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The majority of non-merging stellar mass black holes are discovered byobserving high energy emission from accretion processes. Here we pursue thelarge, but still mostly unstudied population of non-interacting black holes andneutron stars by searching for the tidally-induced ellipsoidal variability oftheir stellar companions. We start from a sample of about 200,000 rotationalvariables, semi-regular variables, and eclipsing binary stars from the All-SkyAutomated Survey for Supernovae (ASAS-SN). We use a $\chi^2$ ratio testfollowed by visual inspection to identify 369 candidates for ellipsoidalvariability. We also discuss how to combine the amplitude of the variabilitywith mass and radius estimates for observed stars to calculate a minimumcompanion mass, identifying the most promising candidates for high masscompanions.

High Tide: A Systematic Search for Ellipsoidal Variables in ASAS-SN