Mapping the Periphery and Variability of the Magellanic Clouds

We propose a combination of a modified Wide-Fast-Deep survey, a mini-survey of the South Celestial Pole, and a Deep Drilling-style survey to produce a 3-D map of the Magellanic System and to provide a detailed census of the transient and variable populations in the Clouds. We support modifying the Wide-Fast-Deep survey to cover the declination range $-72.25\mathrm{deg}<\mathrm{D}\mathrm{e}\mathrm{c}<12.4\mathrm{deg}$ and the Galactic latitude range $\mathrm{\mid }b\mathrm{\mid }>15\mathrm{deg}$, as proposed in a separate white paper. We additionally propose a mini-survey covering the 950${\mathrm{deg}}^2$ with ${\rm Dec} < -72.25$in$ugriz$ to the standard LSST single-exposure depth and with 40 visits per filter per field. Finally, we propose a mini-survey covering $\sim 100{\mathrm{deg}}^2$ of the main bodies of the Clouds with twelve total pointings, 2000 total visits per field, and shorter exposure time.