0520054

We propose to use INTEGRAL SPI and IBIS to measure gamma-ray lines and hard X-ray continua to help clarify the mechanisms nucleosynthesis and dynamics of sufficiently nearby supernovae of any type. These have always been major objectives of the INTEGRAL mission and gamma-ray line astronomy in general but are yet to be achieved with the notable exception of SN 1987A. The requested observations range from relatively short studies of continuum emission from supernova ejecta interactions with circumstellar matter to multiple observations of very nearby events as we hope to watch the ejecta unfold to reveal the radioactivity within. We define the Target of Opportunity trigger criteria clearly for each category of event by specifying a complete list of potential host galaxies. Although there is a low probability of any of these events in a given year there is a significant chance of one or more objects meeting our criteria in the remaining years of the INTEGRAL mission. [truncated! Please see actual data for full text]