The thermal radiation of the isolated neutron star RX J1856.5–3754 observed with Chandra and XMM-NewtonV. Burwitz, F. Haberl, R. Neuhäuser, P. Predehl, J. Trümper and V. E. ZavlinA&A, 399 3 (2003) 1109-1114DOI: https://doi.org/10.1051/0004-6361:20021747
