VLT/FORS2 observations of the optical counterpart of the isolated neutron star RBS 1774 R. P. Mignani, S. Zane, R. Turolla, F. Haberl, M. Cropper, C. Motch, A. Treves and L. Zampieri A&A, 530 (2011) A39 Published online: 04 May 2011 DOI: 10.1051/0004-6361/201016362