GMRT observations of the Ophiuchus galaxy cluster M. Murgia, D. Eckert, F. Govoni, C. Ferrari, M. Pandey-Pommier, J. Nevalainen and S. Paltani A&A, 514 (2010) A76 Published online: 26 May 2010 DOI: 10.1051/0004-6361/201014126