Astronomy and astrophysics, 575:A90. EDP Sciences Astronomy & Astrophysics, 575, March, pp. A90 Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 575, pp.A90. ⟨10.1051/0004-6361/201424504⟩ Astronomy and Astrophysics-A&A, 2015, 575, pp.A90. ⟨10.1051/0004-6361/201424504⟩ Astronomy and Astrophysics Astronomy & Astrophysics (0004-6361), 575, A90 Garsden, H, Girard, J N, Starck, J L, Corbel, S, Tasse, C, Woiselle, A, McKean, J P, van Amesfoort, A S, Anderson, J, Avruch, I M, Beck, R, Bentum, M J, Best, P, Breitling, F, Broderick, J, Brüggen, M, Butcher, H R, Ciardi, B, de Gasperin, F, de Geus, E, de Vos, M, Duscha, S, Eislöffel, J, Engels, D, Falcke, H, Fallows, R A, Fender, R, Ferrari, C, Frieswijk, W, Garrett, M, Grießmeier, J, Gunst, A W, Hassall, T E, Heald, G, Hoeft, M, Hörandel, J, van der Horst, A, Juette, E, Karastergiou, A, Kondratiev, V I, Kramer, M, Kuniyoshi, M, Kuper, G, Mann, G, Markoff, S, McFadden, R, McKay-Bukowski, D, Mulcahy, D D, Munk, H, Norden, M J, Orru, E, Paas, H, Pandey-Pommier, M, Pandey, V N, Pietka, G, Pizzo, R, Polatidis, A G, Renting, A, Röttgering, H, Rowlinson, A, Schwarz, D, Sluman, J, Smirnov, O, Stappers, B W, Steinmetz, M, Stewart, A, Swinbank, J, Tagger, M, Tang, Y, Thoudam, S, Toribio, C, Vermeulen, R, Vocks, C, van Weeren, R J, Wijnholds, S J, Wise, M W, Wucknitz, O, Yatawatta, S, Zarka, P & Zensus, A 2015, ' LOFAR sparse image reconstruction ', Astronomy and Astrophysics, vol. 575 . https://doi.org/10.1051/0004-6361/201424504 Astronomy & Astrophysics, 575, A90 Astronomy & astrophysics, 575(A90), 1-19. EDP Sciences Astronomy & Astrophysics, 575:A90. EDP Sciences Astronomy and Astrophysics-A&A, EDP Sciences, 2015, 575, A90 18 p. ⟨10.1051/0004-6361/201424504⟩