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To extend LSST's coverage of the transient and variable sky down to minutetimescales, we propose that observations of the Deep Drilling Fields areacquired in sequences of continuous exposures each lasting 2--4 hours. Thiswill allow LSST to resolve rapid stellar variability such as short-periodpulsations, exoplanet transits, ultracompact binary systems, and flaremorphologies, while still achieving the desired co-added depths for theselected fields. The greater number of observations of each Deep Drilling Fieldpushes these mini-surveys deep in terms of both sensitivity to low-amplitudevariability and co-added depth. Saving the individual 15-second exposures willyield an effective Nyquist limit of $\approx0.031$ Hz (32 seconds). Resolvedshort-period variability of targets in these fields will aid the interpretationof sparse observations of a greater number of variables in the main survey. Ifthis cadence strategy conflicts with the science goals of individual DeepDrilling Fields, at least a subset of the additional observations of each fieldshould be obtained continuously. This strategy should also be considered forthe proposed Galactic Plane mini survey, which will observe a greater number ofstellar variables and transients.

Continuous Cadence Acquisition of the LSST Deep Drilling Fields