Method for improving line flux and redshift measurements with narrowband filters J. Zabl, W. Freudling, P. Møller, B. Milvang-Jensen, K. K. Nilsson, J. P. U. Fynbo, O. Le Fèvre and L. A. M. Tasca A&A, 590 (2016) A66 Published online: 12 May 2016 DOI: 10.1051/0004-6361/201526378