Orbital phase-resolved spectroscopy of 4U 1538−52 with MAXI J. J. Rodes-Roca, T. Mihara, S. Nakahira, J. M. Torrejón, Á. Giménez-García and G. Bernabéu A&A, 580 (2015) A140 Published online: 21 August 2015 DOI: 10.1051/0004-6361/201425323