XMM-Newton observation of 4U 1820-30 - Broad band spectrum and the contribution of the cold interstellar mediumE. Costantini, C. Pinto, J. S. Kaastra, J. J. M. in’t Zand, M. J. Freyberg, L. Kuiper, M. Méndez, C. P. de Vries and L. B. F. M. WatersA&A, 539 (2012) A32DOI: https://doi.org/10.1051/0004-6361/201117818
