Updated phase coherent timing solution of the isolated neutron star RX J0720.4–3125 using recent XMM-Newton and Chandra observationsM. M. Hohle, F. Haberl, J. Vink, R. Turolla, S. Zane, C. P. de Vries and M. MéndezA&A, 521 (2010) A11DOI: https://doi.org/10.1051/0004-6361/200913661
