Unveiling the X-ray point source population of the Young Massive Cluster Westerlund 1J. S. Clark, M. P. Muno, I. Negueruela, S. M. Dougherty, P. A. Crowther, S. P. Goodwin and R. de GrijsA&A, 477 1 (2008) 147-163DOI: https://doi.org/10.1051/0004-6361:20077186