SPIRou radial velocities of AU Mic. Blue triangles show the RVs obtained from CCF matching the original CCFs, and filled circles show the RVs obtained from CCF matching the median-filtered CCFs. Red circles show data masked by our 2.5σ clip. Vertical lines show the predicted start, center, and end of the transit. The green line shows the best-fit model and the thin red lines show models for 100 randomly selected MCMC samples. The gray dashed line shows best-fit slope of 149 ± 9 m s−1 d−1 with an arbitrary vertical offset for visualization, and the orange points show the SPIRou instrumental drift (also with an arbitrary offset), and illustrate its dispersion of just 0.51 m s−1.
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