The young pulsar PSR B0540-69.3 and its synchrotron nebula in the optical and X-raysN. I. Serafimovich, Yu. A. Shibanov, P. Lundqvist and J. SollermanA&A, 425 3 (2004) 1041-1060DOI: https://doi.org/10.1051/0004-6361:20040499