Analysis of broad-band Hα coronagraphic observationsD. Romeuf, N. Meunier, J.-C. Noëns, S. Koutchmy, R. Jimenez, O. Wurmser, S. Rochain and “Observateurs Associés” TeamA&A, 462 2 (2007) 731-741DOI: https://doi.org/10.1051/0004-6361:20054159