The clumpy absorber in the high-mass X-ray binary Vela X-1 V. Grinberg, N. Hell, I. El Mellah, J. Neilsen, A. A. C. Sander, M. Leutenegger, F. Fürst, D. P. Huenemoerder, P. Kretschmar, M. Kühnel et al. (6 more) A&A, 608 (2017) A143 Published online: 15 December 2017 DOI: 10.1051/0004-6361/201731843