies at Low Frequencies   with LOFAR
  While the Low Frequency Array (LOFAR) is still in its commissioning phase, early science results are starting to emerge. Two nearby galaxies, M51 and NGC4631, have been observed as part of the Magnetism Key Science Project's (MKSP) effort to increase our understanding of the nature of weak magnetic fields in galaxies. LOFAR and the complexity of its calibration as well as the aims and goals of the MKSP are presented. 
D. D. Mulcahy, R. Drzazga, B. Adebahr, J. Anderson, R. Beck, M. R.   Bell, K. Chyzy, R. Giessuebel, G. Heald, A. Horneffer, ...
astro-ph.CO