Multiband optical observations of the old PSR B0950+08 S. V. Zharikov, Yu. A. Shibanov, R. E. Mennickent, V. N. Komarova, A. B. Koptsevich and G. H. Tovmassian A&A, 417 3 (2004) 1017-1030 Published online: 26 March 2004 DOI: 10.1051/0004-6361:20034230