Optical CCD photometry of the microquasar LS 5039 J. Martí, P. Luque-Escamilla, J. L. Garrido, J. M. Paredes and R. Zamanov A&A, 418 1 (2004) 271-274 Published online: 02 April 2004 DOI: 10.1051/0004-6361:20035886