High-Resolution Radio Imaging of Young Supernovae : SN 1979 C , SN 1986 J , and SN 2001 gd

1 IAA CSIC, Apdo. Correos 3004, 18008 Granada, Spain; torres@iaa.es 2 Departamento de Astronomi'a, Universidad de Valencia, 46100 Burjassot, Spain 3 Max-Planck-Institut fur Radioastronomie, 53121 Bonn, Germany 4 Dpto. de Fi'sica Teorica y del Cosmos, Universidad de Granada, Spain 6 Istituto di Radioastronomia/CNR, via P. Gobetti 101, 40129 Bologna, Italy 6 Naval Research Laboratory, Code 7213, Washington, DC 20375-5320, USA 7 MERLIN/VLBI National Facility, Jodrell Bank Observatory, UK 8 IPAC/Caltech, Mail Code 100-22, Pasadena, CA 91125, USA 9 Department of Astronomy, AlbaNova 106 91 Stockholm, Sweden 10 ESA/Space Telescope Science Institute, Baltimore, MD 21218, USA 11 Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA 12 National Radio Astronomy Observatory, P.O. Box 0, Socorro, NM 87801, USA