SWIFT HAS PROVEN ITSELF TO BE AN EXTRAORDINARY SUPERNOVA OBSERVATORY. THE CLEAREST APPLICATION OF SWIFT'S UNIQUE STRENGTHS IS OBTAINING VERY EARLY UV AND X-RAY DATA ON YOUNG SUPERNOVAE TO CONSTRAIN THEIR PROGENITOR SYSTEMS. AS PART OF THIS KEY PROJECT WE PROPOSE A TWO-YEAR FOLLOW-UP PROGRAM TO RAPIDLY OBSERVE ALL OF THE NEAREST EXTRAGALACTIC TRANSIENTS (MOSTLY SUPERNOVAE) WITHOUT WAITING FOR THEM TO BE SPECTROSCOPICALLY CLASSIFIED. THE QUICK-RESPONSE DISTANCE-LIMITED PROGRAM WE PROPOSE WILL DETECT ANY UV-BRIGHT RADIATIVE COOLING FOLLOWING THE SHOCK BREAKOUT FROM CORE-COLLAPSE SUPERNOVAE AND SHOCKED COMPANIONS FROM TYPE IA SUPERNOVAE. JUST AS IMPORTANTLY WE WILL CONSTRAIN THE FRACTION OF EVENTS FOR WHICH IT IS NOT SEEN. CONTINUING TO OBTAIN HIGH-QUALITY SUPERNOVA DATA AND SHARE IT WITH THE COMMUNITY CAPITALIZES ON SWIFT'S UNIQUE CAPABILITIES AND WILL ENHANCE THE LEGACY OF THE SWIFT DATASET. THIS WORK CONTRIBUTES TO NASA'S STRATEGIC GOAL TO "EXPAND HUMAN KNOWLEDGE" AND THE STRATEGIC OBJECTIVE OF "DISCOVERING THE SECRETS OF THE UNIVERSE."