Timing calibration and spectral cleaning of LOFAR time series data A. Corstanje, S. Buitink, J. E. Enriquez, H. Falcke, J. R. Hörandel, M. Krause, A. Nelles, J. P. Rachen, P. Schellart, O. Scholten et al. (3 more) A&A, 590 (2016) A41 Published online: 04 May 2016 DOI: 10.1051/0004-6361/201527809