I spoke with Abby Williams (NYU) and Kate Storey-Fisher (NYU) today about Williams's forecasts for measuring cosmological-scale gradients in the large-scale structure. We came up (many moons ago) with approximate scalings with survey volume, the number of tracers, and the amplitude of the clustering. Some of these are obeyed by Williams's results and some aren't! What gives? We think it might have to do with the occupation number of the modes. If the number density of tracers is high, the clustering precision depends on volume, not galaxy number density.
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