Titlebook: Cosmic Explosions; On the 10th Annivers Juan-María Marcaide,Kurt W. Weiler Conference proceedings 20051st edition Springer-Verlag Berlin He

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Optical, Ultraviolet, and Infrared Observations of SN 1993Jlentiful. Some results from theoretical modeling of the observations are also discussed. SN 1993J has provided the best observational evidence for the transformation of a SN from one spectral type to another, thereby providing a link between Type II and Type Ib supernovae (SNe). This has strengthene

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Detection of the Binary Companion to the Progenitor of SN 1993Jomponent in the spectra of SN1993J which cannot be explained by the surrounding faint blue stars. This is the first detection of the expected massive binary companion to the red supergiant progenitor and confirms that SN1993J did indeed arise in an interacting binary system.

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VLBI Observations of SN 1979C and SN 1986Jto 22 yr after the explosion, SN 1979C expands .., almost freely, with . = 0.95 ± 0.03. For a total kinetic energy of 3 × 1051 erg, the expansion result requires a mass-loss to wind-velocity ratio for the progenitor of only 1 × 10. M. yr.per 10 km s., an order of magnitude smaller than estimated fro