----- Attempting Submission 1 (Tue May 01 18:21:49 GMT 2007) ----- This is the re-submission of proposal 150 Assigned ID: 1081 ----- Attempting Submission 1 (Tue Feb 06 20:54:52 GMT 2007) ----- Phase I Proposal 1081 (saints) successfully submitted. SAINTS - Supernova 1987A INTensive Survey SAINTS is a program to observe SN 1987A, the brightest supernova in 383 years, as it matures into the youngest supernova remnant at age 20. HST is the essential tool for spatially-resolved observations of SN1987A's many components. A violent encounter is now underway between the fastest-moving debris and the circumstellar ring: the shock excites "hotspots." The optical, infrared and X-ray fluxes are rising rapidly on 6-month time scales: we have organized HST, SPITZER, and CHANDRA observations to understand these regions. In Cycle 16, the separate hotspots may begin to fuse as the shock fully enters the circumstellar ring. Photons from these shocks will excite previously invisible gas outside the ring, revealing the true extent of the mass loss that preceded the explosion of Sanduleak -69 202. The inner debris of the explosion, excited by radioactive isotopes from the explosion, is now resolved and seen to be aspherical, providing direct evidence on the asymmetry of the explosion. Questions about SN 1987A remain unanswered. How did the enigmatic three rings form? Precisely what happened during the core collapse and bounce? Is a black hole or a neutron star left behind? The rich and deep data set from SAINTS will help answer these central questions of supernova science.
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